Projection from area 3a to the motor cortex by neurons activated from group I muscle afferents

Abstract
Two receiving areas in the pericruciate cortex are known for inputs from group I muscle afferents of forelimb nerves. One focus is near the postcruciate dimple of area 3a, and the other in the lateral sigmoid gyrus of the motor cortex (area 4γ). These various neurons may be part of a feedback system from muscle afferents to the motor cortex.