Muscle Activation during Hand Dexterity Tasks in Women with Hand Osteoarthritis and Control Subjects

作者：Calder Kristina M; Galea Victoria; Wessel Jean; MacDermid Joy C; MacIntyre Norma J^*

来源：Journal of Hand Therapy, 2011, 24(3): 207-214.

DOI：10.1016/j.jht.2010.11.003

Study Design: Descriptive cross-sectional study.
Introduction: Hand osteoarthritis (OA) is a condition that results in hand pain and disability. It is important to understand how muscle function impairments contribute to impaired dexterity.
Purpose of the Study: To compare muscle activation in women with and without hand OA and determine if the activation relates to measures of impairment and disability.
Methods: Electromyography (EMG) was recorded from four muscles of the hand/forearm while subjects threaded (assembly) and unthreaded (disassembly) a small bolt. The groups were compared on the integrated EMG (IEMG) of four muscles using two-way repeated-measures analyses of covariance for the assembly and disassembly tasks.
Results: No differences were found in muscle activation between groups when IEMG values were normalized by time (p > 0.05).
Conclusions: Patients with OA have some indicators of altered muscle function. It is unclear whether these are adaptive or predisposing changes. When controlling for the time to perform a task, there were no significant IEMG differences between women with hand OA and control subjects.

• 出版日期2011-9