MORPHOLOGICAL-CHARACTERISTICS OF LATERAL RECTUS MOTONEURONS SHOWN BY INTRACELLULAR INJECTION OF HRP

  • 1 January 1979
    • journal article
    • research article
    • Vol. 75  (5) , 513-519
Abstract
The morphology of identified [cat] lateral rectus motoneurones is described after staining by intracellular iontophoresis of horseradish peroxidase. Soma vary in shape and size according to the number and orientation of primary dendrites. The basic pattern of arborization shows short primary dendrites which branch close to the soma, forming a distal ramification extending over 600-1200 .mu.m from the soma. Distal dendrites extend into the ipsilateral medial vestibular nucleus, the reticular formation and among the fibers of the medial longitudinal fasciculus. This extension is greater than previously seen in procion yellow and Golgi stained lateral rectus motoneurones. The axon originates from the perikarya or from the base of a primary dendrite. No axon collaterals were observed.