abnormal motor nerve collateral sprouting MP:0004243 MPheno.ontology aberrant response of a motor neuron to form new neuritic processes (sprouts) that emerge from the nodes of Ranvier or terminal arborizations in response to nerve injury (such as denervation), application of nerve toxin, or muscle inactivity (usually due to disease) abnormal motor nerve nodal sprouting abnormal motor nerve terminal sprouting abnormal collateral sprouting