after tectal injection of kainic acid ( 0.5-2.0 microgram in 0.5 microliter ) the optic tectum was studied by light and electron microscopy and the following changes were observed : ( a ) within 1-48 h important neuropil vacuolization predominantly in lower part of layer 5 .
C0039433
tectal
C0228405
optic tectum