Moreover, it was demonstrated that lactating rats exhibited a high degree of CRF and AVP colocalization in parvocellular
PVN neurons, hypothalamic projections, and median eminence terminals compared to virgins .
This process is due to the small diameter of nerve fibers (parvocellular
population) and dependence on the mitochondria .
In this regard, a reduction in the number of parvocellular
neurons and magnocellular gliosis was found .
On perceiving a stressor stimuli, the parvocellular
neurons of the paraventricular nucleus (PVN) is activated in the hypothalamus to secrete corticotropin-releasing hormone (CRH).
It is produced by two kinds of oxytocinergic neurons: The magnocellular neurons sending their projections to the neurohypophysis releasing OT into blood circulation, and the parvocellular
neurons sending their projections mainly to the campus, ventral tegmental area, frontal cortex, brainstem, pons, medulla, and spinal cord .
However, AVP and oxytocin also can be produced in another group of neurons in the PVN and supraoptic nuclei (i.e., in the parvocellular
neurons) and released into the hypothalamic--hypophyseal portal vessels to reach the anterior pituitary.
The second pathway (parvocellular
) is largely responsible for processing spatial properties of scenes.
Ansiometropic amblyopia: spatial contrast sensitivity deficits in inferred magnocellular and parvocellular
The magnocellular pathway, which is primarily responsible for processing information about location and motion, and the parvocellular
pathway, which is primarily responsible for processing information about detail and color (7).
Colmers, "Glucosensing in parvocellular
neurons of the rat hypothalamic paraventricular nucleus," European Journal of Neuroscience, vol.