Topic: slow motoneurons

Earlier evidence shows that motoneuron collaterals can form synaptic contacts with other motoneurons in spinal cord. We have recently shown that late-firing motoneurons (putative fast) receive 10-fold stronger recurrent excitation than their early-firing (putative slow) counterparts. This finding raises the question of whether connections between motoneurons are dominantly between fast motoneurons or whether slow motoneurons preferentially connect to fast ones. We performed paired recordings from motoneurons labelled from either gastrocnemius (ankle extensor) or tibialis anterior (ankle flexor