title: Some data on connections of neurons of nuclei isthmi of the chicken.
abstract: After PhA-L injection into the tectum opticum of chickens, column-like labelled terminal arborizations were found in tectum and also labelled neurons of Ipc and Imc in the corresponding sections. The PhA-L labele proved the projection from both Imc and Ipc neurons to tectum; their terminal axonarborizations were clearly discernible. Column-like terminal arborizations of different sizes were found both in PHA-L and Golgi impregnated preparations. GABA immunostaining displayed GABA positive neurons in Imc. The EM-Golgi study corroborated that the axon-terminals of Imc neurons established symmetrical synapses in the tectum. The results of the present study support the existence of an inhibitory feedback loop from Imc neurons to the tectum.
authors.affiliation: Semmelweis University Medical School, 1st Department of Anatomy, Budapest, Hungary.
authors.forename: T
authors.initials: T
authors.lastname: Tömböl
authors.forename: G
authors.initials: G
authors.lastname: Egedi
authors.forename: A
authors.initials: A
authors.lastname: Németh
mesh_terms: D000818:Animals; D001253:Astrocytes / Q000502:physiology / Q000648:ultrastructure; D001369:Axons / Q000502:physiology / Q000648:ultrastructure; D002645:Chickens / Q000033:anatomy & histology*; D007150:Immunohistochemistry; D008854:Microscopy, Electron; D009474:Neurons / Q000378:metabolism / Q000502:physiology* / Q000648:ultrastructure; D009475:Neurons, Afferent / Q000502:physiology / Q000648:ultrastructure; D010835:Phytohemagglutinins; D013477:Superior Colliculi / Q000033:anatomy & histology* / Q000166:cytology / Q000378:metabolism; D005680:gamma-Aminobutyric Acid / Q000378:metabolism
chemical_list: D010835:Phytohemagglutinins; D005680:gamma-Aminobutyric Acid