Unilateral posterior cortical and unilateral collicular lesions and visually guided behavior in the rat.

Rm, Cooper; Bh, Bland; La, Gillespie; Rh, Whitaker

doi:10.1037/h0029458

Cited by 58 publications

(9 citation statements)

References 6 publications

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“…When more general aspects are considerd (e.g., regarding learning and memory, acquiring potentially important information), the inevitable involvement of higher, integrated mechanisms calls for a more comprehensive model of the kind we propose. It should be noted, however, that Murison (1977), Collin (1977), and Weldon and Smith (1979) obtained hyperactivity in bilateral SCs and ipsiversive rotation in unilateral SCs tested in darkness; and ipserversive turning occurs in enucleated rats with unilateral SC lesions (Cooper, Bland, Gillespie & Whittacker 1970). These results do not fit with Isaac's general thesis.…”

Section: Global Brain Modelsmentioning

confidence: 82%

“…As with the colliculus, the lesion produced an asymmetry toward the lesion side. With both types of lesion, the effect is likely to be of nonvisual, perhaps motor, origin rather than a compensation for neglect of contralateral visual space, since the asymmetry is unaffected by reversal of visual bias via section of the optic chiasm in hippocampals (Saporta & Greene 1974) or by testing in darkness in colliculars (Collin 1977;Cooper, Bland, Gillespie & Whittacker 1970).…”

Section: Unilateral Lesionsmentioning

confidence: 99%

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Relationships between the superior colliculus and hippocampus: Neural and behavioral considerations

Foreman

Stevens

1987

Behav Brain Sci

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Theories of superior collicular and hippocampal function have remarkable similarities. Both structures have been repeatedly implicated in spatial and attentional behaviour and in inhibitory control of locomotion. Moreover, they share certain electrophysiological properties in their single unit responses and in the synchronous appearance and disappearance of slow wave activity. Both are phylogenetically old and the colliculus projects strongly to brainstem nuclei instrumental in the generation of theta rhythm in the hippocampal EECOn the other hand, close inspection of behavioural and electrophysiological data reveals disparities. In particular, hippocampal processing mainly concerns stimulus ambiguity, contextual significance, and spatial relations or other subtle, higher order characteristics. This requires the use of largely preprocessed sensory information and mediation of poststimulus investigation. Although collicular activity must also be integrated with that of “higher” centres (probably to a varying degree, depending on the nature of stimuli being processed and the task requirements), its primary role in attention is more “peripheral” and specific in controlling orienting/localisation via eye and body movements toward egocentrically labelled spatial positions. In addition, the colliculus may exert a nonspecific influence in alerting higher centres to the imminence of information potentially worthy of focal attention. Nevertheless, it is noteworthy that collicular and hippocampal lesions produce deficits on similar tasks, although the type of deficit is usually different (often opposite) in each case. Functional overlap between hippocampus and colliculus (i.e., strategically synchronised or mutually interdependent activity) is virtually certain vis-à-vis stimulus sampling, for example in the acquisition of information via vibrissal movements and visual scanning. In addition, insofar as stimulus significance is a factor in collicular orienting mechanisms, the hippocampus — cingulate – cortex — colliculus pathway may play a significant role, modulating collicular responsiveness and thus ensuring an attentional strategy appropriate to current requirements (stimulus familiarity, stage of learning). A tentative “reciprocal loop” model is proposed which bridges physiological and behavioural levels of analysis and which would account for the observed degree and nature of functional overlap between the superior colliculus and hippocampus.

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Section: Global Brain Modelsmentioning

confidence: 82%

Section: Unilateral Lesionsmentioning

confidence: 99%

Relationships between the superior colliculus and hippocampus: Neural and behavioral considerations

Foreman

Stevens

1987

Behav Brain Sci

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“…Study of the protocols and learning curves do not support the idea that the deficits in performance using the eye on the side of midbrain lesion were due to circling tendencies or to abnormal position habits (Cooper, Bland, Gillespie, & Whitaker, 1970). These habits, formed using either eye, were sometimes abandoned with improvement in learning scores, sometimes maintained even to criterion, and were not consistently related to the circling tendencies.…”

Section: Nature Of the Deficitsmentioning

confidence: 85%

Pretectum and superior colliculus in visually guided behavior and in flux and form discrimination in the cat.

Berlucchi¹,

Sprague²,

Levy³

et al. 1972

Journal of Comparative and Physiological Psychology

132

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Adult split-brain cats with unilateral ablation of pretectum and/or superior oolliculus were trained monocularly in flux and form discriminations. When the midbrain lesions involved both colliculus and pretectum, there was a severe impairment in learning pattern discriminations using the eye on the lesion side. In those cases with the lesions chiefly in the colliculus or in pretectum the deficit was present but less marked. When these same discriminations were taught before the midbrain lesion, no loss in retenlion was found postoperatively.

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“…The typical result of a unilateral striate ablation is a disruption of visual orientation to stimuli in the contralateral visual field (Cooper, Bland, Gillespie, & Whitaker, 1970;Kirvel, Greenfield, & Meyer, 1974;Sprague, 1966). While not quite as salient as this contralateral hemianopia, it is also often reported that the unilateral visual decorticate will exhibit ipsiversive circling.…”

Section: Some Datamentioning

confidence: 99%

Recovery of function after brain damage: A theory of the behavioral deficit

LeVere

1980

Psychobiology

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The present discussion assumes that recovery of function is not an event but rather a process. When it occurs, this process bridges the gap between the occurrence of the brain injury and the reinstatement of a particular behavior disrupted by the brain injury. Accordingly, to understand the process of recovery of function, one must first appreciate the point from which the process begins, that is, the behavioral deficit. It is the thesis of the present discussion that one effect of neural injury is to cause the individual to shift behavioral control to neural systems not directly affected by the neurological insult. The behavioral deficit is then the result of the individual's attempting to learn new behaviors to compensate for those normally mediated by the damaged neural system. Recovery of function, on the other hand, represents a return to the neural system directly affected by the injury and the utilization of whatever of this system may be spared.

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Unilateral posterior cortical and unilateral collicular lesions and visually guided behavior in the rat.

Cited by 58 publications

References 6 publications

Relationships between the superior colliculus and hippocampus: Neural and behavioral considerations

Relationships between the superior colliculus and hippocampus: Neural and behavioral considerations

Pretectum and superior colliculus in visually guided behavior and in flux and form discrimination in the cat.

Recovery of function after brain damage: A theory of the behavioral deficit

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