Case pg235, fig3. Soma notes 4 male brown Norweg. rats were bilaterally injected in the vitreous of the eyes with 8 microliters of 0.1% HRP conjugated ti cholera toxin, ?subunit. also use glutamate immunoreactivity. Terminal notes In rostral SCN, labelling found in in the ventral part of the nucleus lining the optic chiasm. In the middle and caudal SCN dense labeling was also present along the ventrolateral and dorsolateral side of the nucleus, almost no lab in dor.med. part of SCN.