Spatial discrimination in goldfish following bilateral tectal ablation
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Spatial discrimination in goldfish following bilateral tectal ablation.
Goldfish were classically conditioned to discriminate between right and left or nasal and temporal presentations of a spot-of-light conditioned stimulus (CS). After the conditioning, the fish were administered bilateral optic tectum ablation followed by weekly sessions of conditioning trials to test for retention or relearning of the discrimination response. As their behavioral photosensitivity...
متن کاملVision in goldfish following bilateral tectal ablation.
Visual sensitivity of optic tectum-ablated goldfish was investigated using a classical conditioning technique. Intact fish were screened to obtain individuals which showed suppression of breathing movements in response to the visual conditioned stimulus (CS) in the presence or absence of adapting illumination. Following bilateral optic tectum ablation, responding was blocked in light-adapted bu...
متن کاملVisual recovery in goldfish following unilateral optic tectum ablation: evidence of competition between optic axons for tectal targets.
Anatomical studies suggest that regenerating optic axons which invade the ipsilateral lobe of the optic tectum following ablation of the contralateral lobe compete with resident optic axons for synaptic sites on tectal neurons. Invader optic axons are initially uniformly distributed over the entire tectal lobe. With time, the invader and resident optic axons progressively segregate so that the ...
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The present work analyzes the involvement of telencephalon of goldfish in spatial strategies, using a procedure analogue to the hole-board task. With this aim, goldfish with sham operation or telencephalon ablation were trained to find a baited feeder within a twenty-five feeder matrix, which maintained stable spatial relationships relative to five peripheral landmarks. After training, differen...
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Five visually mediated behaviors were assessed following ablation of one or both lobes of the optic tectum in goldfish. Three of the behaviors disappeared following tectal ablations: optomotor response (swimming with the stripes in a rotating striped drum), food pellet localization and shadow-induced deceleration of respiration. Two of the behaviors persisted following tectal ablation: optokine...
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ژورنال
عنوان ژورنال: Behavioural Brain Research
سال: 1987
ISSN: 0166-4328
DOI: 10.1016/0166-4328(87)90073-8