Effect of unilateral superior cervical sympathetic ganglionectomy on the contralateral ganglion in rat

: The effect of unilateral superior cervical sympathetic ganglionectomy on the contralateral ganglion was investigated in Sprague-Dawley male rats employing histological and morphometrical procedures. Neuronal cells showed cell enlargement and no change in the nuclear size and the cell number. Neuronal hypertrophy was due to innervation by some fibers of the contralateral half of organs which had been innervated by the ipsilateral ganglion.