Publication: Influence of light-dark, seasonal and lunar cycles on the nuclear size of the pinealocytes of the rat
Loading...
Date
2002
Authors
Martínez Soriano, F. ; Armañanzas, E. ; Ruíz Torner, A. ; Valverde-Navarro, A.A.
item.page.secondaryauthor
item.page.director
Publisher
Murcia : F. Hernández
publication.page.editor
publication.page.department
DOI
item.page.type
info:eu-repo/semantics/article
Description
Abstract
Morphological and physiological studies
suggest a possible division of the pineal parenchyma into
an external or “cortical” and another central or
“medullar” layer. We have studied the possible influence
of the light/dark, seasonal and lunar cycles on the
nuclear size of the pinealocytes of the rat in both the
hypothetical “cortical” and “medullar” layers. Forty
male Wistar rats were used. Experiment was carried out
in two seasons, winter and spring, two lunar phases, full
moon and new moon, and the two circadian phases,
photophase and scotophase. The nuclear volume of the
pinealocytes, calculated from the Jacobj’s formula, was
the karyometric parameter used as measurement of the
nuclear size. Main results showed that nuclear volume of
the cortical pinealocytes was greater than that of the
medullar pinealocytes only during the photophases of
winter new-moon days and spring full moon days,
whereas in all the remaining situations, the greater
nuclear sizes were found in the pinealocytes of the
medullar layer. These results support the existence of
independent morphological variations of the pinealocyte
in the central and peripheral zones of the pineal gland.
publication.page.subject
Citation
item.page.embargo
Ir a Estadísticas
Sin licencia Creative Commons.