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苗 欣, 黄 红, 胡 晓, 时 会, 任 爽, 敖 英. [Changes of electroencephalography power spectrum during joint position perception test after anterior cruciate ligament rupture]. Beijing Da Xue Xue Bao Yi Xue Ban 2021; 53:871-876. [PMID: 34650287 PMCID: PMC8517662 DOI: 10.19723/j.issn.1671-167x.2021.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Indexed: 06/13/2023]
Abstract
OBJECTIVE To measure the electroencephalography (EEG) of the patients with anterior cruciate ligament (ACL) rupture when performing joint position perception movement task, to compare the differences between the ACL rupture side and the unaffected side, to identify the EEG change in the power spectrum caused by the ACL rupture, and to provide evidence for the diagnosis, treatment and rehabi-litation for ACL injury as well as knee instability. METHODS Sixteen male patients, selected from the Department of Sports Medicine, Peking University Third Hospital from November 2014 to April 2015, with only ACL rupture on one side used isokinetic muscle strength testing equipment were enrolled in the study to perform unilateral active knee joint positional movement and passive knee joint positional movement tasks. EEG was recorded to compare between the affected and unaffected limb of ACL rupture patients when doing single leg movement tasks, including passive knee joint position test and active knee joint position sensation test. The target position of the active knee joint position movement task and the passive knee joint position movement task was 30 degrees of knee flexion. RESULTS During the passive knee joint position test, there was no significant difference in EEG power spectrum of Delta[F (1, 15)=0.003, P=0.957, ηP2 =0.001], Theta[F (1, 15)=0.002, P=0.962, ηP2 < 0.001], Alpha[F (1, 15)=0.002, P=0.966, ηP2 =0.001], Beta[F (1, 15)=0.008, P=0.929, ηP2 =0.001] at Fz, Cz, and Pz between the affected and unaffected limbs in the ACL patients. During the active knee joint position movement task, the EEG power spectrum of Delta, Theta, Alpha, Beta at Fz and Cz location, on the affected side was significant higher than on the unaffected side. CONCLUSION This study compared the differences between the ACL rupture side and the unaffected side during active knee position movement task and passive knee position movement task, and identifyied the EEG changes in the power spectrum caused by the ACL rupture, It was found that the central changes caused by unilateral ACL rupture still existed during contralateral (unaffected) side movement. The EEG power spectrum of the affected side during active exercise was significantly higher than that of the unaffected side This study provides new electrophysiological evidence for the study of ACL injury.
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Affiliation(s)
- 欣 苗
- />北京大学第三医院运动医学科, 北京大学运动医学研究所, 运动医学关节伤病北京市重点实验室, 北京 100191Department of Sports Medicine, Peking University Third Hospital, Institute of Sports Medicine of Peking University, Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 红拾 黄
- />北京大学第三医院运动医学科, 北京大学运动医学研究所, 运动医学关节伤病北京市重点实验室, 北京 100191Department of Sports Medicine, Peking University Third Hospital, Institute of Sports Medicine of Peking University, Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 晓青 胡
- />北京大学第三医院运动医学科, 北京大学运动医学研究所, 运动医学关节伤病北京市重点实验室, 北京 100191Department of Sports Medicine, Peking University Third Hospital, Institute of Sports Medicine of Peking University, Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 会娟 时
- />北京大学第三医院运动医学科, 北京大学运动医学研究所, 运动医学关节伤病北京市重点实验室, 北京 100191Department of Sports Medicine, Peking University Third Hospital, Institute of Sports Medicine of Peking University, Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 爽 任
- />北京大学第三医院运动医学科, 北京大学运动医学研究所, 运动医学关节伤病北京市重点实验室, 北京 100191Department of Sports Medicine, Peking University Third Hospital, Institute of Sports Medicine of Peking University, Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 英芳 敖
- />北京大学第三医院运动医学科, 北京大学运动医学研究所, 运动医学关节伤病北京市重点实验室, 北京 100191Department of Sports Medicine, Peking University Third Hospital, Institute of Sports Medicine of Peking University, Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
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敖 明, 李 学, 于 媛, 时 会, 黄 红, 敖 英, 王 薇. [Effects of visual restoration on dynamic plantar pressure features in elder individuals]. Beijing Da Xue Xue Bao Yi Xue Ban 2021; 53:907-914. [PMID: 34650293 PMCID: PMC8517682 DOI: 10.19723/j.issn.1671-167x.2021.05.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Indexed: 06/13/2023]
Abstract
OBJECTIVE To analyze the effects of visual restoration after cataract surgery on plantar pressure and biomechanics of foot in elder individuals. METHODS Thirty-two patients [male/female 5/27, (70.1±5.2) years old] with age-related cataract were recruited between October 2016 and December 2019. The footscan system was employed to record the data of plantar pressure during level walking before and 1-month after the cataract surgery. Parameters of peak pressure (PP), impulse (I), pressure-time integral (PTI) and time to peak pressure (TPP) from the regions of the 1st toe (T1), 2nd to 5th toes (T2-5), 1st to 5th metatarsal heads (M1-M5), midfoot (MF), medial hindfoot (HM) and lateral hindfoot (HL) were analyzed respectively. RESULTS Post-operatively, the visual function was effectively reconstructed with improved visual acuity in both eyes (Z=-4.878, -4.801; P < 0.001). The PP (t=2.266, P=0.031) and I (t=2.152, P=0.039) values in M2 region on the dominant side (right foot) increased statistically at post-operative phase, while the changes of pressure and temporal para-meters in other regions remained stable. There was laterality in plantar pressure at pre-operative phase, manifested as greater PP values in M1, M2, MF, and HM regions on the dominant sides (t=-2.414, -2.478, -2.144, -5.269; P < 0.05), greater PP values in T1, M3, M5 and HL regions on the non-dominant sides (t=4.830, 3.155, 2.686, 3.683; P < 0.05), greater I values in M1, MF, and HM regions on the dominant sides (t=-2.380, -2.185, -5.320; P < 0.05) and greater I values in T1, M3, M5 and HL regions on the non-dominant sides (t=4.489, 2.247, 2.838, 3.992; P < 0.05). post-operatively, the pressure tended to be compatible between the two sides in regions of M3 and MF, while the magnitude of laterality in regions of M1 (ZPP△= -2.721, P=0.007; ZI△=-2.581, P=0.010), M2 (ZPP△=-2.674, P=0.007; ZI△=-2.375, P=0.018) and M5 (ZPP△=1.991, P=0.046; ZI△=2.150, P=0.032) was further increased. CONCLUSION Changes in plantar pressure after cataract surgery were characterized as increased pressure in the 2nd metatarsal head area on the dominant side. Visual restoration might intensify the laterality in the medial of forefoot on the dominant side and the lateral of forefoot on the non-dominant side.
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Affiliation(s)
- 明昕 敖
- 北京大学第三医院眼科, 眼部神经损伤的重建保护与康复北京市重点实验室Department of Ophthalmology, Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing 100191, China
| | - 学民 李
- 北京大学第三医院眼科, 眼部神经损伤的重建保护与康复北京市重点实验室Department of Ophthalmology, Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing 100191, China
| | - 媛媛 于
- 北京大学第三医院运动医学科, 北京大学运动医学研究所, 北京市运动医学关节伤病重点实验室, 北京 100191Department of Sports Medicine, Peking University Third Hospital, Institute of Sports Medicine of Peking University, Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 会娟 时
- 北京大学第三医院运动医学科, 北京大学运动医学研究所, 北京市运动医学关节伤病重点实验室, 北京 100191Department of Sports Medicine, Peking University Third Hospital, Institute of Sports Medicine of Peking University, Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 红拾 黄
- 北京大学第三医院运动医学科, 北京大学运动医学研究所, 北京市运动医学关节伤病重点实验室, 北京 100191Department of Sports Medicine, Peking University Third Hospital, Institute of Sports Medicine of Peking University, Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 英芳 敖
- 北京大学第三医院运动医学科, 北京大学运动医学研究所, 北京市运动医学关节伤病重点实验室, 北京 100191Department of Sports Medicine, Peking University Third Hospital, Institute of Sports Medicine of Peking University, Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 薇 王
- 北京大学第三医院眼科, 眼部神经损伤的重建保护与康复北京市重点实验室Department of Ophthalmology, Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing 100191, China
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任 爽, 时 会, 张 家, 刘 振, 邵 嘉, 朱 敬, 胡 晓, 黄 红, 敖 英. [Finite element analysis of the graft stresses after anterior cruciate ligament reconstruction]. Beijing Da Xue Xue Bao Yi Xue Ban 2021; 53:865-870. [PMID: 34650286 PMCID: PMC8517673 DOI: 10.19723/j.issn.1671-167x.2021.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Indexed: 06/13/2023]
Abstract
OBJECTIVE To explore the stress distribution characteristics of the graft after anterior cruciate ligament (ACL) reconstruction, so as to provide theoretical reference for the surgical plan of ACL reconstruction. METHODS Based on 3D MRI and CT images, finite element models of the uninjured knee joint and knee joint after ACL reconstruction were established in this study. The uninjured knee model included femur, tibia, fibula, medial collateral ligament, lateral collateral ligament, ACL and posterior cruciate ligament. The ACL reconstruction knee model included femur, tibia, fibula, medial collateral ligament, lateral collateral ligament, ACL graft and posterior cruciate ligament. Linear elastic material properties were used for both the uninjured and ACL reconstruction models. The elastic modulus of bone tissue was set as 17 GPa and Poisson' s ratio was 0.36. The material properties of ligament tissue and graft were set as elastic modulus 390 MPa and Poisson's ratio 0.4. The femur was fixed as the boundary condition, and the tibia anterior tension of 134 N was applied as the loading condition. The stress states of the ACL of the intact joint and the ACL graft after reconstruction were solved and analyzed, including tension, pressure, shear force and von Mises stress. RESULTS The maximum compressive stress (6.34 MPa), von Mises stress (5.9 MPa) and shear stress (1.83 MPa) of the reconstructed ACL graft were all at the anterior femoral end. It was consistent with the position of maximum compressive stress (8.77 MPa), von Mises stress (8.88 MPa) and shear stress (3.44 MPa) in the ACL of the intact knee joint. The maximum tensile stress of the graft also appeared at the femoral end, but at the posterior side, which was consistent with the position of the maximum tensile stress of ACL of the uninjured knee joint. More-over, the maximum tensile stress of the graft was only 0.88 MPa, which was less than 2.56 MPa of ACL of the uninjured knee joint. CONCLUSION The maximum compressive stress, von Mises stress and shear stress of the ACL graft are located in the anterior femoral end, and the maximum tensile stress is located in the posterior femoral end, which is consistent with the position of the maximum tensile stress of the ACL of the uninjured knee joint. The anterior part of ACL and the graft bore higher stresses than the posterior part, which is consistent with the biomechanical characteristics of ACL.
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Affiliation(s)
- 爽 任
- />北京大学第三医院运动医学科,北京大学运动医学研究所,运动医学关节伤病北京市重点实验室,北京 100191Department of Sports Medicine, Peking University Third Hospital; Institute of Sports Medicine of Peking University; Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 会娟 时
- />北京大学第三医院运动医学科,北京大学运动医学研究所,运动医学关节伤病北京市重点实验室,北京 100191Department of Sports Medicine, Peking University Third Hospital; Institute of Sports Medicine of Peking University; Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 家豪 张
- />北京大学第三医院运动医学科,北京大学运动医学研究所,运动医学关节伤病北京市重点实验室,北京 100191Department of Sports Medicine, Peking University Third Hospital; Institute of Sports Medicine of Peking University; Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 振龙 刘
- />北京大学第三医院运动医学科,北京大学运动医学研究所,运动医学关节伤病北京市重点实验室,北京 100191Department of Sports Medicine, Peking University Third Hospital; Institute of Sports Medicine of Peking University; Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 嘉艺 邵
- />北京大学第三医院运动医学科,北京大学运动医学研究所,运动医学关节伤病北京市重点实验室,北京 100191Department of Sports Medicine, Peking University Third Hospital; Institute of Sports Medicine of Peking University; Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 敬先 朱
- />北京大学第三医院运动医学科,北京大学运动医学研究所,运动医学关节伤病北京市重点实验室,北京 100191Department of Sports Medicine, Peking University Third Hospital; Institute of Sports Medicine of Peking University; Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 晓青 胡
- />北京大学第三医院运动医学科,北京大学运动医学研究所,运动医学关节伤病北京市重点实验室,北京 100191Department of Sports Medicine, Peking University Third Hospital; Institute of Sports Medicine of Peking University; Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 红拾 黄
- />北京大学第三医院运动医学科,北京大学运动医学研究所,运动医学关节伤病北京市重点实验室,北京 100191Department of Sports Medicine, Peking University Third Hospital; Institute of Sports Medicine of Peking University; Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
| | - 英芳 敖
- />北京大学第三医院运动医学科,北京大学运动医学研究所,运动医学关节伤病北京市重点实验室,北京 100191Department of Sports Medicine, Peking University Third Hospital; Institute of Sports Medicine of Peking University; Beijing Key Laboratory of Sports Injuries, Beijing 100191, China
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侯 宗, 敖 英, 胡 跃, 焦 晨, 郭 秦, 黄 红, 任 爽, 张 思, 谢 兴, 陈 临, 赵 峰, 皮 彦, 李 楠, 江 东. [Characteristics and related factors of plantar pressure in the chronic ankle instability individuals]. Beijing Da Xue Xue Bao Yi Xue Ban 2021; 53:279-285. [PMID: 33879898 PMCID: PMC8072434 DOI: 10.19723/j.issn.1671-167x.2021.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Indexed: 06/12/2023]
Abstract
OBJECTIVE To analyze characteristics and related factors of the plantar pressure during the level walking and single leg standing in the chronic ankle instability (CAI) individuals. METHODS From April 2019, 75 CAI individuals and 40 healthy individuals were enrolled in this study. Both of the static and dynamic plantar pressure were measured during six times level walking and three times single leg standing testing. The data including peak force, time to peak force in various foot contact areas and the time to boundary (TTB) and velocity of center of pressure (COP) were measured and compared between the affected side and the unaffected side and between the CAI cases and the healthy individuals. The correlations between the plantar pressure and the gender, Beighton score, affected side and body mass index (BMI) were analyzed. RESULTS The characteristics of plantar pressure distribution in the CAI individuals included: (1) During the level walking, the affected side showed the similar pressure contribution as the unaffected side (P>0.05). While compared with healthy individuals, there was a significantly higher peak force in the 5th metatarsal area (t=-3.86, P=0.03) of the affected side, lower peak force in the 1st (t=2.99, P=0.02), 2nd metatarsal head areas (t=2.09, P=0.01) of the affected side, medial hindfoot areas of both sides (affected, t=2.33, P=0.01; unaffected, t=3.74, P=0.02) and toes areass of both sides (affected, t=2.23, P=0.01; unaffected, t=3.28, P=0.02) and a delay to peak force in the 4th metatarsal head area (t=3.33, P=0.01) of the affected side. (2) During the single leg standing, the CAI individuals showed significantly worse balance control in the anterior/posterior direction (P < 0.05) and lateral/medial direction (P < 0.05) compared with the healthy controls, and the affected side had more severe balance control deficit in the lateral/medial direction (P < 0.05). (3) The women (P < 0.05) and the individuals with higher Beighton scores (P < 0.05) showed worse balance control deficit in the lateral/medial direction. CONCLUSION CAI individuals showed significantly a more lateral shifted plantar distribution during the level walking compared with the healthy individuals and the tendency was worse on the affected sides, and showed worse balance control in the anterior/posterior direction and lateral/medial direction during the single leg standing. The women and those with generalized ligament laxity showed significantly worse balance control.
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Affiliation(s)
- 宗辰 侯
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
| | - 英芳 敖
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
| | - 跃林 胡
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
| | - 晨 焦
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
| | - 秦炜 郭
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
| | - 红拾 黄
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
| | - 爽 任
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
| | - 思 张
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
| | - 兴 谢
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
| | - 临新 陈
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
| | - 峰 赵
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
| | - 彦斌 皮
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
| | - 楠 李
- 临床流行病学研究中心,北京 100191Research Center of Clinical Epidemiology, Peking University Third Hospital, Beijing 100191, China
| | - 东 江
- 北京大学第三医院运动医学科,北京 100191Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China
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