Bifurcating projections from the cerebellar fastigial neurons to the thalamic suprageniculate nucleus and to the superior colliculus.
A double-labeling fluorescence microscopic study was performed on the mesencephalic and thalamic distribution of fastigial efferents. Anesthetized cats were injected with 2% fast blue into the suprageniculate nucleus and with 0.5% nuclear yellow into the superior colliculus. Analysis of serial sections through the cerebellar fastigial nucleus revealed that 25% of the neurons projecting to the superior colliculus and 10% of those projecting to the thalamus were double labeled. The results suggest that bifurcating fastigial fibers to the mesencephalon and to the visual thalamus may play a role in cerebellar visual control.
Katoh
Y Y
YY
Department of Anatomy, Fujita Health University School of Medicine, Toyoake, Aichi, Japan.
Arai
R
R
Benedek
G
G
D000578:Amidines; D000818:Animals; D001562:Benzimidazoles; D002415:Cats; D002529:Cerebellar Nuclei / Q000166:cytology*; D005456:Fluorescent Dyes; D005829:Geniculate Bodies / Q000166:cytology*; D008856:Microscopy, Fluorescence; D009474:Neurons / Q000502:physiology*; D013477:Superior Colliculi / Q000166:cytology*; D014795:Visual Pathways; D000096926:Benzenesulfonamides
D000578:Amidines; D001562:Benzimidazoles; D005456:Fluorescent Dyes; C031455:diamidino compound 253-50; C036574:nuclear yellow; D000096926:Benzenesulfonamides