Telencephalic and pretectal modulation of the directional selectivity of accessory optic neurons in the pigeon.
Direction-selective units within the accessory optic system of the pigeon were shown to respond more strongly to motion along two main directions, downward-nasal and upward-temporal. Following ipsilateral telencephalic or pretectal lesions, these directions were modified in a systematic way. In the former, the principal response directions were downward-nasal and temporal and in the latter, downward-temporal and upward-temporal. These data indicate that the non-retinal afferents play an important role in the functional organization of the accessory optic system.
Hamassaki
D E
DE
Departamento de Fisiologia e Biofísica, Universidade de São Paulo, Brasil.
Gasparotto
O C
OC
Nogueira
M I
MI
Britto
L R
LR
D000818:Animals; D010856:Columbidae / Q000502:physiology*; D005260:Female; D008297:Male; D009474:Neurons / Q000502:physiology*; D010775:Photic Stimulation; D013238:Stereotaxic Techniques; D003336:Tectum Mesencephali / Q000502:physiology*; D013687:Telencephalon / Q000502:physiology*; D014795:Visual Pathways / Q000502:physiology*