the cytoarchitecture of the graft and its extension allowed to distinguish two types of transplants : in 50 % of the cases the graft developed a laminated , tectal-like structure appearing as a supernumerary optic tectum , whereas in the other 50 % of the cases it gave rise to a smaller , not well-defined , non-laminated structure , which could not be recognized as tectal .
C0228405
optic tectum
C0039433
tectal