Fig. 2.

Schematic representation of the effects of various spinal lesions on the neural control of forelimb-hindlimb coordination. Shown are the effects of a mid-thoracic lateral hemisection (A), contralaterally placed lateral hemisections at mid-thoracic and low thoracic levels (B), and contralaterally placed lateral hemisections at upper cervical and mid-thoracic levels (C) on the neural control of interlimb coordination depicted in Fig. 1. The dashed lines for diagonal pathways indicate a weakening of these projections with the various lesions. CPG, central pattern generator; E, extensor; F, flexor; LF, left forelimb; LH, left hindlimb; RF, right forelimb; RH, right hindlimb.