INTRODUCTION: Location of motor neuron somata supplying forelimb muscles have been studied by retrograde cell degeneration technique [5],[6],[7],[8],[9] and [10] by electrophysiological method [1] and by retrograde axonal transport of horse radish peroxidase (HRP) [11],[12],[13],[2] and [14] These studies have shown the locations of motor neuron somata of major forelimb nerves in cervical enlargement of spinal cord.
There are only few investigations on the locations of motor neuron somata of radial nerve or its branches,[15],[8],[9],[10],[1] [16],[12],[13] and [2] and there is some disagreement concerning their distribution.
The aim of present study is to find out the cranio-caudal extent of spinal cord that harbors the motor neuron somata of radial nerve in rabbit.