in neonates , however , pyramidal tract neurons are distributed throughout the neocortex , but all of those found in certain areas , such as the posterior occipital region ( including primary visual cortex ) selectively lose their pyramidal tract axon ( stanfield et al. , 1982 ) yet maintain axon collaterals to other subcortical targets ( o'leary and stanfield , 1985 ) .
C0027882
neurons
C0004461
axon