Fh. Guldner et Ltf. Ng, STRUCTURAL DIFFERENCES BETWEEN OPTIC SYNAPSES IN THE SUPRACHIASMATIC NUCLEUS OF HOODED AND ALBINO-RATS, Neuroscience letters, 166(1), 1994, pp. 5-8
Synapses of retinal afferents (optic synapses) in the suprachiasmatic
nucleus (SCN) were morphometrically compared between hooded and albino
rats. Optic synapses from albino rats show larger boutons with larger
mitochondria, synaptic appositions with less postsynaptic density mat
erial, relatively more symmetric (presumably inhibitory) contacts, and
relatively less asymmetric (presumably excitatory) contacts, compared
with hooded rats. There are no differences in the numbers of clear an
d dense core vesicles, the size of synaptic appositions, and their num
erical density in area of micrograph. possible differences in activity
and/or metabolism between optic synapses from hooded and albino rats
are discussed.