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Bueno CRDS, Buchaim DV, Barraviera B, Ferreira RS, Santos PSDS, Reis CHB, Cini MA, Kuga MC, Rosa GM, Buchaim RL. Delayed repair of the facial nerve and its negative impacts on nerve and muscle regeneration. J Venom Anim Toxins Incl Trop Dis 2024; 30:e20230093. [PMID: 38808073 PMCID: PMC11132725 DOI: 10.1590/1678-9199-jvatitd-2023-0093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 04/12/2024] [Indexed: 05/30/2024] Open
Abstract
Background In this experimental protocol, we evaluated the immediate and delayed repair of the buccal branch of the facial nerve (BBFN) with heterologous fibrin biopolymer (HFB) as a coaptation medium and the use of photobiomodulation (PBM), performing functional and histomorphometric analysis of the BBFN and perioral muscles. Methods Twenty-eight rats were divided into eight groups using the BBFN bilaterally (the left nerve was used for PBM), namely: G1 - control group, right BBFN (without injury); G2 - control group, left BBFN (without injury + PBM); G3 - Denervated right BBFN (neurotmesis); G4 - Denervated left BBFN (neurotmesis + PBM); G5 - Immediate repair of right BBFN (neurotmesis + HFB); G6 - Immediate repair of left BBFN (neurotmesis + HFB + PBM); G7 - Delayed repair of right BBFN (neurotmesis + HFB); G8 - Delayed repair of left BBFN (neurotmesis + HFB + PBM). Delayed repair occurred after two weeks of denervation. All animals were sacrificed after six weeks postoperatively. Results In the parameters of the BBFN, we observed inferior results in the groups with delayed repair, in relation to the groups with immediate repair, with a significant difference (p < 0.05) in the diameter of the nerve fiber, the axon, and the thickness of the myelin sheath of the group with immediate repair with PBM compared to the other experimental groups. In measuring the muscle fiber area, groups G7 (826.4 ± 69.90) and G8 (836.7 ± 96.44) were similar to G5 (882.8 ± 70.51). In the functional analysis, the G7 (4.10 ± 0.07) and G8 (4.12 ± 0.08) groups presented normal parameters. Conclusion We demonstrated that delayed repair of BBFN is possible with HFB, but with worse results compared to immediate repair, and that PBM has a positive influence on nerve regeneration results in immediate repair.
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Affiliation(s)
- Cleuber Rodrigo de Souza Bueno
- Department of Biological Sciences, Bauru School of Dentistry (FOB),
University of São Paulo (USP), Bauru, SP, Brazil
- Dentistry School, University Center of Adamantina (UNIFAI),
Adamantina, SP, Brazil
- Medical School, University Center of Adamantina (UNIFAI),
Adamantina, SP, Brazil
| | - Daniela Vieira Buchaim
- Medical School, University Center of Adamantina (UNIFAI),
Adamantina, SP, Brazil
- Graduate Program in Structural and Functional Interactions in
Rehabilitation, University of Marilia (UNIMAR), Marília, SP, Brazil
- Graduate Program in Anatomy of Domestic and Wild Animals, Faculty of
Veterinary Medicine and Animal Science (FMVZ), University of São Paulo (USP), São
Paulo, SP, Brazil
| | - Benedito Barraviera
- Center for the Study of Venoms and Venomous Animals (CEVAP), São
Paulo State University (UNESP), Botucatu, SP, Brazil
- Graduate Program in Tropical Diseases, Botucatu Medical School
(FMB), São Paulo State University (UNESP), Botucatu, SP, Brazil
| | - Rui Seabra Ferreira
- Center for the Study of Venoms and Venomous Animals (CEVAP), São
Paulo State University (UNESP), Botucatu, SP, Brazil
- Graduate Program in Tropical Diseases, Botucatu Medical School
(FMB), São Paulo State University (UNESP), Botucatu, SP, Brazil
| | - Paulo Sérgio da Silva Santos
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru
School of Dentistry (FOB), University of São Paulo (USP), Bauru, SP, Brazil
| | - Carlos Henrique Bertoni Reis
- Department of Biological Sciences, Bauru School of Dentistry (FOB),
University of São Paulo (USP), Bauru, SP, Brazil
- Graduate Program in Structural and Functional Interactions in
Rehabilitation, University of Marilia (UNIMAR), Marília, SP, Brazil
- UNIMAR Beneficent Hospital (HBU), University of Marilia (UNIMAR),
Marília, SP, Brazil
| | | | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, São Paulo
State University (UNESP), Araraquara, SP, Brazil
| | - Geraldo Marco Rosa
- Dentistry School, Faculty of the Midwest Paulista (FACOP),
Piratininga, SP, Brazil
| | - Rogerio Leone Buchaim
- Department of Biological Sciences, Bauru School of Dentistry (FOB),
University of São Paulo (USP), Bauru, SP, Brazil
- Graduate Program in Anatomy of Domestic and Wild Animals, Faculty of
Veterinary Medicine and Animal Science (FMVZ), University of São Paulo (USP), São
Paulo, SP, Brazil
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Wang X, Zhao Z, Liu Y, Zhang M, Zhao Z. Design of a high speed rat whiskers tracking and symmetry analysis system based on FPGA. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2023; 2023:1-5. [PMID: 38083760 DOI: 10.1109/embc40787.2023.10340867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
This paper presents a high-speed rat whisker tracking and symmetry analysis system based on FPGA. The system utilizes high-speed image sensors recording rat face videos at 120 and 1000 fps. The Xilinx Ultra96 single computer board is chosen as the platform to implement the system's processing system (PS) and the programmable logic (PL) part. The PL part is responsible for high-speed image processing and whisker tracking, while the PS part analyzes the symmetry of rat face using the tracking results from the PL part. With a processing speed FoM of 118.5 fps/GHz on the Xilinx Ultra96 single computer board and 275.47 fps/GHz on a laptop with Intel Core i5-11500T@1.5GHz, the presented system achieves excellent performance. The proposed whisker detection method has a precision of 98.2% when a threshold with a 4-degree error is selected, with an average error angle of 0.98 degrees across more than 10,000 video frames. Moreover, the proposed system is capable of local video processing within millisecond delays. These results demonstrate the feasibility of developing a high-speed, accurate, and efficient whisker tracking and symmetry analysis system for rat behavior research.
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3
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Bueno CRDS, Tonin MCC, Buchaim DV, Barraviera B, Ferreira Junior RS, Santos PSDS, Reis CHB, Pastori CM, Pereira EDSBM, Nogueira DMB, Cini MA, Rosa Junior GM, Buchaim RL. Morphofunctional Improvement of the Facial Nerve and Muscles with Repair Using Heterologous Fibrin Biopolymer and Photobiomodulation. Pharmaceuticals (Basel) 2023; 16:ph16050653. [PMID: 37242436 DOI: 10.3390/ph16050653] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/21/2023] [Accepted: 04/23/2023] [Indexed: 05/28/2023] Open
Abstract
Peripheral nerve injuries impair the patient's functional capacity, including those occurring in the facial nerve, which require effective medical treatment. Thus, we investigated the use of heterologous fibrin biopolymer (HFB) in the repair of the buccal branch of the facial nerve (BBFN) associated with photobiomodulation (PBM), using a low-level laser (LLLT), analyzing the effects on axons, muscles facials, and functional recovery. This experimental study used twenty-one rats randomly divided into three groups of seven animals, using the BBFN bilaterally (the left nerve was used for LLLT): Control group-normal and laser (CGn and CGl); Denervated group-normal and laser (DGn and DGl); Experimental Repair Group-normal and laser (ERGn and ERGl). The photobiomodulation protocol began in the immediate postoperative period and continued for 5 weeks with a weekly application. After 6 weeks of the experiment, the BBFN and the perioral muscles were collected. A significant difference (p < 0.05) was observed in nerve fiber diameter (7.10 ± 0.25 µm and 8.00 ± 0.36 µm, respectively) and axon diameter (3.31 ± 0.19 µm and 4.07 ± 0.27 µm, respectively) between ERGn and ERGl. In the area of muscle fibers, ERGl was similar to GC. In the functional analysis, the ERGn and the ERGI (4.38 ± 0.10) and the ERGI (4.56 ± 0.11) showed parameters of normality. We show that HFB and PBM had positive effects on the morphological and functional stimulation of the buccal branch of the facial nerve, being an alternative and favorable for the regeneration of severe injuries.
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Affiliation(s)
- Cleuber Rodrigo de Souza Bueno
- Department of Biological Sciences, Bauru School of Dentistry (FOB/USP), University of São Paulo, Bauru 17012-901, Brazil
- Dentistry School, University Center of Adamantina (UNIFAI), Adamantina 17800-000, Brazil
- Medical School, University Center of Adamantina (UNIFAI), Adamantina 17800-000, Brazil
| | - Maria Clara Cassola Tonin
- Department of Biological Sciences, Bauru School of Dentistry (FOB/USP), University of São Paulo, Bauru 17012-901, Brazil
| | - Daniela Vieira Buchaim
- Medical School, University Center of Adamantina (UNIFAI), Adamantina 17800-000, Brazil
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, Postgraduate Department, University of Marilia (UNIMAR), Marília 17525-902, Brazil
| | - Benedito Barraviera
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (Universidade Estadual Paulista, UNESP), Botucatu 18610-307, Brazil
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP-Universidade Estadual Paulista), Botucatu 18618-687, Brazil
| | - Rui Seabra Ferreira Junior
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (Universidade Estadual Paulista, UNESP), Botucatu 18610-307, Brazil
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP-Universidade Estadual Paulista), Botucatu 18618-687, Brazil
| | - Paulo Sérgio da Silva Santos
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo, Bauru 17012-901, Brazil
| | - Carlos Henrique Bertoni Reis
- Department of Biological Sciences, Bauru School of Dentistry (FOB/USP), University of São Paulo, Bauru 17012-901, Brazil
- UNIMAR Beneficent Hospital (HBU), University of Marilia (UNIMAR), Marília 17525-160, Brazil
| | | | - Eliana de Souza Bastos Mazuqueli Pereira
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, Postgraduate Department, University of Marilia (UNIMAR), Marília 17525-902, Brazil
| | - Dayane Maria Braz Nogueira
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry (FOB/USP), University of São Paulo, Bauru 17012-901, Brazil
| | - Marcelo Augusto Cini
- Medical School, University of West Paulista (UNOESTE), Guarujá 11441-225, Brazil
| | | | - Rogerio Leone Buchaim
- Department of Biological Sciences, Bauru School of Dentistry (FOB/USP), University of São Paulo, Bauru 17012-901, Brazil
- Graduate Program in Anatomy of Domestic and Wild Animals, Faculty of Veterinary Medicine and Animal Science, University of São Paulo (FMVZ/USP), São Paulo 05508-270, Brazil
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4
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Er-Rouassi H, Bakour M, Touzani S, Vilas-Boas M, Falcão S, Vidal C, Lyoussi B. Beneficial Effect of Bee Venom and Its Major Components on Facial Nerve Injury Induced in Mice. Biomolecules 2023; 13:680. [PMID: 37189427 PMCID: PMC10135545 DOI: 10.3390/biom13040680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/27/2023] [Accepted: 03/31/2023] [Indexed: 05/17/2023] Open
Abstract
Peripheral nerve injury (PNI) is a health problem that affects many people worldwide. This study is the first to evaluate the potential effect of bee venom (BV) and its major components in a model of PNI in the mouse. For that, the BV used in this study was analyzed using UHPLC. All animals underwent a distal section-suture of facial nerve branches, and they were randomly divided into five groups. Group 1: injured facial nerve branches without any treatment. Group 2: the facial nerve branches were injured, and the normal saline was injected similarly as in the BV-treated group. Group 3: injured facial nerve branches with local injections of BV solution. Group 4: injured facial nerve branches with local injections of a mixture of PLA2 and melittin. Group 5: injured facial nerve branches with local injection of betamethasone. The treatment was performed three times a week for 4 weeks. The animals were submitted to functional analysis (observation of whisker movement and quantification of nasal deviation). The vibrissae muscle re-innervation was evaluated by retrograde labeling of facial motoneurons in all experimental groups. UHPLC data showed 76.90 ± 0.13%, 11.73 ± 0.13%, and 2.01 ± 0.01%, respectively, for melittin, phospholipase A2, and apamin in the studied BV sample. The obtained results showed that BV treatment was more potent than the mixture of PLA2 and melittin or betamethasone in behavioral recovery. The whisker movement occurred faster in BV-treated mice than in the other groups, with a complete disappearance of nasal deviation two weeks after surgery. Morphologically, a normal fluorogold labeling of the facial motoneurons was restored 4 weeks after surgery in the BV-treated group, but no such restoration was ever observed in other groups. Our findings indicate the potential of the use of BV injections to enhance appropriate functional and neuronal outcomes after PNI.
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Affiliation(s)
- Hafsa Er-Rouassi
- Centre Borelli, Université de Paris Cité, National Centre for Scientific Research UMR 9010, 75006 Paris, France
- Laboratory of Natural Substances, Pharmacology, Environment, Modeling, Health, and Quality of Life (SNAMOPEQ), Department of Biology, Faculty of Sciences Dhar Mehraz, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
| | - Meryem Bakour
- Laboratory of Natural Substances, Pharmacology, Environment, Modeling, Health, and Quality of Life (SNAMOPEQ), Department of Biology, Faculty of Sciences Dhar Mehraz, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
- The Higher Institute of Nursing Professions and Health Techniques, Fez 30000, Morocco
| | - Soumaya Touzani
- Laboratory of Natural Substances, Pharmacology, Environment, Modeling, Health, and Quality of Life (SNAMOPEQ), Department of Biology, Faculty of Sciences Dhar Mehraz, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
| | - Miguel Vilas-Boas
- Centro de Investigação de Montanha, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-252 Bragança, Portugal
| | - Soraia Falcão
- Centro de Investigação de Montanha, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-252 Bragança, Portugal
| | - Catherine Vidal
- Centre Borelli, Université de Paris Cité, National Centre for Scientific Research UMR 9010, 75006 Paris, France
| | - Badiaa Lyoussi
- Laboratory of Natural Substances, Pharmacology, Environment, Modeling, Health, and Quality of Life (SNAMOPEQ), Department of Biology, Faculty of Sciences Dhar Mehraz, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
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5
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Trigeminal Sensory Supply Is Essential for Motor Recovery after Facial Nerve Injury. Int J Mol Sci 2022; 23:ijms232315101. [PMID: 36499425 PMCID: PMC9740813 DOI: 10.3390/ijms232315101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/27/2022] [Accepted: 11/29/2022] [Indexed: 12/03/2022] Open
Abstract
Recovery of mimic function after facial nerve transection is poor. The successful regrowth of regenerating motor nerve fibers to reinnervate their targets is compromised by (i) poor axonal navigation and excessive collateral branching, (ii) abnormal exchange of nerve impulses between adjacent regrowing axons, namely axonal crosstalk, and (iii) insufficient synaptic input to the axotomized facial motoneurons. As a result, axotomized motoneurons become hyperexcitable but unable to discharge. We review our findings, which have addressed the poor return of mimic function after facial nerve injuries, by testing the hypothesized detrimental component, and we propose that intensifying the trigeminal sensory input to axotomized and electrophysiologically silent facial motoneurons improves the specificity of the reinnervation of appropriate targets. We compared behavioral, functional, and morphological parameters after single reconstructive surgery of the facial nerve (or its buccal branch) with those obtained after identical facial nerve surgery, but combined with direct or indirect stimulation of the ipsilateral infraorbital nerve. We found that both methods of trigeminal sensory stimulation, i.e., stimulation of the vibrissal hairs and manual stimulation of the whisker pad, were beneficial for the outcome through improvement of the quality of target reinnervation and recovery of vibrissal motor performance.
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6
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Personius KE, Siebert D, Koch DW, Udin SB. Blockage of neuromuscular glutamate receptors impairs reinnervation following nerve crush in adult mice. Front Cell Neurosci 2022; 16:1000218. [PMID: 36212695 PMCID: PMC9535682 DOI: 10.3389/fncel.2022.1000218] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 09/02/2022] [Indexed: 11/29/2022] Open
Abstract
Motor axons in peripheral nerves are capable of regeneration following injury. However, complete recovery of motor function is rare, particularly when reinnervation is delayed. We have previously found that glutamate receptors play a crucial role in the successful innervation of muscle during mouse development. In particular, blocking N-methyl-D-aspartate (NMDA) receptor activity delays the normal elimination of excess innervation of each neuromuscular junction. Here, we use behavioral, immunohistochemical, electrophysiological, and calcium imaging methods to test whether glutamate receptors play a similar role in the transition from polyneuronal to mono-innervation and in recovery of function following peripheral nerve injury in mature muscle.
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Affiliation(s)
- Kirkwood E. Personius
- Program in Neuroscience, School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States
- Department of Rehabilitation Science, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, United States
- *Correspondence: Kirkwood E. Personius,
| | - Danielle Siebert
- Program in Neuroscience, School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States
| | - Dennis W. Koch
- Department of Kinesiology, Canisius College, Buffalo, NY, United States
| | - Susan B. Udin
- Program in Neuroscience, School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States
- Department of Physiology and Biophysics, School of Medicine and Biomedical Sciences, Buffalo, NY, United States
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Neville C, Gwynn T, Young K, Jordan E, Malhotra R, Nduka C, Kannan RY. Comparative Study of Multimodal Therapy in Facial Palsy Patients. Arch Plast Surg 2022; 49:633-641. [PMID: 36159376 PMCID: PMC9507561 DOI: 10.1055/s-0042-1756352] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 07/07/2022] [Indexed: 11/11/2022] Open
Abstract
Introduction
In chronic facial palsy, synkinetic muscle overactivity and shortening causes muscle stiffness resulting in reduced movement and functional activity. This article studies the role of multimodal therapy in improving outcomes.
Methods
Seventy-five facial palsy patients completed facial rehabilitation before being successfully discharged by the facial therapy team. The cohort was divided into four subgroups depending on the time of initial attendance post-onset. The requirement for facial therapy, chemodenervation, or surgery was assessed with East Grinstead Grade of Stiffness (EGGS). Outcomes were measured using the Facial Grading Scale (FGS), Facial Disability Index, House-Brackmann scores, and the Facial Clinimetric Evaluation scale.
Results
FGS composite scores significantly improved posttherapy (mean-standard deviation, 60.13 ± 23.24 vs. 79.9 ± 13.01; confidence interval, –24.51 to –14.66,
p
< 0.0001). Analysis of FGS subsets showed that synkinesis also reduced significantly (
p
< 0.0001). Increasingly, late clinical presentations were associated with patients requiring longer durations of chemodenervation treatment (
p
< 0.01), more chemodenervation episodes (
p
< 0.01), increased doses of botulinum toxin (
p
< 0.001), and having higher EGGS score (
p
< 0.001).
Conclusions
This study shows that multimodal facial rehabilitation in the management of facial palsy is effective, even in patients with chronically neglected synkinesis. In terms of the latency periods between facial palsy onset and treatment initiation, patients presenting later than 2 years were still responsive to multimodal treatment albeit to a lesser extent, which we postulate is due to increasing muscle contracture within their facial muscles.
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Affiliation(s)
- Catriona Neville
- Facial Palsy Unit, Queen Victoria Hospital, East Grinstead, United Kingdom
| | - Tamsin Gwynn
- Facial Palsy Unit, Queen Victoria Hospital, East Grinstead, United Kingdom
| | - Karen Young
- Facial Palsy Unit, Queen Victoria Hospital, East Grinstead, United Kingdom
| | - Elizabeth Jordan
- Department of Psychological Therapy, Queen Victoria Hospital, East Grinstead, United Kingdom
| | - Raman Malhotra
- Facial Palsy Unit, Queen Victoria Hospital, East Grinstead, United Kingdom.,Department of Oculoplastic Surgery, Queen Victoria Hospital, East Grinstead, United Kingdom
| | - Charles Nduka
- Facial Palsy Unit, Queen Victoria Hospital, East Grinstead, United Kingdom
| | - Ruben Yap Kannan
- Facial Palsy Unit, Queen Victoria Hospital, East Grinstead, United Kingdom
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8
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Martineau S, Rahal A, Piette E, Moubayed S, Marcotte K. The "Mirror Effect Plus Protocol" for acute Bell's palsy: A randomized controlled trial with 1-year follow-up. Clin Rehabil 2022; 36:1292-1304. [PMID: 35722671 PMCID: PMC9420890 DOI: 10.1177/02692155221107090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objective To study the effects of the “Mirror Effect Plus Protocol” (MEPP) on global facial function in acute and severe Bell's Palsy. Design Single blind and randomized controlled trial to compare the effects of basic counseling (control group) versus MEPP (experimental group) over one year. Setting Outpatient clinic following referrals from Emergency or Otorhinolaryngology Departments. Subjects 40 patients (n = 20 per group) with moderately severe to total palsy who received standard medication were recruited within 14 days of onset. Baseline characteristics were comparable between the groups. Interventions The experimental group received the MEPP program (motor imagery + manipulations + facial mirror therapy) while the control group received basic counseling. Both groups met the clinician monthly until 6 months and at one-year post-onset for assessments. Outcome measures Facial symmetry, synkinesis, and quality of life were measured using standardized scales. Perceived speech intelligibility was rated before and after therapy by naïve judges. Results Descriptive statistics demonstrated improvements in favor of the MEPP for each measured variable. Significant differences were found for one facial symmetry score (House-Brackmann 2.0 mean (SD) = 7.40 (3.15) for controls versus 5.1 (1.44) for MEPP), for synkinesis measures (p = 0.008) and for quality-of-life ratings (mean (SD) score = 83.17% (17.383) for controls versus 98.36% (3.608) for MEPP (p = 0.002)). No group difference was found for perceived speech intelligibility. Conclusion The MEPP demonstrates promising long-term results when started during the acute phase of moderately severe to total Bell's Palsy.
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Affiliation(s)
- Sarah Martineau
- Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada.,Centre de recherche du Centre intégré Universitaire de santé et services sociaux du Nord-de-l'île-de-Montréal, Hôpital du Sacré-Cœur de Montréal, Montréal, Québec, Canada.,Département d'oto-rhino-laryngologie, Centre Intégré Universitaire de Santé et Services Sociaux de l'Est-de-l'Île de Montréal, Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada
| | - Akram Rahal
- Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada.,Département d'oto-rhino-laryngologie, Centre Intégré Universitaire de Santé et Services Sociaux de l'Est-de-l'Île de Montréal, Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada
| | - Eric Piette
- Centre de recherche du Centre intégré Universitaire de santé et services sociaux du Nord-de-l'île-de-Montréal, Hôpital du Sacré-Cœur de Montréal, Montréal, Québec, Canada.,Département de médecine d'urgence, Centre intégré universitaire de santé et services sociaux du Nord-de-l'île-de-Montréal, Hôpital du Sacré-Cœur de Montréal, Montréal, Québec, Canada
| | - Sami Moubayed
- Centre de recherche du Centre intégré Universitaire de santé et services sociaux du Nord-de-l'île-de-Montréal, Hôpital du Sacré-Cœur de Montréal, Montréal, Québec, Canada.,Département d'oto-rhino-laryngologie, Centre intégré universitaire de santé et services sociaux du Nord-de-l'île-de-Montréal, Hôpital du Sacré-Cœur de Montréal, Montréal, Québec, Canada
| | - Karine Marcotte
- Centre de recherche du Centre intégré Universitaire de santé et services sociaux du Nord-de-l'île-de-Montréal, Hôpital du Sacré-Cœur de Montréal, Montréal, Québec, Canada.,Département d'oto-rhino-laryngologie, Centre Intégré Universitaire de Santé et Services Sociaux de l'Est-de-l'Île de Montréal, Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada
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9
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Barham M, Streppel M, Guntinas-Lichius O, Fulgham-Scott N, Vogt J, Neiss WF. Treatment With Nimodipine or FK506 After Facial Nerve Repair Neither Improves Accuracy of Reinnervation Nor Recovery of Mimetic Function in Rats. Front Neurosci 2022; 16:895076. [PMID: 35645727 PMCID: PMC9136327 DOI: 10.3389/fnins.2022.895076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 04/25/2022] [Indexed: 11/13/2022] Open
Abstract
Purpose Nimodipine and FK506 (Tacrolimus) are drugs that have been reported to accelerate peripheral nerve regeneration. We therefore tested these substances aiming to improve the final functional outcome of motoric reinnervation after facial nerve injury. Methods In 18 female rats, the transected facial nerve was repaired by an artificial nerve conduit. The rats were then treated with either placebo, nimodipine, or FK506, for 56 days. Facial motoneurons were pre-operatively double-labeled by Fluoro-Gold and again 56 days post-operation by Fast-Blue to measure the cytological accuracy of reinnervation. The whisking motion of the vibrissae was analyzed to assess the quality of functional recovery. Results On the non-operated side, 93–97% of those facial nerve motoneurons innervating the vibrissae were double-labeled. On the operated side, double-labeling only amounted to 38% (placebo), 40% (nimodipine), and 39% (FK506), indicating severe misdirection of reinnervation. Regardless of post-operative drug or placebo therapy, the whisking frequency reached 83–100% of the normal value (6.0 Hz), but whisking amplitude was reduced to 33–48% while whisking velocity reached 39–66% of the normal values. Compared to placebo, statistically neither nimodipine nor FK506 improved accuracy of reinnervation and function recovery. Conclusion Despite previous, positive data on the speed and quantity of axonal regeneration, nimodipine and FK506 do not improve the final functional outcome of motoric reinnervation in rats.
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Affiliation(s)
- Mohammed Barham
- Department II of Anatomy, Faculty of Medicine, University of Cologne and University Hospital of Cologne, Cologne, Germany
- *Correspondence: Mohammed Barham,
| | - Michael Streppel
- Department of Ear, Nose and Throat-Department (ENT), PAN-Clinic at Neumarkt, Cologne, Germany
| | | | - Nicole Fulgham-Scott
- Department I of Anatomy, Faculty of Medicine, University of Cologne and University Hospital of Cologne, Cologne, Germany
| | - Johannes Vogt
- Department II of Anatomy, Faculty of Medicine, University of Cologne and University Hospital of Cologne, Cologne, Germany
| | - Wolfram F. Neiss
- Department I of Anatomy, Faculty of Medicine, University of Cologne and University Hospital of Cologne, Cologne, Germany
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10
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Er-Rouassi H, Benichou L, Lyoussi B, Vidal C. Efficacy of LED Photobiomodulation for Functional and Axonal Regeneration After Facial Nerve Section-Suture. Front Neurol 2022; 13:827218. [PMID: 35280271 PMCID: PMC8905314 DOI: 10.3389/fneur.2022.827218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 01/14/2022] [Indexed: 11/13/2022] Open
Abstract
Facial nerve damage can lead to partial or total facial nerve palsy. Photobiomodulation has been reported to improve and accelerate functional recovery following peripheral nerve lesion, depending on the type of lesion and the light exposure parameters used. The aim of this study was to investigate the effects of infrared exposure on functional and axonal regeneration after section-suture of the distal branches of the facial nerve: the buccal and marginal mandibular branches and the distal pes. The animals underwent surgery and were irradiated with infrared light at 850 nm twice daily from day 1 to day 16. The recovery of facial function was then studied at both the behavioral and morphological levels. Behavioral analyses were performed by videoscoring with a high-speed camera and using various devices to assess the recovery of whisker movement on the lesioned side from day 1 to day 30. We also assessed nasal deviation toward the intact side and the ability to close the ipsilateral eyelid completely from day 1 to day 38 and from day 1 to day 50, respectively. For morphological analyses, we assessed the re-establishment of facial motoneuron labeling with Fluorogold®, an immunofluorescent retrograde marker of axonal transport injected into the vibrissae, on D10, D14 and D30. We found that whisker movements recovery was significantly faster in treated than in control mice. A complete disappearance of nasal deviation was observed at 2 weeks in infrared-treated lesioned mice and at 5 weeks in controls. Complete eyelid closure was observed 3 weeks after surgery in treated animals and 6 weeks after surgery in controls. Finally, normal fluorogold labeling of the facial nuclei complex was restored 30 days after surgery in the treated animals, but no such restoration was ever observed in control animals. In conclusion, our data show that IR treatment at a distal site has a significant positive effect on facial nerve recovery. These findings pave the way for the clinical use of infrared photobiomodulation in patients with nerve lesions.
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Affiliation(s)
- Hafsa Er-Rouassi
- Centre Borelli, CNRS UMR-9010, Université de Paris, Paris, France.,Laboratory of Natural Substances, Pharmacology, Environment, Modeling, Health, and Quality of Life (SNAMOPEQ), Department of Biology, Faculty of Sciences Dhar Mehraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Luc Benichou
- Paris-Est Créteil Université (UPEC) Faculté de Médecine, Creteil, France
| | - Badiaa Lyoussi
- Laboratory of Natural Substances, Pharmacology, Environment, Modeling, Health, and Quality of Life (SNAMOPEQ), Department of Biology, Faculty of Sciences Dhar Mehraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Catherine Vidal
- Centre Borelli, CNRS UMR-9010, Université de Paris, Paris, France
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11
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Mini review: Biomaterials in repair and regeneration of nerve in a volumetric muscle loss. Neurosci Lett 2021; 762:136145. [PMID: 34332029 DOI: 10.1016/j.neulet.2021.136145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 06/28/2021] [Accepted: 07/26/2021] [Indexed: 01/23/2023]
Abstract
Volumetric muscle loss (VML) following a severe trauma or injury is beyond the intrinsic regenerative capacity of muscle tissues, and hence interventional therapy is required. Extensive muscle loss concomitant with damage to neuromuscular components overwhelms the muscles' remarkable regenerative capacity. The loss of nervous and vascular tissue leads to further damage and atrophy, so a combined treatment for neuromuscular junction (NMJ) along with the volumetric muscle regeneration is important. There have been immense advances in the field of tissue engineering for skeletal muscle tissue and peripheral nerve regeneration, but very few address the interdependence of the tissues and the need for combined therapies to repair and regenerate fully functional muscle tissue. This review addresses the problem and presents an overview of the biomaterials that have been studied for tissue engineering of neuromuscular tissues associated with skeletal muscles.
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12
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Tereshenko V, Dotzauer DC, Maierhofer U, Festin C, Luft M, Laengle G, Politikou O, Klein HJ, Blumer R, Aszmann OC, Bergmeister KD. Selective Denervation of the Facial Dermato-Muscular Complex in the Rat: Experimental Model and Anatomical Basis. Front Neuroanat 2021; 15:650761. [PMID: 33828465 PMCID: PMC8019738 DOI: 10.3389/fnana.2021.650761] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 03/01/2021] [Indexed: 11/13/2022] Open
Abstract
The facial dermato-muscular system consists of highly specialized muscles tightly adhering to the overlaying skin and thus form a complex morphological conglomerate. This is the anatomical and functional basis for versatile facial expressions, which are essential for human social interaction. The neural innervation of the facial skin and muscles occurs via branches of the trigeminal and facial nerves. These are also the most commonly pathologically affected cranial nerves, often requiring surgical treatment. Hence, experimental models for researching these nerves and their pathologies are highly relevant to study pathophysiology and nerve regeneration. Experimental models for the distinctive investigation of the complex afferent and efferent interplay within facial structures are scarce. In this study, we established a robust surgical model for distinctive exploration of facial structures after complete elimination of afferent or efferent innervation in the rat. Animals were allocated into two groups according to the surgical procedure. In the first group, the facial nerve and in the second all distal cutaneous branches of the trigeminal nerve were transected unilaterally. All animals survived and no higher burden was caused by the procedures. Whisker pad movements were documented with video recordings 4 weeks after surgery and showed successful denervation. Whole-mount immunofluorescent staining of facial muscles was performed to visualize the innervation pattern of the neuromuscular junctions. Comprehensive quantitative analysis revealed large differences in afferent axon counts in the cutaneous branches of the trigeminal nerve. Axon number was the highest in the infraorbital nerve (28,625 ± 2,519), followed by the supraorbital nerve (2,131 ± 413), the mental nerve (3,062 ± 341), and the cutaneous branch of the mylohyoid nerve (343 ± 78). Overall, this surgical model is robust and reliable for distinctive surgical deafferentation or deefferentation of the face. It may be used for investigating cortical plasticity, the neurobiological mechanisms behind various clinically relevant conditions like facial paralysis or trigeminal neuralgia as well as local anesthesia in the face and oral cavity.
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Affiliation(s)
- Vlad Tereshenko
- Clinical Laboratory for Bionic Extremity Reconstruction, Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Vienna, Austria.,Center for Biomedical Research, Medical University of Vienna, Vienna, Austria
| | - Dominik C Dotzauer
- Clinical Laboratory for Bionic Extremity Reconstruction, Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Vienna, Austria
| | - Udo Maierhofer
- Clinical Laboratory for Bionic Extremity Reconstruction, Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Vienna, Austria.,Center for Biomedical Research, Medical University of Vienna, Vienna, Austria
| | - Christopher Festin
- Clinical Laboratory for Bionic Extremity Reconstruction, Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Vienna, Austria.,Center for Biomedical Research, Medical University of Vienna, Vienna, Austria
| | - Matthias Luft
- Clinical Laboratory for Bionic Extremity Reconstruction, Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Vienna, Austria.,Center for Biomedical Research, Medical University of Vienna, Vienna, Austria
| | - Gregor Laengle
- Clinical Laboratory for Bionic Extremity Reconstruction, Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Vienna, Austria.,Center for Biomedical Research, Medical University of Vienna, Vienna, Austria
| | - Olga Politikou
- Clinical Laboratory for Bionic Extremity Reconstruction, Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Vienna, Austria.,Center for Biomedical Research, Medical University of Vienna, Vienna, Austria
| | - Holger J Klein
- Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Roland Blumer
- Center for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria
| | - Oskar C Aszmann
- Clinical Laboratory for Bionic Extremity Reconstruction, Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Vienna, Austria.,Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Vienna, Austria
| | - Konstantin D Bergmeister
- Clinical Laboratory for Bionic Extremity Reconstruction, Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Vienna, Austria.,Department of Plastic, Aesthetic and Reconstructive Surgery, University Hospital St. Poelten, Karl Landsteiner University of Health Sciences, Krems, Austria.,Department of Plastic, Aesthetic and Reconstructive Surgery, University Hospital St. Poelten, Krems, Austria
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13
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Syngeneic Transplantation of Rat Olfactory Stem Cells in a Vein Conduit Improves Facial Movements and Reduces Synkinesis after Facial Nerve Injury. Plast Reconstr Surg 2021; 146:1295-1305. [PMID: 33234960 DOI: 10.1097/prs.0000000000007367] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Posttraumatic facial paralysis is a disabling condition. Current surgical management by faciofacial nerve suture provides limited recovery. To improve the outcome, the authors evaluated an add-on strategy based on a syngeneic transplantation of nasal olfactory stem cells in a rat model of facial nerve injury. The main readouts of the study were the recording of whisking function and buccal synkinesis. METHODS Sixty rats were allocated to three groups. Animals with a 2-mm facial nerve loss were repaired with a femoral vein, filled or not with olfactory stem cells. These two groups were compared to similarly injured rats but with a faciofacial nerve suture. Olfactory stem cells were purified from rat olfactory mucosa. Three months after surgery, facial motor performance was evaluated using video-based motion analysis and electromyography. Synkinesis was assessed by electromyography, using measure of buccal involuntary movements during blink reflex, and double retrograde labeling of regenerating motoneurons. RESULTS The authors' study reveals that olfactory stem cell transplantation induces functional recovery in comparison to nontransplanted and faciofacial nerve suture groups. They significantly increase (1) maximal amplitude of vibrissae protraction and retraction cycles and (2) angular velocity during protraction of vibrissae. They also reduce buccal synkinesis, according to the two techniques used. However, olfactory stem cell transplantation did not improve axonal regrowth of the facial nerve, 3 months after surgery. CONCLUSIONS The authors show here that the adjuvant strategy of syngeneic transplantation of olfactory stem cells improves functional recovery. These promising results open the way for a phase I clinical trial based on the autologous engraftment of olfactory stem cells in patients with a facial nerve paralysis.
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14
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Wong M, Takushima A. Variability in the development of synkinesis in a rabbit facial nerve axotomy model. J Plast Reconstr Aesthet Surg 2020; 74:1455-1463. [PMID: 33303412 DOI: 10.1016/j.bjps.2020.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 08/31/2020] [Accepted: 11/12/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Weakness and synkinesis (involuntary cocontraction of different muscle groups) are common sequelae after facial nerve injury. We describe a rabbit model of facial nerve axotomy and repair, which can be used to study such sequelae and propose a grading tool to assess the facial movement outcomes. Using this rabbit model, we assess the effect of delaying facial nerve repair on the quality of the clinical result. METHODS A total of 15 rabbits (30 facial halves) were divided into 4 groups: control, facial nerve main trunk axotomy and immediate repair, axotomy and repair at 2.5 weeks as well as axotomy, and repair at 2 months. Functional recovery was graded according to the observable criteria. We performed retrograde fluorescence labelling of the distal facial nerve branches and assessed the distribution of tracers in the facial nucleus. RESULTS A consistent model of weakness and synkinesis was produced in all rabbits after immediate axotomy and repair. A grading tool was used to clinically grade the quality of the recovery. The somatotopy of the facial nucleus was disrupted, with axons projecting from the facial nucleus to incorrect facial muscle groups. Varying the denervation time before repair affected the quality of the recovery. The worst result was noted when repair was delayed for 2 months. Subtle changes in the pattern and severity of synkinesis was noted among the different treatment groups. CONCLUSION A slight delay in nerve repair by 2.5 weeks as well as contralateral facial paralysis (analogous to botulinum toxin (BTX) injection) appear to improve eye recovery and reduce synkinesis. Because of the large size of the rabbit, such variability in synkinesis severity can be graded.
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Affiliation(s)
- Manzhi Wong
- Department of Plastic, Reconstructive & Aesthetic Surgery, Singapore General Hospital, Singapore.
| | - Akihiko Takushima
- Department of Plastic Surgery, Kyorin University School of Medicine, Tokyo, Japan
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15
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Chacon MA, Echternacht SR, Leckenby JI. Outcome measures of facial nerve regeneration: A review of murine model systems. Ann Anat 2020; 227:151410. [DOI: 10.1016/j.aanat.2019.07.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 07/16/2019] [Indexed: 12/14/2022]
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16
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Restoration of the Topological Organization of the Trigeminal System Following Trigeminal Nerve Root Injury in the Lamprey. Neuroscience 2019; 423:216-231. [PMID: 31484046 DOI: 10.1016/j.neuroscience.2019.08.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 08/21/2019] [Accepted: 08/23/2019] [Indexed: 12/13/2022]
Abstract
Two issues were examined regarding the trigeminal system in larval lampreys: (1) for normal animals, double labeling was used to confirm that the trigeminal system has a topological organization; (2) following trigeminal nerve root transections, double labeling was used to test whether the topological organization of the trigeminal system is restored. First, for normal animals, Alexa 488 dextran amine applied to the medial oral hood (anterior head) labeled trigeminal motoneurons (MNs) in the ventromedial part of the trigeminal motor nuclei (nVm) and axons of trigeminal sensory neurons (SNs) in the ventromedial part of the trigeminal descending tracts (dV). Also, Texas red dextran amine (TRDA) applied to the lateral oral hood labeled trigeminal MNs in the dorsolateral nVm and sensory axons in the dorsolateral dV. These results confirm the topological organization of the trigeminal system of normal lampreys. Second, following trigeminal nerve root transections, the physical integrity of the nerves was restored during growth of trigeminal sensory and motor axons. In addition, double labeling indicated a restoration and refinement of the topological organization of the trigeminal system with increasing recovery times, but mainly for nVm. Despite the paucity of growth of trigeminal sensory axons in dV even at long recovery times (12-16 wks), a substantial percentage of experimental animals recovered trigeminal-evoked swimming responses and trigeminal-evoked synaptic responses in reticulospinal (RS) neurons. Following trigeminal nerve root injury, several mechanisms, including axonal guidance cues, probably contribute to the substantial restoration of the topological organization of the lamprey trigeminal system.
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17
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Ozsoy U, Ogut E, Sekerci R, Hizay A, Rink S, Angelov DN. Effect of Pulsed and Continuous Ultrasound Therapy on the Degree of Collateral Axonal Branching at the Lesion Site, Polyinnervation of Motor End Plates, and Recovery of Motor Function after Facial Nerve Reconstruction. Anat Rec (Hoboken) 2019; 302:1314-1324. [DOI: https:/doi.org/10.1002/ar.24122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 11/27/2018] [Indexed: 07/22/2023]
Affiliation(s)
- Umut Ozsoy
- Department of Anatomy, Faculty of MedicineAkdeniz University Antalya Turkey
| | - Eren Ogut
- Department of Anatomy, Faculty of MedicineAkdeniz University Antalya Turkey
| | - Rahime Sekerci
- Department of Anatomy, Faculty of MedicineAkdeniz University Antalya Turkey
| | - Arzu Hizay
- Department of Anatomy, Faculty of MedicineAkdeniz University Antalya Turkey
| | - Svenja Rink
- Department of Prosthetic DentistrySchool of Dental and Oral Medicine, University of Cologne Cologne Germany
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18
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Pei YC, Cheng YP, Chen JL, Lin CH, Wen CJ, Huang JJ. Early recovery of neuronal functioning in the sensory cortex after nerve reconstruction surgery. Restor Neurol Neurosci 2019; 37:409-419. [PMID: 31322584 PMCID: PMC6700653 DOI: 10.3233/rnn-190914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Nerve reconstructive surgery induces a transient loss and a prolonged and a gradual return of sensory inputs to the brain. It is unknown whether, following this massive peripheral denervation, the brain will experience a prolonged period of severe, intrinsic dysfunction. OBJECTIVE We aim to investigate the mechanisms of return of processing function in cortical neurons. METHODS We used the whisker model in rats to evaluate the functional recovery in the somatosensory cortex after a nerve reconstruction surgery. Multi-unit recording in the barrel cortex was performed in lightly anesthetized rats while their whiskers were stimulated by a whisker stimulator. RESULTS We observed a loss of neuronal responses to whisker stimulation 1 week after surgery, which started to recover 2 weeks after surgery. Following the surgery, only 11.8% of units had principle whiskers (PWs) returned to their original status while 17.7% had PWs different from their original status, indicating the effect of aberrant reinnervation on the whisker response map. CONCLUSIONS Robust neuronal responses to sensory stimulation even when only sparse sensory inputs are available in the early recovery phase. During this phase, aberrant reinnervation induces disorganized whisker tuning, a finding that might be account for the hypoesthesia and paresthesia during early recovery after nerve reconstruction.
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Affiliation(s)
- Yu-Chen Pei
- Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan.,School of Medicine, Chang Gung University, Taoyuan City, Taiwan.,Center for Vascularized Composite Allotransplantation, Chang Gung Memorial Hospital, Taoyuan City, Taiwan.,Healthy Aging Research Center, Chang Gung University, Taoyuan City, Taiwan
| | - Yu-Po Cheng
- Department of Psychology, National Taiwan University, Taipei, Taiwan
| | - Ji-Lin Chen
- Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan.,School of Medicine, Chang Gung University, Taoyuan City, Taiwan
| | - Cheng-Hung Lin
- School of Medicine, Chang Gung University, Taoyuan City, Taiwan.,Center for Vascularized Composite Allotransplantation, Chang Gung Memorial Hospital, Taoyuan City, Taiwan.,Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan
| | - Chih-Jen Wen
- Center for Vascularized Composite Allotransplantation, Chang Gung Memorial Hospital, Taoyuan City, Taiwan.,Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan
| | - Jian-Jia Huang
- Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan.,School of Medicine, Chang Gung University, Taoyuan City, Taiwan.,Center for Vascularized Composite Allotransplantation, Chang Gung Memorial Hospital, Taoyuan City, Taiwan
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19
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Ali SA, Rosko AJ, Hanks JE, Stebbins AW, Alkhalili O, Hogikyan ND, Feldman EL, Brenner MJ. Effect of Motor versus Sensory Nerve Autografts on Regeneration and Functional Outcomes of Rat Facial Nerve Reconstruction. Sci Rep 2019; 9:8353. [PMID: 31175313 PMCID: PMC6555820 DOI: 10.1038/s41598-019-44342-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 05/13/2019] [Indexed: 02/07/2023] Open
Abstract
Cranial nerve injury is disabling for patients, and facial nerve injury is particularly debilitating due to combined functional impairment and disfigurement. The most widely accepted approaches for reconstructing nerve gap injuries involve using sensory nerve grafts to bridge the nerve defect. Prior work on preferential motor reinnervation suggests, however, that motor pathways may preferentially support motoneuron regeneration after nerve injury. The effect of motor versus sensory nerve grafting after facial nerve injury has not been previously investigated. Insights into outcomes of motor versus sensory grafting may improve understanding and clinical treatment of facial nerve paralysis, mitigating facial asymmetry, aberrant reinnervation, and synkinesis. This study examined motor versus sensory grafting of the facial nerve to investigate effect of pathway on regeneration across a 5-mm rodent facial nerve defect. We enrolled 18 rats in 3 cohorts (motor, sensory, and defect) and recorded outcome measures including fiber count/nerve density, muscle endplate reinnervation, compound muscle action potential, and functional whisker twitch analysis. Outcomes were similar for motor versus sensory groups, suggesting similar ability of sensory and motor grafts to support regeneration in a clinically relevant model of facial nerve injury.
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Affiliation(s)
- S Ahmed Ali
- Department of Otolaryngology - Head and Neck Surgery, Michigan Medicine, Ann Arbor, MI, USA
| | - Andrew J Rosko
- Department of Otolaryngology - Head and Neck Surgery, Michigan Medicine, Ann Arbor, MI, USA
| | - John E Hanks
- Department of Otolaryngology - Head and Neck Surgery, Michigan Medicine, Ann Arbor, MI, USA
| | - Aaron W Stebbins
- Department of Otolaryngology - Head and Neck Surgery, Michigan Medicine, Ann Arbor, MI, USA.,Department of Neurology, Michigan Medicine, Ann Arbor, MI, USA
| | - Osama Alkhalili
- Department of Neurology, Michigan Medicine, Ann Arbor, MI, USA
| | - Norman D Hogikyan
- Department of Otolaryngology - Head and Neck Surgery, Michigan Medicine, Ann Arbor, MI, USA
| | - Eva L Feldman
- Department of Neurology, Michigan Medicine, Ann Arbor, MI, USA
| | - Michael J Brenner
- Department of Otolaryngology - Head and Neck Surgery, Michigan Medicine, Ann Arbor, MI, USA.
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20
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Development of the interscutularis model as an outcome measure for facial nerve surgery. Ann Anat 2019; 223:127-135. [DOI: 10.1016/j.aanat.2019.03.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 03/04/2019] [Accepted: 03/07/2019] [Indexed: 01/23/2023]
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21
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Bendella H, Rink S, Manthou M, Papamitsou T, Nakamura M, Angelov DN, Sarikcioglu L. Effect of surgically guided axonal regrowth into a 3-way-conduit (isogeneic trifurcated aorta) on functional recovery after facial-nerve reconstruction: Experimental study in rats. Restor Neurol Neurosci 2019; 37:181-196. [PMID: 31006701 DOI: 10.3233/rnn-190899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The "post-paralytic syndrome" after facial nerve reconstruction has been attributed to (i) malfunctioning axonal guidance at the fascicular (branches) level, (ii) collateral branching of the transected axons at the lesion site, and (iii) intensive intramuscular terminal sprouting of regenerating axons which causes poly-innervation of the neuromuscular junctions (NMJ). OBJECTIVE The first two reasons were approached by an innovative technique which should provide the re-growing axons optimal conditions to elongate and selectively re-innervate their original muscle groups. METHODS The transected facial nerve trunk was inserted into a 3-way-conduit (from isogeneic rat abdominal aorta) which should "guide" the re-growing facial axons to the three main branches of the facial nerve (zygomatic, buccal and marginal mandibular). The effect of this method was tested also on hypoglossal axons after hypoglossal-facial anastomosis (HFA). Coaptational (classic) FFA (facial-facial anastomosis) and HFA served as controls. RESULTS When compared to their coaptation (classic) alternatives, both types of 3-way-conduit operations (FFA and HFA) promoted a trend for reduction in the collateral axonal branching (the proportion of double- or triple-labelled perikarya after retrograde tracing was slightly reduced). In contrast, poly-innervation of NMJ in the levator labii superioris muscle was increased and vibrissal (whisking) function was worsened. CONCLUSIONS The use of 3-way-conduit provides no advantages to classic coaptation. Should the latter be impossible (too large interstump defects requiring too long interpositional nerve grafts), this type of reconstruction may be applied. (230 words).
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Affiliation(s)
- Habib Bendella
- Department of Neurosurgery, University of Witten/Herdecke, Cologne Merheim Medical Center (CMMC), Cologne, Germany
| | - Svenja Rink
- Department of Prosthetic Dentistry, School of Dental and Oral Medicine, University of Cologne, Cologne, Germany
| | - Marilena Manthou
- Department of Histology and Embryology, Aristotle University Thessaloniki, Greece
| | - Theodora Papamitsou
- Department of Histology and Embryology, Aristotle University Thessaloniki, Greece
| | - Makoto Nakamura
- Department of Neurosurgery, University of Witten/Herdecke, Cologne Merheim Medical Center (CMMC), Cologne, Germany
| | | | - Levent Sarikcioglu
- Department of Anatomy, Akdeniz University Faculty of Medicine, Antalya, Turkey
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22
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Effect of Pulsed and Continuous Ultrasound Therapy on the Degree of Collateral Axonal Branching at the Lesion Site, Polyinnervation of Motor End Plates, and Recovery of Motor Function after Facial Nerve Reconstruction. Anat Rec (Hoboken) 2019; 302:1314-1324. [PMID: 30950229 DOI: 10.1002/ar.24122] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 11/20/2018] [Accepted: 11/27/2018] [Indexed: 11/07/2022]
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23
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Rink S, Bendella H, Akkin SM, Manthou M, Grosheva M, Angelov DN. Experimental Studies on Facial Nerve Regeneration. Anat Rec (Hoboken) 2019; 302:1287-1303. [DOI: 10.1002/ar.24123] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 10/09/2018] [Accepted: 11/02/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Svenja Rink
- Department of Prosthetic Dentistry, School of Dental and Oral MedicineUniversity of Cologne Cologne Germany
| | - Habib Bendella
- Department of NeurosurgeryUniversity of Witten/Herdecke, Cologne Merheim Medical Center (CMMC) Cologne Germany
| | - Salih Murat Akkin
- Department of Anatomy, School of MedicineSANKO University Gaziantep Turkey
| | - Marilena Manthou
- Department of Histology and EmbryologyAristotle University Thessaloniki Thessaloniki Greece
| | - Maria Grosheva
- Department of Oto‐Rhino‐LaryngologyUniversity of Cologne Cologne Germany
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24
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McGregor CE, English AW. The Role of BDNF in Peripheral Nerve Regeneration: Activity-Dependent Treatments and Val66Met. Front Cell Neurosci 2019; 12:522. [PMID: 30687012 PMCID: PMC6336700 DOI: 10.3389/fncel.2018.00522] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 12/14/2018] [Indexed: 11/29/2022] Open
Abstract
Despite the ability of peripheral nerves to spontaneously regenerate after injury, recovery is generally very poor. The neurotrophins have emerged as an important modulator of axon regeneration, particularly brain derived neurotrophic factor (BDNF). BDNF regulation and signaling, as well as its role in activity-dependent treatments including electrical stimulation, exercise, and optogenetic stimulation are discussed here. The importance of a single nucleotide polymorphism in the BDNF gene, Val66Met, which is present in 30% of the human population and may hinder the efficacy of these treatments in enhancing regeneration after injury is considered. Preliminary data are presented on the effectiveness of one such activity-dependent treatment, electrical stimulation, in enhancing axon regeneration in mice expressing the met allele of the Val66Met polymorphism.
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Affiliation(s)
- Claire Emma McGregor
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, United States
| | - Arthur W English
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, United States
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Bendella H, Rink S, Grosheva M, Sarikcioglu L, Gordon T, Angelov DN. Putative roles of soluble trophic factors in facial nerve regeneration, target reinnervation, and recovery of vibrissal whisking. Exp Neurol 2017; 300:100-110. [PMID: 29104116 DOI: 10.1016/j.expneurol.2017.10.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 10/25/2017] [Accepted: 10/30/2017] [Indexed: 12/15/2022]
Abstract
It is well-known that, after nerve transection and surgical repair, misdirected regrowth of regenerating motor axons may occur in three ways. The first way is that the axons enter into endoneurial tubes that they did not previously occupy, regenerate through incorrect fascicles and reinnervate muscles that they did not formerly supply. Consequently the activation of these muscles results in inappropriate movements. The second way is that, in contrast with the precise target-directed pathfinding by elongating motor nerves during embryonic development, several axons rather than a single axon grow out from each transected nerve fiber. The third way of misdirection occurs by the intramuscular terminal branching (sprouting) of each regenerating axon to culminate in some polyinnervation of neuromuscular junctions, i.e. reinnervation of junctions by more than a single axon. Presently, "fascicular" or "topographic specificity" cannot be achieved and hence target-directed nerve regeneration is, as yet, unattainable. Nonetheless, motor and sensory reinnervation of appropriate endoneurial tubes does occur and can be promoted by brief nerve electrical stimulation. This review considers the expression of neurotrophic factors in the neuromuscular system and how this expression can promote functional recovery, with emphasis on the whisking of vibrissae on the rat face in relationship to the expression of the factors. Evidence is reviewed for a role of neurotrophic factors as short-range diffusible sprouting stimuli in promoting complete functional recovery of vibrissal whisking in blind Sprague Dawley (SD)/RCS rats but not in SD rats with normal vision, after facial nerve transection and surgical repair. Briefly, a complicated time course of growth factor expression in the nerves and denervated muscles include (1) an early increase in FGF2 and IGF2, (2) reduced NGF between 2 and 14days after nerve transection and surgical repair, (3) a late rise in BDNF and (4) reduced IGF1 protein in the denervated muscles at 28days. These findings suggest that recovery of motor function after peripheral nerve injury is due, at least in part, to a complex regulation of nerve injury-associated neurotrophic factors and cytokines at the neuromuscular junctions of denervated muscles. In particular, the increase of FGF2 and concomittant decrease of NGF during the first week after facial nerve-nerve anastomosis in SD/RCS blind rats may prevent intramuscular axon sprouting and, in turn, reduce poly-innervation of the neuromuscular junction.
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Affiliation(s)
- Habib Bendella
- Department of Neurosurgery, University of Witten/Herdecke, Cologne Merheim Medical Center (CMMC), Cologne, Germany
| | - Svenja Rink
- Department of Prosthetic Dentistry, School of Dental and Oral Medicine, University of Cologne, Germany
| | - Maria Grosheva
- Department of Oto-Rhino-Laryngology, University of Cologne, Germany
| | | | - Tessa Gordon
- Department of Surgery, The Hospital for Sick Children, Toronto, Ontario M5G 1X8, Canada
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Grosheva M, Rink S, Jansen R, Bendella H, Pavlov SP, Sarikcioglu L, Angelov DN, Dunlop SA. Early and continued manual stimulation is required for long‐term recovery after facial nerve injury. Muscle Nerve 2017; 57:100-106. [DOI: 10.1002/mus.25613] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 02/03/2017] [Accepted: 02/14/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Maria Grosheva
- Department of Oto‐Rhino‐LaryngologyUniversity of CologneCologne Germany
| | - Svenja Rink
- Anatomical Institute IUniversity of CologneJoseph‐Stelzmann‐Strasse 9, D‐50924Köln Germany
| | - Ramona Jansen
- Anatomical Institute IUniversity of CologneJoseph‐Stelzmann‐Strasse 9, D‐50924Köln Germany
| | - Habib Bendella
- Department of NeurosurgeryUniversity of Witten/HerdeckeCologne Merheim Medical Center, Cologne Germany
| | | | - Levent Sarikcioglu
- Department of AnatomyAkdeniz University Faculty of MedicineAntalya Turkey
| | - Doychin N. Angelov
- Anatomical Institute IUniversity of CologneJoseph‐Stelzmann‐Strasse 9, D‐50924Köln Germany
| | - Sarah A. Dunlop
- Experimental and Regenerative Neuroscience, School of Biological SciencesThe University of Western AustraliaCrawley Western Australia Australia
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Chen P, Knox CJ, Yao L, Li C, Hadlock TA. The effects of venous ensheathment on facial nerve repair in the rat. Laryngoscope 2017; 127:1558-1564. [PMID: 28224625 DOI: 10.1002/lary.26501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 12/25/2016] [Accepted: 12/28/2016] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To investigate the protective effect of autologous venous ensheathment on sutured rat facial nerve and to test whether the ensheathment could improve the functional recovery of repaired nerve and accuracy of axonal growth. STUDY DESIGN In vivo study. METHODS Forty-six rats were examined, with six rats serving as normal controls and 40 receiving facial nerve transection and suture repair (SR) or transection and suture repair with an additional venous ensheathment (VE). The rats were then subjected to functional testing, histological assessment of nerve specimens, or retrograde tracing, respectively. RESULTS At the postoperative day (POD) 60, the venous ensheathment showed no adhesion at the surrounding tissues. No significant difference in neuroma formation was found between the two surgical manipulations (SR and VE groups) (P < 0.05). Retrogradely labeled motoneurons in facial nuclei were extremely disorganized after the facial nerve undertook surgical manipulation. In all manipulated groups, double retrogradely labeled neurons, indicative of aberrant axonal branching during regeneration, could be observed after peripheral manipulation across all time points. With the two facial surgical manipulations, the average count of double-labeled neurons at POD 60 was significantly less than at POD 21 (P < 0.05). CONCLUSION Autologous venous ensheathment could not help with the functional recovery of facial nerve or improve the accuracy of axonal regeneration. Further studies are warranted to elucidate the effects of venous ensheathment in other motor and sensory nerve models. LEVEL OF EVIDENCE NA. Laryngoscope, 127:1558-1564, 2017.
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Affiliation(s)
- Pei Chen
- Department of Otolaryngology, Massachusetts Eye and Ear Infirmary and Harvard Medical School, Boston, Massachusetts, U.S.A.,Department of Otolaryngology, Wuhan Integrated TCM and Western Medicine Hospital (Wuhan No.1 Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Christopher J Knox
- Department of Otolaryngology, Massachusetts Eye and Ear Infirmary and Harvard Medical School, Boston, Massachusetts, U.S.A
| | - Linli Yao
- Department of Otolaryngology, Wuhan Integrated TCM and Western Medicine Hospital (Wuhan No.1 Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Chunli Li
- Department of Otolaryngology, Wuhan Integrated TCM and Western Medicine Hospital (Wuhan No.1 Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Tessa A Hadlock
- Department of Otolaryngology, Massachusetts Eye and Ear Infirmary and Harvard Medical School, Boston, Massachusetts, U.S.A
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KANNECİ ALTINIŞIK İA, KÖK FN, YÜCEL D, TORUN KÖSE G. In vitro evaluation of PLLA/PBS sponges as a promisingbiodegradable scaffold for neural tissue engineering. Turk J Biol 2017. [DOI: 10.3906/biy-1701-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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The Dilator Naris Muscle as a Reporter of Facial Nerve Regeneration in a Rat Model. Ann Plast Surg 2016; 76:94-8. [PMID: 25643189 DOI: 10.1097/sap.0000000000000273] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Many investigators study facial nerve regeneration using the rat whisker pad model, although widely standardized outcomes measures of facial nerve regeneration in the rodent have not yet been developed. The intrinsic whisker pad "sling" muscles producing whisker protraction, situated at the base of each individual whisker, are extremely small and difficult to study en bloc. Here, we compare the functional innervation of 2 potential reporter muscles for whisker pad innervation: the dilator naris (DN) and the levator labii superioris (LLS), to characterize facial nerve regeneration. METHODS Motor supply of the DN and LLS was elucidated by measuring contraction force and compound muscle action potentials during stimulation of individual facial nerve branches, and by measuring whisking amplitude before and after DN distal tendon release. RESULTS The pattern of DN innervation matched that of the intrinsic whisker pad musculature (ie, via the buccal and marginal mandibular branches of the facial nerve), whereas the LLS seemed to be innervated almost entirely by the zygomatic branch, whose primary target is the orbicularis oculi muscle. CONCLUSIONS Although the LLS has been commonly used as a reporter muscle of whisker pad innervation, the present data show that its innervation pattern does not overlap substantially with the muscles producing whisker protraction. The DN muscle may serve as a more appropriate reporter for whisker pad innervation because it is innervated by the same facial nerve branches as the intrinsic whisker pad musculature, making structure/function correlations more accurate, and more relevant to investigators studying facial nerve regeneration.
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Dorschner B, Süße H, Ortmann W, Irintchev A, Denzler J, Guntinas-Lichius O. An automated whisker tracking tool for the rat facial nerve injury paradigm. J Neurosci Methods 2016; 271:143-8. [DOI: 10.1016/j.jneumeth.2016.07.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 07/20/2016] [Accepted: 07/21/2016] [Indexed: 10/21/2022]
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Klingner CM, Brodoehl S, Volk GF, Guntinas-Lichius O, Witte OW. Adaptive and Maladaptive Neural Plasticity Due to Facial Nerve Palsy. ZEITSCHRIFT FUR PSYCHOLOGIE-JOURNAL OF PSYCHOLOGY 2016. [DOI: 10.1027/2151-2604/a000244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Abstract. This paper reviews adaptive and maladaptive mechanisms of cortical plasticity in patients suffering from peripheral facial palsy. As the peripheral facial nerve is a pure motor nerve, a facial nerve lesion is causing an exclusive deefferentation without deafferentation. We focus on the question of how the investigation of pure deefferentation adds to our current understanding of brain plasticity which derives from studies on learning and studies on brain lesions. The importance of efference and afference as drivers for cortical plasticity is discussed in addition to the crossmodal influence of different competitive sensory inputs. We make the attempt to integrate the experimental findings of the effects of pure deefferentation within the theoretical framework of cortical responses and predictive coding. We show that the available experimental data can be explained within this theoretical framework which also clarifies the necessity for maladaptive plasticity. Finally, we propose rehabilitation approaches for directing cortical reorganization in the appropriate direction and highlight some challenging questions that are yet unexplored in the field.
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Affiliation(s)
- Carsten M. Klingner
- Hans Berger Department of Neurology, Jena University Hospital – Friedrich Schiller University Jena, Germany
- Biomagnetic Center, Hans Berger Department of Neurology, Jena University Hospital – Friedrich Schiller University Jena, Germany
- Facial Nerve Center Jena, Jena University Hospital – Friedrich Schiller University Jena, Germany
| | - Stefan Brodoehl
- Hans Berger Department of Neurology, Jena University Hospital – Friedrich Schiller University Jena, Germany
- Biomagnetic Center, Hans Berger Department of Neurology, Jena University Hospital – Friedrich Schiller University Jena, Germany
| | - Gerd F. Volk
- Department of Otorhinolaryngology, Jena University Hospital – Friedrich Schiller University Jena, Germany
- Facial Nerve Center Jena, Jena University Hospital – Friedrich Schiller University Jena, Germany
| | - Orlando Guntinas-Lichius
- Department of Otorhinolaryngology, Jena University Hospital – Friedrich Schiller University Jena, Germany
- Facial Nerve Center Jena, Jena University Hospital – Friedrich Schiller University Jena, Germany
| | - Otto W. Witte
- Hans Berger Department of Neurology, Jena University Hospital – Friedrich Schiller University Jena, Germany
- Facial Nerve Center Jena, Jena University Hospital – Friedrich Schiller University Jena, Germany
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Hizay A, Seitz M, Grosheva M, Sinis N, Kaya Y, Bendella H, Sarikcioglu L, Dunlop SA, Angelov DN. FGF-2 is required to prevent astrogliosis in the facial nucleus after facial nerve injury and mechanical stimulation of denervated vibrissal muscles. J Biomed Res 2016; 30:142-148. [PMID: 28276669 PMCID: PMC4820891 DOI: 10.7555/jbr.30.20140042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 11/28/2014] [Accepted: 04/10/2015] [Indexed: 01/20/2023] Open
Abstract
Recently, we have shown that manual stimulation of paralyzed vibrissal muscles after facial-facial anastomosis reduced the poly-innervation of neuromuscular junctions and restored vibrissal whisking. Using gene knock outs, we found a differential dependence of manual stimulation effects on growth factors. Thus, insulin-like growth factor-1 and brain-derived neurotrophic factor are required to underpin manual stimulation-mediated improvements, whereas FGF-2 is not. The lack of dependence on FGF-2 in mediating these peripheral effects prompted us to look centrally, i.e. within the facial nucleus where increased astrogliosis after facial-facial anastomosis follows "synaptic stripping". We measured the intensity of Cy3-fluorescence after immunostaining for glial fibrillary acidic protein (GFAP) as an indirect indicator of synaptic coverage of axotomized neurons in the facial nucleus of mice lacking FGF-2 (FGF-2-/- mice). There was no difference in GFAP-Cy3-fluorescence (pixel number, gray value range 17–103) between intact wildtype mice (2.12± 0.37×107) and their intact FGF-2-/- counterparts (2.12± 0.27×107) nor after facial-facial anastomosis +handling (wildtype: 4.06± 0.32×107; FGF-2-/-: 4.39±0.17×107). However, after facial-facial anastomosis, GFAP-Cy3-fluorescence remained elevated in FGF-2-/--animals (4.54±0.12×107), whereas manual stimulation reduced the intensity of GFAP-immunofluorescence in wild type mice to values that were not significantly different from intact mice (2.63± 0.39×10 ). We conclude that FGF-2 is not required to underpin the beneficial effects of manual stimulation at the neuro-muscular junction, but it is required to minimize astrogliosis in the brainstem and, by implication, restore synaptic coverage of recovering facial motoneurons.
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Affiliation(s)
- Arzu Hizay
- Department of Anatomy, Akdeniz University, Faculty of Medicine, Dumlupinar Bulvari 07058 Kampus, Antalya, Turkey
| | - Mark Seitz
- Department of Anatomy I, University of Cologne, Joseph-Stelzmann-Strasse 9, D-50924 Cologne, FR Germany
| | - Maria Grosheva
- Department of Oto-Rhino-Laryngology, University Hospital Cologne, Joseph-Stelzmann-Strasse 9, D-50924 Cologne, FR Germany
| | - Nektarios Sinis
- Depeartment of Plastic-, Hand- and Reconstructive Microsurgery, Berlin, FR 12249, Germany
| | - Yasemin Kaya
- Department of Anatomy, Akdeniz University, Faculty of Medicine, Dumlupinar Bulvari 07058 Kampus, Antalya, Turkey
| | - Habib Bendella
- Department of Neurosurgery, Hospital Merheim, University of Witten-Herdecke, Ostmerheimer Straße 200, 51109 Cologne, Germany
| | - Levent Sarikcioglu
- Department of Anatomy, Akdeniz University, Faculty of Medicine, Dumlupinar Bulvari 07058 Kampus, Antalya, Turkey
| | - Sarah A Dunlop
- Experimental and Regenerative Neurosciences, School of Animal Biology, University of Western Australia (M092) 35 Stirling Highway, CRAWLEY WA 6009, Australia
| | - Doychin N Angelov
- Department of Anatomy I, University of Cologne, Joseph-Stelzmann-Strasse 9, D-50924 Cologne, FR Germany;
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Navarro X. Functional evaluation of peripheral nerve regeneration and target reinnervation in animal models: a critical overview. Eur J Neurosci 2015; 43:271-86. [PMID: 26228942 DOI: 10.1111/ejn.13033] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 07/15/2015] [Accepted: 07/23/2015] [Indexed: 01/08/2023]
Abstract
Peripheral nerve injuries usually lead to severe loss of motor, sensory and autonomic functions in the patients. Due to the complex requirements for adequate axonal regeneration, functional recovery is often poorly achieved. Experimental models are useful to investigate the mechanisms related to axonal regeneration and tissue reinnervation, and to test new therapeutic strategies to improve functional recovery. Therefore, objective and reliable evaluation methods should be applied for the assessment of regeneration and function restitution after nerve injury in animal models. This review gives an overview of the most useful methods to assess nerve regeneration, target reinnervation and recovery of complex sensory and motor functions, their values and limitations. The selection of methods has to be adequate to the main objective of the research study, either enhancement of axonal regeneration, improving regeneration and reinnervation of target organs by different types of nerve fibres, or increasing recovery of complex sensory and motor functions. It is generally recommended to use more than one functional method for each purpose, and also to perform morphological studies of the injured nerve and the reinnervated targets.
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Affiliation(s)
- Xavier Navarro
- Department of Cell Biology, Physiology and Immunology, Institute of Neurosciences, Universitat Autònoma de Barcelona, E-08193, Bellaterra, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain
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MAEGELE M, BRAUN M, WAFAISADE A, SCHÄFER N, LIPPERT-GRUENER M, KREIPKE C, RAFOLS J, SCHÄFER U, ANGELOV DN, STUERMER E. Long-Term Effects of Enriched Environment on Neurofunctional Outcome and CNS Lesion Volume After Traumatic Brain Injury in Rats. Physiol Res 2015; 64:129-45. [DOI: 10.33549/physiolres.932664] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
To determine whether the exposure to long term enriched environment (EE) would result in a continuous improvement of neurological recovery and ameliorate the loss of brain tissue after traumatic brain injury (TBI) vs. standard housing (SH). Male Sprague-Dawley rats (300-350 g, n=28) underwent lateral fluid percussion brain injury or SHAM operation. One TBI group was held under complex EE for 90 days, the other under SH. Neuromotor and sensorimotor dysfunction and recovery were assessed after injury and at days 7, 15, and 90 via Composite Neuroscore (NS), RotaRod test, and Barnes Circular Maze (BCM). Cortical tissue loss was assessed using serial brain sections. After day 7 EE animals showed similar latencies and errors as SHAM in the BCM. SH animals performed notably worse with differences still significant on day 90 (p<0.001). RotaRod test and NS revealed superior results for EE animals after day 7. The mean cortical volume was significantly higher in EE vs. SH animals (p=0.003). In summary, EE animals after lateral fluid percussion (LFP) brain injury performed significantly better than SH animals after 90 days of recovery. The window of opportunity may be wide and also lends further credibility to the importance of long term interventions in patients suffering from TBI.
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Affiliation(s)
- M. MAEGELE
- Department for Traumatology and Orthopedic Surgery, Cologne-Merheim Medical Center (CMMC), University Witten-Herdecke (Campus Cologne-Merheim), Cologne, Germany
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Banks CA, Knox C, Hunter DA, Mackinnon SE, Hohman MH, Hadlock TA. Long-term functional recovery after facial nerve transection and repair in the rat. J Reconstr Microsurg 2015; 31:210-6. [PMID: 25629206 DOI: 10.1055/s-0034-1395940] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
BACKGROUND The rodent model is commonly used to study facial nerve injury. Because of the exceptional regenerative capacity of the rodent facial nerve, it is essential to consider the timing when studying facial nerve regeneration and functional recovery. Short-term functional recovery data following transection and repair of the facial nerve has been documented by our laboratory. However, because of the limitations of the head fixation device, there is a lack of long-term data following facial nerve injury. The objective of this study was to elucidate the long-term time course and functional deficit following facial nerve transection and repair in a rodent model. METHODS Adult rats were divided into group 1 (controls) and group 2 (experimental). Group 1 animals underwent head fixation, followed by a facial nerve injury, and functional testing was performed from day 7 to day 70. Group 2 animals underwent facial nerve injury, followed by delayed head fixation, and then underwent functional testing from months 6 to 8. RESULTS There was no statistical difference between the average whisking amplitudes in group 1 and group 2 animals. CONCLUSION Functional whisking recovery 6 months after facial nerve injury is comparable to recovery within 1 to 4 months of transection and repair, thus the ideal window for evaluating facial nerve recovery falls within the 4 months after injury.
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Affiliation(s)
- Caroline A Banks
- Department of Otolaryngology/Head and Neck Surgery Harvard Medical School/Massachusetts Eye and Ear Infirmary Boston, Massachusetts
| | - Christopher Knox
- Department of Otolaryngology/Head and Neck Surgery Harvard Medical School/Massachusetts Eye and Ear Infirmary Boston, Massachusetts
| | - Daniel A Hunter
- Department of Plastic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Susan E Mackinnon
- Department of Surgery, Washington University in St. Louis, St. Louis, Missouri
| | - Marc H Hohman
- Department of Otolaryngology/Head and Neck Surgery Harvard Medical School/Massachusetts Eye and Ear Infirmary Boston, Massachusetts
| | - Tessa A Hadlock
- Department of Otolaryngology, Facial Nerve Center, Mass Eye and Ear Infirmary, Boston, Massachusetts
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Grehl S, Viola HM, Fuller-Carter PI, Carter KW, Dunlop SA, Hool LC, Sherrard RM, Rodger J. Cellular and Molecular Changes to Cortical Neurons Following Low Intensity Repetitive Magnetic Stimulation at Different Frequencies. Brain Stimul 2015; 8:114-23. [DOI: 10.1016/j.brs.2014.09.012] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2014] [Revised: 09/05/2014] [Accepted: 09/21/2014] [Indexed: 10/24/2022] Open
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Haidarliu S, Kleinfeld D, Deschênes M, Ahissar E. The Musculature That Drives Active Touch by Vibrissae and Nose in Mice. Anat Rec (Hoboken) 2014; 298:1347-58. [PMID: 25408106 DOI: 10.1002/ar.23102] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 10/21/2014] [Accepted: 10/26/2014] [Indexed: 11/06/2022]
Abstract
Coordinated action of facial muscles during whisking, sniffing, and touching objects is an important component of active sensing in rodents. Accumulating evidence suggests that the anatomical schemes that underlie active sensing are similar across the majority of whisking rodents. Intriguingly, however, muscle architecture in the mystacial pad of the mouse was reported to be different, possessing only one extrinsic vibrissa protracting muscle (M. nasalis) in the rostral part of the snout. In this study, the organization of the muscles that move the nose and the mystacial vibrissae in mice was re-examined and compared with that reported previously in other rodents. We found that muscle distribution within the mystacial pad and around the tip of the nose in mice is isomorphic with that found in other whisking rodents. In particular, in the rostral part of the mouse snout, we describe both protractors and retractors of the vibrissae. Nose movements are controlled by the M. dilator nasi and five subunits of the M. nasolabialis profundus, with involvement of the nasal cartilaginous skeleton as a mediator in the muscular effort translation.
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Affiliation(s)
- Sebastian Haidarliu
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
| | - David Kleinfeld
- Department of Physics and Section of Neurobiology, University of California at San Diego, La Jolla, California
| | - Martin Deschênes
- Department of Psychiatry and Neuroscience, Faculty of Medicine, Laval University, Québec City, Canada
| | - Ehud Ahissar
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
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Kleiss IJ, Knox CJ, Malo JS, Marres HAM, Hadlock TA, Heaton JT. Whisking recovery after automated mechanical stimulation during facial nerve regeneration. JAMA FACIAL PLAST SU 2014; 16:133-9. [PMID: 24407357 DOI: 10.1001/jamafacial.2013.2217] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
IMPORTANCE Recovery from facial nerve transection is typically poor, but daily mechanical stimulation of the face in rats has been reported to remarkably enhance functional recovery after facial nerve transection and suture repair. This phenomenon needs additional investigation because of its important clinical implications. OBJECTIVE To determine whether automated mechanical stimulation of the whisker pad improves whisking recovery after facial nerve transection and repair in a rat model. DESIGN AND SETTING Sixty-one rats underwent unilateral facial nerve transection and suture repair and were randomized into 8 groups. Six groups received daily automated whisker or whisker pad mechanical stimulation including 0.5-, 1.5-, and 8.0-Hz patterns. Two control groups received restraint without stimulation. Treatment started on postoperative day 8, occurred 5 days per week, and lasted throughout 15 weeks of recovery. Whisking amplitude, velocity, and acceleration were quantified weekly for 15 weeks. INTERVENTIONS Unilateral facial nerve transection, suture repair, and, for 6 groups, daily automated whisker or whisker pad mechanical stimulation. MAIN OUTCOMES AND MEASURES Quantification of whisking amplitude, velocity, and acceleration. RESULTS Rats receiving the low frequencies of stimulation of the whiskers or whisker pad did not demonstrate enhanced whisking recovery, and rats receiving stimulation at 8.0 Hz showed significantly worse whisking recovery compared with controls and previously published groups receiving lower dose manual stimulation. CONCLUSIONS AND RELEVANCE Although daily manual whisker pad stimulation has been shown to enhance whisking recovery, rats in this study did not demonstrate improved whisking recovery after automated mechanical stimulation across a wide range of driving frequencies. Moreover, faster stimulation (8.0 Hz) was actually detrimental to recovery. Further work is needed to understand the relationship between stimulation patterns and the physiologic mechanisms underlying improved or worsened functional outcomes after facial nerve transection and repair.
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Affiliation(s)
- Ingrid J Kleiss
- Department of Otolaryngology/Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Boston3Department of Otorhinolaryngology/Head and Neck Surgery, Radboud University Nijmegen Medical Center, Nijmegen, the Netherlands
| | - Christopher J Knox
- Department of Otolaryngology/Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Boston
| | - Juan S Malo
- Department of Otolaryngology/Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Boston
| | - Henri A M Marres
- Department of Otorhinolaryngology/Head and Neck Surgery, Radboud University Nijmegen Medical Center, Nijmegen, the Netherlands
| | - Tessa A Hadlock
- Department of Otolaryngology/Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Boston
| | - James T Heaton
- Department of Surgery, Massachusetts General Hospital, Boston
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Ozsoy U, Demirel BM, Hizay A, Ozsoy O, Ankerne J, Angelova S, Sarikcioglu L, Ucar Y, Turhan M, Dunlop S, Angelov DN. Manual stimulation of the whisker pad after hypoglossal–facial anastomosis (HFA) using a Y-tube conduit does not improve recovery of whisking function. Exp Brain Res 2014; 232:2021-33. [DOI: 10.1007/s00221-014-3892-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Accepted: 02/24/2014] [Indexed: 12/19/2022]
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Haidarliu S, Kleinfeld D, Ahissar E. Mediation of muscular control of rhinarial motility in rats by the nasal cartilaginous skeleton. Anat Rec (Hoboken) 2013; 296:1821-32. [PMID: 24249396 PMCID: PMC4157211 DOI: 10.1002/ar.22822] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 08/29/2013] [Indexed: 11/12/2022]
Abstract
The rhinarium is the rostral-most area of the snout that surrounds the nostrils, and is hairless in most mammals. In rodents, it participates in coordinated behaviors, active tactile sensing, and active olfactory sensing. In rats, the rhinarium is firmly connected to the nasal cartilages, and its motility is determined by movements of the rostral end of the nasal cartilaginous skeleton (NCS). Here, we demonstrate the nature of different cartilaginous regions that form the rhinarium and the nasofacial muscles that deform these regions during movements of the NCS. These muscles, together with the dorsal nasal cartilage that is described here, function as a rhinarial motor plant.
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Affiliation(s)
- Sebastian Haidarliu
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
| | - David Kleinfeld
- Department of Physics and Section of Neurobiology, University of California at San Diego, La Jolla, CA 92093, USA
| | - Ehud Ahissar
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
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Hadlock TA, Kim SW, Weinberg JS, Knox CJ, Hohman MH, Heaton JT. Quantitative analysis of muscle histologic method in rodent facial nerve injury. JAMA FACIAL PLAST SU 2013; 15:141-6. [PMID: 23329158 DOI: 10.1001/jamafacial.2013.430] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
OBJECTIVE To describe denervation features of facial musculature following facial nerve injury in a rodent model. METHODS Six Wistar-Hannover rats underwent unilateral transection and immediate repair of the facial nerve. After 8 weeks, muscular bundles consisting of dilator naris and levator labii superioris from both sides were analyzed for mean muscle cell diameter and the percentage of muscle cell cross-sectional area using image processing software. The atrophic features of facial muscles were quantified and compared with the contralateral, healthy side of the face. RESULTS Weekly postoperative whisking assessment demonstrated the anticipated course of recovery. We observed significant differences between the normal side and the manipulated side, respectively, in the percentage of muscle specimen cross-sectional area attributable to muscle cell profiles (57% vs 29%; P = .006) and total fiber counts (1346 vs 794; P = .02). The mean cross-sectional area of individual muscle fibers was higher on the normal side (1129 vs 928 μm2; P = .39); however, this difference was statistically nonsignificant. CONCLUSION The objective, quantitative measures of muscle microstructure used in this report provide a valuable point of comparison for whisking function and electrophysiologic measures and can be used in future studies to assess muscle atrophic features associated with facial nerve injury and repair techniques.
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Affiliation(s)
- Tessa A Hadlock
- Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, 243 Charles St, Boston, MA 02114, USA.
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Abstract
Facial nerve trauma can be a devastating injury resulting in functional deficits and psychological distress. Deciding on the optimal course of treatment for patients with traumatic facial nerve injuries can be challenging, as there are many critical factors to be considered for each patient. Choosing from the great array of therapeutic options available can become overwhelming to both patients and physicians, and in this article, the authors present a systematic approach to help organize the physician's thought process.
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Affiliation(s)
- Linda N Lee
- Department of Otolaryngology Head and Neck Surgery, 601 North Caroline Street, 6(th) Floor, Johns Hopkins Outpatient Center, Baltimore, MD 21287, USA
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Hundeshagen G, Szameit K, Thieme H, Finkensieper M, Angelov D, Guntinas-Lichius O, Irintchev A. Deficient functional recovery after facial nerve crush in rats is associated with restricted rearrangements of synaptic terminals in the facial nucleus. Neuroscience 2013; 248:307-18. [DOI: 10.1016/j.neuroscience.2013.06.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 05/21/2013] [Accepted: 06/13/2013] [Indexed: 01/18/2023]
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Ishida T, Yabushita T, Ono T. Functional reversibility of temporomandibular joint mechanoreceptors. Arch Oral Biol 2013; 58:1078-83. [DOI: 10.1016/j.archoralbio.2013.01.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2012] [Revised: 01/31/2013] [Accepted: 01/31/2013] [Indexed: 10/27/2022]
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Optimal Management of Acute Recurrent Laryngeal Nerve Injury During Thyroidectomy. CURRENT OTORHINOLARYNGOLOGY REPORTS 2013. [DOI: 10.1007/s40136-013-0020-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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de Fourmestraux C, Tessier C, Touzot-Jourde G. Multimodal therapy including electroacupuncture for the treatment of facial nerve paralysis in a horse. EQUINE VET EDUC 2013. [DOI: 10.1111/eve.12042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- C. de Fourmestraux
- Surgery Department; Equine Clinic; ONIRIS, Nantes-Atlantique, National College of Veterinary Medicine, Food Science and Engineering; Nantes France
| | - C. Tessier
- Surgery Department; Equine Clinic; ONIRIS, Nantes-Atlantique, National College of Veterinary Medicine, Food Science and Engineering; Nantes France
| | - G. Touzot-Jourde
- Surgery Department; Equine Clinic; ONIRIS, Nantes-Atlantique, National College of Veterinary Medicine, Food Science and Engineering; Nantes France
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Raslan A, Ernst P, Werle M, Thieme H, Szameit K, Finkensieper M, Guntinas-Lichius O, Irintchev A. Reduced cholinergic and glutamatergic synaptic input to regenerated motoneurons after facial nerve repair in rats: potential implications for recovery of motor function. Brain Struct Funct 2013; 219:891-909. [DOI: 10.1007/s00429-013-0542-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2012] [Accepted: 03/12/2013] [Indexed: 02/02/2023]
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Heaton JT, Knox CJ, Malo JS, Kobler JB, Hadlock TA. A system for delivering mechanical stimulation and robot-assisted therapy to the rat whisker pad during facial nerve regeneration. IEEE Trans Neural Syst Rehabil Eng 2013; 21:928-37. [PMID: 23475376 DOI: 10.1109/tnsre.2013.2244911] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Functional recovery is typically poor after facial nerve transection and surgical repair. In rats, whisking amplitude remains greatly diminished after facial nerve regeneration, but can recover more completely if the whiskers are periodically mechanically stimulated during recovery. Here we present a robotic "whisk assist" system for mechanically driving whisker movement after facial nerve injury. Movement patterns were either preprogrammed to reflect natural amplitudes and frequencies, or movements of the contralateral (healthy) side of the face were detected and used to control real-time mirror-like motion on the denervated side. In a pilot study, 20 rats were divided into nine groups and administered one of eight different whisk assist driving patterns (or control) for 5-20 minutes, five days per week, across eight weeks of recovery after unilateral facial nerve cut and suture repair. All rats tolerated the mechanical stimulation well. Seven of the eight treatment groups recovered average whisking amplitudes that exceeded controls, although small group sizes precluded statistical confirmation of group differences. The potential to substantially improve facial nerve recovery through mechanical stimulation has important clinical implications, and we have developed a system to control the pattern and dose of stimulation in the rat facial nerve model.
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Skouras E, Pavlov S, Bendella H, Angelov DN. Materials and Methods. STIMULATION OF TRIGEMINAL AFFERENTS IMPROVES MOTOR RECOVERY AFTER FACIAL NERVE INJURY 2013. [DOI: 10.1007/978-3-642-33311-8_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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Results. STIMULATION OF TRIGEMINAL AFFERENTS IMPROVES MOTOR RECOVERY AFTER FACIAL NERVE INJURY 2013. [DOI: 10.1007/978-3-642-33311-8_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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