abnormal neuron physiology abnormal collateral sprouting 2010-11-02T10:06:03Z MP:0010726 MPheno.ontology aberrant response of a neuron to form new neuritic processes (sprouts) that emerge from the nerve fibers or terminal arborizations in response to nerve injury (such as section or denervation), application of neurotoxin, or target tissue atrophy (usually due to disease) abnormal neuron collateral sprouting csmith