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Pötter-Nerger M, Reese R, Steigerwald F, Heiden JA, Herzog J, Moll CKE, Hamel W, Ramirez-Pasos U, Falk D, Mehdorn M, Gerloff C, Deuschl G, Volkmann J. Movement-Related Activity of Human Subthalamic Neurons during a Reach-to-Grasp Task. Front Hum Neurosci 2017; 11:436. [PMID: 28936169 PMCID: PMC5594073 DOI: 10.3389/fnhum.2017.00436] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 08/15/2017] [Indexed: 12/31/2022] Open
Abstract
The aim of the study was to record movement-related single unit activity (SUA) in the human subthalamic nucleus (STN) during a standardized motor task of the upper limb. We performed microrecordings from the motor region of the human STN and registered kinematic data in 12 patients with Parkinson’s disease (PD) undergoing deep brain stimulation surgery (seven women, mean age 62.0 ± 4.7 years) while they intraoperatively performed visually cued reach-to-grasp movements using a grip device. SUA was analyzed offline in relation to different aspects of the movement (attention, start of the movement, movement velocity, button press) in terms of firing frequency, firing pattern, and oscillation. During the reach-to-grasp movement, 75/114 isolated subthalamic neurons exhibited movement-related activity changes. The largest proportion of single units showed modulation of firing frequency during several phases of the reach and grasp (polymodal neurons, 45/114), particularly an increase of firing rate during the reaching phase of the movement, which often correlated with movement velocity. The firing pattern (bursting, irregular, or tonic) remained unchanged during movement compared to rest. Oscillatory single unit firing activity (predominantly in the theta and beta frequency) decreased with movement onset, irrespective of oscillation frequency. This study shows for the first time specific, task-related, SUA changes during the reach-to-grasp movement in humans.
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Affiliation(s)
- Monika Pötter-Nerger
- Department of Neurology, Christian-Albrechts-UniversityKiel, Germany.,Department of Neurology, University Hamburg-EppendorfHamburg, Germany
| | - Rene Reese
- Department of Neurology, Christian-Albrechts-UniversityKiel, Germany.,Department of Neurology, University RostockRostock, Germany
| | - Frank Steigerwald
- Department of Neurology, Christian-Albrechts-UniversityKiel, Germany.,Department of Neurology, Julius-Maximilian UniversityWürzburg, Germany
| | - Jan Arne Heiden
- Department of Neurology, Christian-Albrechts-UniversityKiel, Germany
| | - Jan Herzog
- Department of Neurology, Christian-Albrechts-UniversityKiel, Germany
| | - Christian K E Moll
- Department of Neurophysiology, University Hamburg-EppendorfHamburg, Germany
| | - Wolfgang Hamel
- Department of Neurosurgery, University Hamburg-EppendorfHamburg, Germany
| | - Uri Ramirez-Pasos
- Department of Neurology, Julius-Maximilian UniversityWürzburg, Germany
| | - Daniela Falk
- Department of Neurosurgery, Christian-Albrechts-UniversityKiel, Germany
| | | | - Christian Gerloff
- Department of Neurology, University Hamburg-EppendorfHamburg, Germany
| | - Günther Deuschl
- Department of Neurology, Christian-Albrechts-UniversityKiel, Germany
| | - Jens Volkmann
- Department of Neurology, Christian-Albrechts-UniversityKiel, Germany.,Department of Neurology, Julius-Maximilian UniversityWürzburg, Germany
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Normann RA, Fernandez E. Clinical applications of penetrating neural interfaces and Utah Electrode Array technologies. J Neural Eng 2016; 13:061003. [PMID: 27762237 DOI: 10.1088/1741-2560/13/6/061003] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This paper briefly describes some of the recent progress in the development of penetrating microelectrode arrays and highlights the use of two of these devices, Utah electrode arrays and Utah slanted electrode arrays, in two therapeutic interventions: recording volitional skeletal motor commands from the central nervous system, and recording motor commands and evoking somatosensory percepts in the peripheral nervous system (PNS). The paper also briefly explores other potential sites for microelectrode array interventions that could be profitably pursued and that could have important consequences in enhancing the quality of life of patients that has been compromised by disorders of the central and PNSs.
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Affiliation(s)
- Richard A Normann
- Departments of Bioengineering and Ophthalmology, University of Utah, Salt Lake City, UT 84112, USA
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