to study the effects of extrinsic influences on the survival , growth and connectivity of axotomized neurones in the mature mammalian cns , we replaced the optic nerve in adult rats with segments of autologous peripheral nerve ( pn ) and used morphometric techniques , neuroanatomical tracer substances and immunological cell markers to examine retinal ganglion cells ( rgcs ) , their axons in the pn grafts and their terminals in the superior colliculi ( sc ) of these animals .
C0027882
neurones
C0004461
axons