Aprendizagem e memoria de escolha alimentar em pombos (Columba livia) : analise de efeitos da lesão no complexo paleoestriatal

AUTOR(ES)
DATA DE PUBLICAÇÃO

2002

RESUMO

The purpose of the present work was to investigate the effect of neurochemical lesion with unilateral injection of ibotenic acid in Paleoestriatal Complex of pigeons (Columba livia) on the performance and accuracy of food choice behavior. Sixteen male pigeons were divided in three groups: Experimental, Sham and ContraI. Ali the animais were trained in four sessions of food choice (condition Pre-Iesion) with two feeders located parallel to the lateral wall opposite to the. initial box. One feeder had sand and the other had food covered with sand. The latency and adequacy (correct ar incorrect) of the choice response were analyzed by direct observation and revised by videotapes of the experimental sessions. In the day following the fourth training session, experimental birds received unilateral infusion of 3ul of ibotenic acid (1ug/1ul). Sham animais suffered only anesthesia and skull trepanation and the contrai had no surgical manipulation. Ali the animais had Post-lesion, Reversion 1 and Reversion 2 training conditions with four sessions each. Reversion 1 condition had the feeders translocated to the opposite wall within the chamber. Results showed an increase of median value of choice response latency in the experimental group compared to the sham and control groups (F{2,13) = 3,76, p = 0,051). Decreases of percentage values of correct choice were seen during Reversion 1 condition for the three groups (F{3,2) = 14,64, P <0,0001). The data indicated that the lesion in a restricted region of the Paleoestriatal Complex interfered in the performance of the pigeons. More pronounced deficits observed in Reversion 1 condition, when the contextual stimuli were rearranged, may be indicative of PC lesion effects on the processing of new relations among contextual stimuli

ASSUNTO(S)

aprendizagem memoria

ACESSO AO ARTIGO

Documentos Relacionados