Interocular transfer of habituation in pigeons: Mediation by tectal and/or posterior commissures

Lateralized Interhemispheric Transfer of Color Cues: Evidence for Dynamic Coding Principles of Visual Lateralization in Pigeons

“…In the retention test birds needed on average 34.4 Ϯ 3.0 trials to criterion. Calculating the savings as percentages for each retention session of all birds [(trials in acquisition Ϫ trials in retention)/(trials in acquisition ϩ trials in retention) ϫ 100], also called transfer index (Hamassaki & Britto, 1987;Watanabe, 1988), the average improvement of all birds accounts to an overall reduction in the number of trials to criterion by 38.9%. As compared to the nontransfer groups that showed on average 45.6% savings (R-R, 47.6%; L-L, 43.6%), both transfer groups reached similar saving measures with 31.5 Ϯ 6.6% for the R-L group and 37.4 Ϯ 6.3% for the L-R group.…”

A GABAergic tecto–tegmento–tectal pathway in pigeons

“…The left and right TeO modulate their activity patterns via the tectal (CT) and the posterior commissures (CP) (Robert and Cuénod, ; Niida, ; Mascetti and Arriagada, ; Rhoades et al, ; Keysers et al, ). These commissures have been implicated in interhemispheric transfer of visual discriminations in fish (Mark, ; Ingle and Campbell, ; Hemsley and Savage, ), in transfer of habituated stimuli and in lateralized visuomotor behavior in birds (Hamassaki and Britto, ; Güntürkün and Böhringer, ), and in transfer of black–white discrimination, recovery from cortical hemianopia, and to some extent transfer of motion and brightness discrimination in mammals (Sherman, ; Peck et al, ; Hottman, ; Sprague, ).…”