Projection pathways in the margin of auditory nuclei in the songbird mesencephal on
- VernacularTitle:鸣禽中脑听觉核团边缘区神经投射的研究
- Author:
Ming-Xue ZUO
1
;
Shao-Ju ZENG
Author Information
1. 北京师范大学
- Keywords:
songbird;
nucleus mesencephalicus lateralis and pars dorsalis;
met-enkaphalin;
immunocytochemistry;
neural projection
- From:
Neuroscience Bulletin
2000;16(1):17-23
- CountryChina
- Language:Chinese
-
Abstract:
The mesencephalic auditory nuclei,the nuc leus mesencephalicus lateralis,pars dorsalis (MLd) and nucleus intercollicularis (ICo),were investigated in the adult songbird (Lonchura striata) for met -e nkaphalin (ENK) immunoreactivity and neuronal connectivity. It was found that th e ENK labeled fibers and neurons were distributed in the MLd margin and ICo, but were nearly absent in the central MLd. After a neural tracer biotionylated dext ran amine (BDA) was injected into the MLd margin, the labeled fibers and neurons were found in the brain nuclei or areas from telencephalon to medulla. There we re five nuclei or areas project to MLd margin:the cup of n. robustus archistriat alis (RA) of telencephalon, the n. preopticus anterior (POA) of hypothalamus, th e n. parabrachialis ventrolateralis (PBv1) of pons ,the n. rostral ventrolatera l medulla (RVL) and the n.infraolivaris superior (IOS) of medulla. The MLd margi n projected to two diencephalic areas, the shell of n. ovoidalis (Ov shell) and the lateral hypothalamus (LHy). The projections from MLd margin to PBv1 and hypo thalamus suggest that the MLd margin in the songbird may play an important role in the integration of anditory-vocalization, endocrine and other physiological activities.
