Luteinizing hormone-releasing hormone (LH-RH) cells and their projections in the forebrain of the batMyotis lucifugus lucifugus

摘要: Abstract Luteinizing hormone-releasing hormone (LH-RH) neurons and their projections were studied by immunocytochemistry in the brains of little brown bats (Myotis lucifugus lucifugus: Chiroptera: Vespertilionidae) as a first step study relationships between these seasonal reproductive events characteristic this species. The majority immunoreactive adult male, female, fetal ovoid bipolar cells with one thin thicker process, both which gave rise to fine varicose fibers. LH-RH-immunoreactive perikarya concentrated region arcuate nuclei all examined. Perikarya also consistently found dispersed mammillary region, anterior hypothalamus, preoptic areas, septum, diagonal band Broca, olfactory tracts; they occasionally observed dorsal organum vasculosum lamina terminalis (OVLT), habenula, amygdala, cingulate gyrus. fibers projected heavily median eminence, infundibular stalk, posterior pituitary. In extrahypothalamic especially abundant stria medullaris/habenula terminalis/amygdala, but contributed Broca tracts. Immunoreactive that may be components many different pathways clustered rostral septum permeated medial hypothalamus. LH-RH-containing frequently entered subfornical organ, less often OVLT only pineal. organization LH-RH system bat resembles primates, differs considerably from rat. Anatomical characteristics thus suggest animal particularly suitable species for further neuroendocrine control function it relate including humans.