Baxendale R H, Ferrell W R
Brain Res. 1981 Sep 28;221(2):393-6. doi: 10.1016/0006-8993(81)90789-7.
In intact forelimbs in decerebrate cats, flexion reflexes are most easily elicited when the elbow joint is extended and extension reflexes are most easily elicited when the elbow joint is flexed. Abolition of sensory discharge arising from the elbow joint by intra-articular injection of local anaesthetic eliminates this modulation of reflex excitability. We conclude that elbow joint afferent discharge modulates the transmission in flexion reflex pathways to forelimb motoneurones.
