Serotonin-, substance P- or leucine-enkephalin-containing neurons in the midbrain periaqueductal gray and nucleus raphe dorsalis send projection fibers to the central amygdaloid nucleus in the rat.
By a double-labeling method combining the retrograde tracing of horseradish peroxidase and the immunocytochemical technique, serotonin-, substance P- or leucine-enkephalin-like immunoreactive neurons in the midbrain periaqueductal gray (PAG) and the nucleus raphe dorsalis (DR) of the rat were found to send projection fibers to the central amygdaloid nucleus bilaterally with an ipsilateral dominance. These PAG neurons were chiefly distributed in the ventrolateral PAG subdivision and the ventral parts of medial PAG subdivision at the middle and caudal levels of PAG.
Li
Y Q
YQ
Department of Anatomy, Fourth Military Medical University, Shaanxi, People's Republic of China.
Jia
H G
HG
Rao
Z R
ZR
Shi
J W
JW
D000679:Amygdala / Q000033:anatomy & histology* / Q000166:cytology; D000818:Animals; D001370:Axonal Transport; D004743:Enkephalin, Leucine / Q000032:analysis*; D005260:Female; D006735:Horseradish Peroxidase; D007150:Immunohistochemistry; D008297:Male; D009474:Neurons / Q000166:cytology*; D010487:Periaqueductal Gray / Q000033:anatomy & histology* / Q000166:cytology; D011903:Raphe Nuclei / Q000033:anatomy & histology* / Q000166:cytology; D051381:Rats; D011919:Rats, Inbred Strains; D012701:Serotonin / Q000032:analysis*; D013373:Substance P / Q000032:analysis*
D012701:Serotonin; D013373:Substance P; D004743:Enkephalin, Leucine; D006735:Horseradish Peroxidase