Intrinsic neuronal time delays can be compensated in cat visual cortex and frog tectum with regard to motion analysis.

Motion detection is an essential biological property of vertebral brain. In order to localize moving objects exactly, intrinsic time delays of the neuronal network must be compensated for. Invariance of position with regard to velocity of a stimulus due to a negative spatial shift is one option for compensation. Experimental results found in the present study support the view that negative spatial shift occurs in the visual cortex of the cat and the tectum of the frog. An order of 30% of the visual neurons may be suited to compensate intrinsic time delays.