A comparison of the effects of superior collicular ablation in infant and adult rats.

A comparison of the effects of superior collicular ablation in infant and adult rats. Research Abstract Details 

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A comparison of the effects of superior collicular ablation in infant and adult rats. Abstract Text:

C A Heywood,A Cowey,

Rats sustaining damage to the superior colliculus in infancy or adulthood and sham-operated controls were tested on two tasks requiring visual orienting to 'unexpected' and 'expected' stimuli, respectively. Experiment 1 measured the distracting effect of novel visual and auditory stimuli presented while the animals traversed a familiar runway. Control rats oriented to the distracting stimulus and had lengthened running times on the trials where it was presented. Rats with lesions of the superior colliculus were less distracted by the appearance of unexpected stimuli than sham operated controls but the severity of this effect depended on modality, and on age at operation. Experiment 2 examined the same animals' ability to detect and respond to a small and expected light that appeared at randomly determined positions around the perimeter of a chamber while the rat was at the centre. Filmed records and analyses of response latencies and errors showed that at low stimulus intensities, the active exploration shown particularly by infant-operated animals resulted in performance that was superior to that of adult-operated animals and, at least in terms of error rate, sham-operated controls. It is concluded that unusual behavioural strategies can explain all the differences between the animals operated at different ages. There was no evidence that novel projections from the retina were responsible.

A comparison of the effects of superior collicular ablation in infant and adult rats. Publishing Authors By Initials

CA Heywood,A Cowey,

For similar psychological phenomena and processes: mental processes: perception: visual perception research abstracts see: psychological phenomena and processes: mental processes: perception: visual perception research

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A comparison of the effects of superior collicular ablation in infant and adult rats. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Experimental brain research. Experimentelle Hirnfo

VOLUME: 59

Page Numbers: 302-12

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ISSN: 0014-4819

DAY: 15

MONTH: 02

YEAR: 1985

A comparison of the effects of superior collicular ablation in infant and adult rats. Information

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LANGUAGE: eng

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A comparison of the effects of superior collicular ablation in infant and adult rats. Keywords Mesh Terms:

KEYWORDS: Visual Perception

MESH TERMS: physiology

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Country: GERMANY, WEST

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MEDLINETA: Exp Brain Res

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