Ultrastructural and immunohistochemical study of the telencephalo-habenulo-interpeduncular connections of the goldfish.
Surgical ablations of telencephalon or telencephalon plus habenular nuclei (HBN) have been performed for studying anatomical connections of the telencephalo-habenulo-interpeduncular system of the goldfish. The results of the ultrastructural studies confirmed the presence of massive telencephalo-habenular and habenulo-interpeduncular projections and, in addition, demonstrated a minor direct telencephalo-interpeduncular connection. Immunohistochemical localization of substance P in the interpeduncular nucleus (IPN) after telencephalic ablation failed to demonstrate the involvement of this neurotransmitter in the direct telencephalo-interpeduncular projection, while telencephalon plus HBN ablation reduced substance P immunoreactivity in the IPN. The different distribution of degenerating terminals converging on the IPN from the HBN and from the telencephalon suggested a subnuclear organization of this area, as described in mammals.
Villani
L
L
Department of Biology, University of Bologna, Italy.
Dipietrangelo
L
L
Pallotti
C
C
Pettazzoni
P
P
Zironi
I
I
Guarnieri
T
T
D000818:Animals; D003714:Denervation; D006054:Goldfish / Q000033:anatomy & histology / Q000502:physiology*; D007150:Immunohistochemistry; D008636:Mesencephalon / Q000378:metabolism / Q000502:physiology* / Q000648:ultrastructure; D009434:Neural Pathways / Q000378:metabolism / Q000502:physiology / Q000648:ultrastructure; D013373:Substance P / Q000378:metabolism; D013687:Telencephalon / Q000502:physiology* / Q000648:ultrastructure; D013788:Thalamus / Q000502:physiology* / Q000648:ultrastructure
D013373:Substance P