electrophysiological investigations restricted to the caudomedial part of the optic tectum show that the caudalmost part of the frog 's visual field appears preferentially analyzed by class-2 and class-3 retinal ganglion cells and integrated by monocular t5 neurons even though this spatial region is seen by the two eyes and doubly represented on each tectum .
C0228405
optic tectum
C0039433
tectum