sympathetic innervation of the pineal gland

ABSTRACT

In the present work, pinealectomy [removal of the pineal gland] was used to demonstrate the sympathetic innervation of the pineal gland by the superior cervical ganglia [SCG] of the albino rat. One day following pinealectomy, many neurons with chromatolytic reaction were. seen in the SCG of the young and adult rats. It has also shown that young animals subjected to pinealectomy, would react more vigorously, with regard to the chromatolysis, than the adults animals. The distribution of these chromotolytic neurons was seen all over the right and left ganglia in both groups, however, they were more abundant in the rostral 2/3 of the ganglia