Neuronal organization underlying visually elicited prey orienting in the frog—I. Effects of various unilateral lesions

Kostyk, Sandra K.; Grobstein, Paul

doi:10.1016/0306-4522(87)90323-x

Cited by 70 publications

(16 citation statements)

References 41 publications

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“…If the cortical component is indeed an important parallel pathway, then deficits in skeletomotor actions should be prevalent after tectal lesions in species that lack a neocortex. Indeed, lesions of the OT in the barn owl and frog do appear to compromise a large range of contraversive head (Knudsen et al 1993, Wagner 1993) and body movements (King & Comer 1996, Kostyk & Grobstein 1987), respectively.…”

Section: Differential Control Of Extraocular and Nonextraocular Musclesmentioning

confidence: 99%

Motor Functions of the Superior Colliculus

Gandhi

Katnani

2011

Annu. Rev. Neurosci.

431

342

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The mammalian superior colliculus (SC) and its nonmammalian homolog, the optic tectum, constitute a major node in processing sensory information, incorporating cognitive factors, and issuing motor commands. The resulting action—to orient toward or away from a stimulus—can be accomplished as an integrated movement across oculomotor, cephalomotor, and skeletomotor effectors. The SC also participates in preserving fixation during intersaccadic intervals. This review highlights the repertoire of movements attributed to SC function and analyzes the significance of results obtained from causality-based experiments (microstimulation and inactivation). The mechanisms potentially used to decode the population activity in the SC into an appropriate movement command are also discussed.

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Section: Differential Control Of Extraocular and Nonextraocular Musclesmentioning

confidence: 99%

Motor Functions of the Superior Colliculus

Gandhi

Katnani

2011

Annu. Rev. Neurosci.

431

342

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“…As shown in Sect. The crossed tract is believed to be involved in the control of head and body orientation towards the prey and away from a threat, the uncrossed tectobulbar tract in the control of approach and in the release of snapping Ingle 1983;Kostyk andGrobstein 1982, 1987a-c;Masino and Grobstein 1989a,b). 19.78), the tectum has two main descending output channels, the crossed tectobulbospinal and the uncrossed tectobulbar tracts.…”

Section: Functional Correlationsmentioning

confidence: 99%

Anurans

Donkelaar¹

1998

The Central Nervous System of Vertebrates

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“…Unilateral lesions of the tegmenturn can abolish turning toward prey items in the ipsilateral visual hemifield (Kostyk and Grobstein 1987;Masino and Grobstein 1989). Unilateral lesions of the tegmenturn can abolish turning toward prey items in the ipsilateral visual hemifield (Kostyk and Grobstein 1987;Masino and Grobstein 1989).…”

Section: Introductionmentioning

confidence: 97%

Visually elicited turning behavior in Rana pipiens: comparative organization and neural control of escape and prey capture

King

Comer

1996

J Comp Physiol A

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High-speed videography was used to describe the initial turning movement of visually triggered escape in frogs and to compare it with the initial turn of frog prey capture behavior. These two types of turning had some general similarities, e.g. turn duration and peak velocity were positively correlated with turn angle. However, there were kinematic differences: for turns of a given angular amplitude, escape turns consistently demonstrated shorter duration and higher peak velocity than prey capture turns. There also were differences in spatial accuracy: prey capture turn angles were predictably matched to stimulus angles; escape turn angles were more variably related to stimulus angles. Both turning movements are believed to depend upon the optic tectum. However, given the observed differences in kinematics and spatial organization, we used lesion experiments to determine if distinct tectal efferent pathways subserve turning under each circumstance. Large unilateral lesions of the brainstem simultaneously disrupted both types of turning. However, smaller laterally placed lesions disrupted escape turning without disrupting prey capture turns. The kinematic differences in combination with the lesion results support the idea that the post-tectal circuitry for visually elicited turning movements is based upon separate descending pathways that control turning toward prey and turning away from threat. Key words Frog 9 Tectum 9 Brainstem 9 Approach 9 Avoidance Abbreviations CG central gray 9 OT optic tectum 9 SEM standard error of the mean

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Neuronal organization underlying visually elicited prey orienting in the frog—I. Effects of various unilateral lesions

Cited by 70 publications

References 41 publications

Motor Functions of the Superior Colliculus

Motor Functions of the Superior Colliculus

Anurans

Visually elicited turning behavior in Rana pipiens: comparative organization and neural control of escape and prey capture

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