[Functional morphology of accessory neurosecretory cells in cat hypothalamus].

In acute experiments on tomcats after stimulation of supraoptic nuclei (SON), postoptic nuclei (PON), preoptic area of the hypothalamus, cervical sympathetic nerve (SCN) and vagal afferent fibers (VA) the following data were obtained in the preparations stained by Gomori method: four pair accessory cell groups in the rostral part of the hypothalamus were observed: 1) periventricular group (along the walls of the III ventricle; 2) the preoptic group (above the preoptic recess; 3) the parafornical group (around the fornix columns), and 4) the spindle-shaped group. The latter group was revealed constantly both in control and in the stimulated animals in all the experiments. In direct stimulation of the SON and PON and also if the CSN and the vagus direction of its reaction coincided with such in the SON and PON, whereas in stimulation of the VA of the hypothalamus the synthesis activation was observed against the background of unchanged (in comparison with control) state of the neurosecretory nuclei.