Chapter title |
Corticospinal transmission after voluntary contractions.
|
---|---|
Chapter number | 49 |
Book title |
Sensorimotor Control of Movement and Posture
|
Published in |
Advances in experimental medicine and biology, January 2002
|
DOI | 10.1007/978-1-4615-0713-0_49 |
Pubmed ID | |
Book ISBNs |
978-1-4613-5206-8, 978-1-4615-0713-0
|
Authors |
Taylor, Janet L, Petersen, Nicolas T, Butler, Jane E, Gandevia, Simon, Gandevia, Simon C, Refshauge, Kathyrn M, Collins, David F, Wardman, Daniel L, Fitzpatrick, Richard C, Wise, Andrew K, Fallon, James B, McNulty, Penelope, Macefiel, Vaughan, Miles, Timothy S, Nordstrom, Michael A, Janet L. Taylor, Nicolas T. Petersen, Jane E. Butler, Simon Gandevia, Taylor, Janet L., Petersen, Nicolas T., Butler, Jane E. |
Abstract |
Transmastoid stimulation in human subjects evokes a single descending volley in corticospinal axons. Electromyographic (EMG) responses to transmastoid stimuli measured in the relaxed elbow flexor muscles after a maximal voluntary contraction (MVC) are depressed by approximately 50% compared to prior to the MVC. The depression recovers over 2 min. Responses can also be depressed in the relaxed muscle after submaximal contractions and when measured during weak contractions after an MVC. The depression may reflect a decrease in efficacy at the corticospinal-motoneuronal synapse. If so, an activity-dependent decrease in the effectiveness of cortical drive to the motoneurones could affect the control of many voluntary movements. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 11 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Professor | 2 | 18% |
Researcher | 2 | 18% |
Student > Doctoral Student | 1 | 9% |
Student > Bachelor | 1 | 9% |
Student > Master | 1 | 9% |
Other | 3 | 27% |
Unknown | 1 | 9% |
Readers by discipline | Count | As % |
---|---|---|
Neuroscience | 4 | 36% |
Sports and Recreations | 2 | 18% |
Social Sciences | 1 | 9% |
Medicine and Dentistry | 1 | 9% |
Unknown | 3 | 27% |