期刊
JOURNAL OF MOTOR BEHAVIOR
卷 40, 期 2, 页码 165-173出版社
ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
DOI: 10.3200/JMBR.40.2.165-176
关键词
intejoint coordination; kinematics; plasticity; proprioception
资金
- NINDS NIH HHS [R01 NS054864-01A1, R01 NS054864, R01 NS055185] Funding Source: Medline
C.Ghez, J.Gordon, and M.F.Ghilardi (1995; J. Gordon, M. F. Ghilardi, & C. Ghez, 1995; R. L. Sainburg, M. F. Ghilardi, H. Poizner, & C. Ghez, 1995) have found that proprioceptive deafferentation impairs feedforward and feedback mechanisms that control reaching movements. In the present study, the authors found immobilization-induced changes in limb kinematics, including joint motion, in 32 healthy participants who performed out-and-back movements before and after 0, 6, or 12 hr of immobilization of the left arm. Control participants did not undergo the arm immobilization procedure. Immobilization for 12 hr, but not 6 hr, caused trajectories with increased hand-path areas and altered interjoint coordination. The abnormalities were smaller in amplitude but similar in quality to those reported in deafferented patients (R. L. Sainburg et at.). In addition, movement onset point significantly drifted after immobilization. Thus, short-term limb disuse can affect interjoint coordination by acting on feedforward mechanisms. These behavioral alterations are potentially related to cortical plastic changes.
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