John T. Hansen

TL;DR: In this paper, the pineal gland of the Mongolian gerbil following superior cervical ganglionectomy (SCGX) was studied and the effects of sympathetic denervation on the morphology of the gland at two time periods, 0500 and 1900 h (one hour before lights-on and lights-off, respectively).

TL;DR: The number of “synaptic” ribbons was inversely correlated with the density of the adrenergic nerve endings of the pineal gland compared among a diverse group of species including the fox, cat, rat, cotton rat, white‐footed mouse, Djungarian hamster, ground squirrel, and chipmunk.

TL;DR: The presence of opioid peptide‐like substances co‐existing with the glomus cell catecholamines, perhaps in the same vesicles, may have important implications for a trophic influence of these peptides on glomUS cell chemoreceptor modulation.

TL;DR: Immunocytochemical localization of dopamine β-hydroxylase (DBH) was used to study the synthesis and storage sites of norepinephrine (noradrenaline) in the rat and cat carotid bodies to indicate that some of glomus cells in theRat and most of the glomUS cells inThe cat contain DBH and therefore may be sites ofNorepine cortisol synthesis.

TL;DR: Daytime numbers of pineal “synaptic” ribbons higher than reported in the pineal gland of any other mammalian species were observed in two diurnal rodents, the eastern chipmunk and Richardson's ground squirrel.