Position reversal learning as affected by occipital, posterior thalamic, and rubral lesions in the white rat

Thorne, Barrie; Thompson, Robert

doi:10.3758/bf03332369

Cited by 5 publications

(3 citation statements)

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“…Earlier studies have reported spatial reversal-learning impairments in rats prepared with lesions to the cerebral cortex (Divac, 1971;Thorne & Thompson, 1970), corpus striatum (Divac, 1971;Hannon & Bader, 1974;Kolb, 1977), limbic system (Kimble & Kimble, 1965;Samuels, 1972;Thompson & Langer, 1963), thalamus (Kolb, 1977;Means, Hershey, Waterhouse, & Lane, 1975;Thorne & Thompson, 1970), hypothalamus (Thompson & Langer, 1963), or midbrain (Thorne & Thompson, 1970). The results of the present experiment not only confirm these findings, but attest to the unusually high degree of sensitivity of the spatial reversal-learning task to the presence of brain damage in the albino rat.…”

Section: Spatial Reversal Learningsupporting

confidence: 89%

Abnormal learning and forgetting of individual spatial reversal problems in brain-damaged rats

Thompson

1983

Psychobiology

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Except for amygdaloid lesions and cortical cerebellar ablations, selective destruction of virtually any part of the tel-, di-, mes-, or metencephalon was found to impede spatial reversal learning in the rat. (These data contrast sharply with those reported in recent studies on visual reversal learning in the rat.) Test trials given after learning each reversal problem disclosed significant (or marginally significant) deficits in retention only in those groups sustaining damage to the cingulate cortex, ventral hippocampus, rostral caudoputamen, lateral supraoptic hypothalamus, posterolateral hypothalamus, lateral thalamic complex, mediodorsal thalamus, ventromedial thalamus, parafascicular nucleus, substantia nigra, interpeduncular-central tegmental area, pontomesencephalic reticular formation, or pontine reticular formation. It is proposed that there may be at least three classes of learning (amnesic) disorders observed on any given task: (1) a learning impairment only, (2) a retention impairment only, and (3) both a learning and retention impairment.Huppert and Piercy (1979) have presented evidence suggesting that there may be at least two classes of learning (amnesic) disorders in braindamaged patients. In one, learning is impaired, but retention over time of what has been learned is unimpaired. The second is characterized by an impairment (or no impairment) in learning, but retention over time of what has been learned is impaired.

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Section: Spatial Reversal Learningsupporting

confidence: 89%

Abnormal learning and forgetting of individual spatial reversal problems in brain-damaged rats

Thompson

1983

Psychobiology

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“…Damage to the occipital cortex had little effect on tactile reversal learning. This may be viewed as contrasting with earlier reports which have shown that these ablations can impair visual reversals (LeVere & Morlock, 1973) and, under some conditions, spatial reversal learning (Thorne & Thompson, 1970). The new data imply that the effects of posterior cortical lesions on reversal learning may be somewhat more specific to problem type than has previously been recognized.…”

Section: Discussioncontrasting

confidence: 97%

“…327 0090-5046/79/040327-06$00.85/0 to be used (Finger, 1974), and in the two former cases because previous experiments with other tasks have shown that reversal learning can be significantly impaired by these lesions (Bourke, 1954;Kolb, Nonneman, & Singh, 1974;LeVere & Morlock, 1973;Thorne & Thompson, 1970). [It should be noted, however, that previous studies from this laboratory have shown that frontal and occipital cortex lesions have little apparent affect on nonreversal performance with tactile stimuli (e.g., Finger, Cohen, & Alongi, 1972;Finger & Frommer, 1968). ]…”

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confidence: 99%

Brain damage and the overlearning reversal effect

1979

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Rats were either trained to criterion or given 100% overtraining on a tactile discrimination before receiving sham operations or frontal. somatic, or occipital cortex lesions. With preoperative training to criterion, the rats with frontal and somatic cortex lesions showed marked postoperative impairments when tested for reversal learning with the same tactile stimuli previously encountered, whereas animals with occipital cortex ablations did not differ significantly from sham-operated subjects. Preoperat.ive overtraining failed to improve postoperative reversal learning among the sham-operated animals , and it. did not attenuate the ablation effects displayed by rats with frontal or somatic cortex lesions. These data show that the overlearning reversal effect (ORE), which has ,been reported with visual and spatial stimuli, may be more difficult to demonstrate with tactile discriminanda. The findings further suggest that early reports of preoperative overtraining lessening postoperative lesion effects may have less generality than previously recognized. ZUBEK, J. P. Recent electrophysiological studie s of the cerebral cortex: Impl ications for localizat ion of sensory functions .

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Rapid forgetting of individual spatial reversal problems in rats with parafascicular lesions

Thompson

Kao

Yang

1981

Behavioral and Neural Biology

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Position reversal learning as affected by occipital, posterior thalamic, and rubral lesions in the white rat

Cited by 5 publications

References 5 publications

Abnormal learning and forgetting of individual spatial reversal problems in brain-damaged rats

Abnormal learning and forgetting of individual spatial reversal problems in brain-damaged rats

Brain damage and the overlearning reversal effect

Rapid forgetting of individual spatial reversal problems in rats with parafascicular lesions

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