Postural adjustments in the monkey: effects of velocity on EMG sequence.
Monkeys were trained to perform flexion or extension movements of the elbow in a strictly restrained position. Even in these conditions, postural adjustments were still recorded. They appeared to be organized in a consistent pattern. When trials were ranked with increasing velocity, two kinds of EMG changes could be described: (i) those in the upper part of the body which may be triggered by anticipatory postural motor programs; (ii) those in lower limbs recruited only with higher velocities and that may correspond to semi-automatic programs organized at a lower level of the central nervous system.
D000818:Animals; D004576:Electromyography; D000882:Haplorhini; D009068:Movement; D009132:Muscles / Q000502:physiology*; D011187:Posture