An electromyographic study of tension in interrupted and completed tasks.

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Abstract
The experiment sought to determine differences in muscle tension between complete and incomplete activities. Mirror-tracing tasks were used. A continuous EMG record was obtained from five muscle groups. Activity produced a steady rise in tension; this was related to distance from the goal. Muscular tension in certain critical areas persisted for a time after interruption. The findings were attributed to central neural processes capable of self-maintained activity.