The tectal commissure and interocular transfer of pattern discrimination in cichlid fish

Mark, R. F.

doi:10.1016/0014-4886(66)90100-2

Cited by 31 publications

(14 citation statements)

References 15 publications

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“…The left and right eye systems can operate quite independently, as suggested by the observation that opposite discriminations can be simultaneously established in the two eye systems (Ingle 1968). Experiments involving subjects trained monocularly to discriminate patterns have shown that interocular information transfer is slow and incomplete (McCleary 1960;Mark 1966;Ingle 1968). Ingle found some interocular transfer of simple discrimination, but loss of information for more difficult discrimination (Ingle 1965).…”

Section: Discussionmentioning

confidence: 99%

The costs of hemispheric specialization in a fish

et al. 2009

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Laboratory and field studies have documented better cognitive performance associated with marked hemispheric specialization in organisms as diverse as chimpanzees, domestic chicks and topminnows. While providing an evolutionary explanation for the emergence of cerebral lateralization, this evidence represents a paradox because a large proportion of non-lateralized (NL) individuals is commonly observed in animal populations. Hemispheric specialization often determines large left -right differences in perceiving and responding to stimuli. Using topminnows selected for a high or low degree of lateralization, we tested the hypothesis that individuals with greater functional asymmetry pay a higher performance cost in situations requiring matching information from the two eyes. When trained to use the middle door in a row of a nine, NL fish correctly chose the central door in most cases, while lateralized fish showed systematic leftward or rightward biases. When choosing between two shoals, each seen with a different eye, NL fish chose the high-quality shoal significantly more often than the lateralized fish, whose performance was affected by eye preference for analysing social stimuli. These findings suggest the existence of a trade-off between computational advantages of hemispheric specialization and the ecological cost of making suboptimal decisions whenever relevant information is located on both sides of the body.

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Section: Discussionmentioning

confidence: 99%

The costs of hemispheric specialization in a fish

et al. 2009

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“…The routes for such transfer of information are becoming clearer, but of the multiplicity of commissures in the teleost brain, none has as yet attained the functional precedence of the corpus callosum of the mammals (e.g., see Myers, 1965). Mark (1966) has implicated the tectal commissure in interhemispheric transfer of both approach and avoidance tasks, but Yeo and Savage (1975) have shown that differential cardiac conditioning will transfer perfectly in fish with this commissure sectioned, as have Ingle and Campbell (1977) using differential avoidance. Possibly this discrepancy in results is explained by difficulties experienced by the tectally split fish in transferring some motor components of the task.…”

Section: Partial Lesions and Commissure Sectionsmentioning

confidence: 96%

The Fish Telencephalon and Its Relation to Learning

Savage

1980

Comparative Neurology of the Telencephalon

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“…The left-and right-eye systems can operate quite independently, as shown by the fact that fish trained monocularly to discriminate between two stimuli can simultaneously learn one stimulus as positive with one eye and negative with opposite eye (Ingle 1968). In general, experiments involving subjects trained monocularly to discriminate patterns have shown that interocular information transfer is slow and incomplete (McCleary 1960;Mark 1966;Ingle 1968). …”

Section: Costs Of Cerebral Lateralizationmentioning

confidence: 99%