Parkinsonian Rigidity Depends on the Velocity of Passive Joint Movement
Background. It has been long believed that Parkinsonian rigidity is not velocity-dependent based on the neurological examination. However, this has not been verified scientifically. Methods. The elbow joints of 20 Parkinson’s disease patients were passively flexed and extended, and two characteristi...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Parkinson's Disease |
| Online Access: | http://dx.doi.org/10.1155/2015/961790 |
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| _version_ | 1832561796501733376 |
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| author | Takuyuki Endo Naoya Yoshikawa Harutoshi Fujimura Saburo Sakoda |
| author_facet | Takuyuki Endo Naoya Yoshikawa Harutoshi Fujimura Saburo Sakoda |
| author_sort | Takuyuki Endo |
| collection | DOAJ |
| description | Background. It has been long believed that Parkinsonian rigidity is not velocity-dependent based on the neurological examination. However, this has not been verified scientifically. Methods. The elbow joints of 20 Parkinson’s disease patients were passively flexed and extended, and two characteristic values, the elastic coefficient (elasticity) and the difference in bias (difference in torque measurements for extension and flexion), were identified from a plot of the angle and torque characteristics. Flexion and extension were done at two different velocities, 60°/s and 120°/s, and a statistical analysis was performed to determine whether the changes in these characteristic values were velocity-dependent. Results. The elastic coefficient was not velocity-dependent, but the difference in bias increased in a velocity-dependent manner (P=0.0017). Conclusions. The features of rigidity may differ from the conventional definition, which states that they are not dependent on the velocity of joint movement. |
| format | Article |
| id | doaj-art-c5091ff068b848dda78408e72c3a1abd |
| institution | Kabale University |
| issn | 2090-8083 2042-0080 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Parkinson's Disease |
| spelling | doaj-art-c5091ff068b848dda78408e72c3a1abd2025-02-03T01:24:17ZengWileyParkinson's Disease2090-80832042-00802015-01-01201510.1155/2015/961790961790Parkinsonian Rigidity Depends on the Velocity of Passive Joint MovementTakuyuki Endo0Naoya Yoshikawa1Harutoshi Fujimura2Saburo Sakoda3Department of Neurology, Toneyama National Hospital, 5-1-1 Toneyama, Toyonaka, Osaka 560-8552, JapanGraduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, JapanDepartment of Neurology, Toneyama National Hospital, 5-1-1 Toneyama, Toyonaka, Osaka 560-8552, JapanDepartment of Neurology, Toneyama National Hospital, 5-1-1 Toneyama, Toyonaka, Osaka 560-8552, JapanBackground. It has been long believed that Parkinsonian rigidity is not velocity-dependent based on the neurological examination. However, this has not been verified scientifically. Methods. The elbow joints of 20 Parkinson’s disease patients were passively flexed and extended, and two characteristic values, the elastic coefficient (elasticity) and the difference in bias (difference in torque measurements for extension and flexion), were identified from a plot of the angle and torque characteristics. Flexion and extension were done at two different velocities, 60°/s and 120°/s, and a statistical analysis was performed to determine whether the changes in these characteristic values were velocity-dependent. Results. The elastic coefficient was not velocity-dependent, but the difference in bias increased in a velocity-dependent manner (P=0.0017). Conclusions. The features of rigidity may differ from the conventional definition, which states that they are not dependent on the velocity of joint movement.http://dx.doi.org/10.1155/2015/961790 |
| spellingShingle | Takuyuki Endo Naoya Yoshikawa Harutoshi Fujimura Saburo Sakoda Parkinsonian Rigidity Depends on the Velocity of Passive Joint Movement Parkinson's Disease |
| title | Parkinsonian Rigidity Depends on the Velocity of Passive Joint Movement |
| title_full | Parkinsonian Rigidity Depends on the Velocity of Passive Joint Movement |
| title_fullStr | Parkinsonian Rigidity Depends on the Velocity of Passive Joint Movement |
| title_full_unstemmed | Parkinsonian Rigidity Depends on the Velocity of Passive Joint Movement |
| title_short | Parkinsonian Rigidity Depends on the Velocity of Passive Joint Movement |
| title_sort | parkinsonian rigidity depends on the velocity of passive joint movement |
| url | http://dx.doi.org/10.1155/2015/961790 |
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