A proposed mechanism for the production of skeletalmotor positioning movements by the basal ganglia.
A programming function for the Basal Ganglia is suggested by implicating them in the production of positioning movements during directed skeletalmotor movements. The Association Cortex (especially the Prefrontal) sends a signal which is an internal representation of the desired end position of a movement to the Caudate. The Sensorimotor Cortex sends feedback from the commands for the primary movement to the Putamen, this representing the end position to be attained by the primary movement. These two signals are integrated in the Lateral Pallidal Segment producing a signal coding the magnitude and possibly the timing of positioning movements. This signal is sent to the Subthalamic Nucleus, which distributes it to the two main output areas of the Basal Ganglia and hence to affect motor and postural pathways.
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D000818:Animals; D001479:Basal Ganglia / Q000502:physiology*; D001842:Bone and Bones / Q000502:physiology*; D006801:Humans; D008954:Models, Biological; D009068:Movement; D011187:Posture