A neural model of interactions subserving prey-predator discrimination and size preference in anuran amphibia

Cervantes-Pérez, Francisco; Lara, Rolando; Arbib, Michael A.

doi:10.1016/s0022-5193(85)80080-1

Cited by 59 publications

(15 citation statements)

References 22 publications

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“…In the previous tectal column model (Lara et al 1982;Cervantes-Perez et al 1985), small pear cells received R2 inputs through the glomerulus dendrites, as well as SN inhibition. The output of SP projects on the large pear cell and the pyramidal cell in the same column.…”

Section: Discussionmentioning

confidence: 99%

“…where 9 represents convolution, S indicates the output firing rate of the previous layer, and a kernel element k(x, y) is defined as worm response Betts (1989) omitted the R4 connections used in an earlier model (Cervantes-Perez et al 1985) k…”

Section: Model Of Retinal Processingmentioning

confidence: 99%

“…According to the tectal column model (Lara et al 1982;Cervantes-Perez et al 1985) which was abstracted 257 from the anatomy of the anuran tectum (Sz~kely and Lfizhr 1976), each column comprises a pyramidal cell, PY, as the sole output cell, a large pear-shaped cell, LP, a small pear-shaped cell, SP, and a stellate inhibitory interneuron, SN. Tectum is modeled by an array of locally connected columns.…”

Section: Tectal Relaymentioning

confidence: 99%

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How does the toad's visual system discriminate different worm-like stimuli?

Wang

Arbib

1991

Biol. Cybern.

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Behavioral experiments show that toads exhibit stimulus- and locus-specific habituation. Different worm-like stimuli that toads can discriminate at a certain visual location form a dishabituation hierarchy. What is the neural mechanism which underlies these behaviors? This paper proposes that the toad discriminates visual objects based on temporal responses, and that discrimination is reflected in different average neuronal firing rates at some higher visual center, hypothetically anterior thalamus. This theory is developed through a large-scale neural simulation which includes retina, tectum and anterior thalamus. The neural model based on this theory predicts that retinal R2 cells play a primary role in the discrimination via tectal small pear cells (SP) and R3 cells refine the feature analysis by inhibition. The simulation demonstrates that the retinal response to the trailing edge of a stimulus is as crucial for pattern discrimination as the response to the leading edge. The new dishabituation hierarchies predicted by this model by reversing contrast and shrinking stimulus size need to be tested experimentally.

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Section: Discussionmentioning

confidence: 99%

Section: Model Of Retinal Processingmentioning

confidence: 99%

Section: Tectal Relaymentioning

confidence: 99%

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How does the toad's visual system discriminate different worm-like stimuli?

Wang

Arbib

1991

Biol. Cybern.

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“…In most cases, the pretectum was regarded as a mere transition zone between thalamus and midbrain, literally ''an undifferentiated field transitional to the tectum and motor tegmentum'' (Herrick 1935). However, the physiology of the pretectum has been thoroughly investigated in amphibians, mainly in relation to visuomotor and prey-catching behavior, showing considerable complexity (Scalia and Fite, 1974;Cervantes-Perez et al, 1985;Montgomery and Fite, 1989;Buxbaum-Conradi and Ewert, 1999). In contrast, the cytoarchitecture and development of the pretectum were basically ignored in most morphological studies, with the exception only of the study by Aronson and Noble (1945).…”

mentioning

confidence: 99%

Embryonic genoarchitecture of the pretectum in Xenopus laevis: A conserved pattern in tetrapods

et al. 2011

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Networked gene activities control the evolutionarily conserved histogenetic organization of the central nervous system of vertebrates. Genoarchitectonic studies contribute to the analysis of each morphogenetic field by identifying distinct progenitor domains and corresponding derivatives whose pattern of gene expression shows a unique combinatory code. Previous studies in the pretectal region (caudal diencephalon) have defined three anteroposterior genoarchitectonic domains that are conserved in birds and mammals. Here, we have studied the embryonic pretectal genoarchitecture in the amphibian Xenopus laevis, in order to determine whether it is possible to define a comparable anteroposterior tripartition of the amphibian pretectal area. The expression patterns of 14 genes mapped from early embryonic stages to metamorphic climax allowed us to define the boundaries of the pretectum, the expected precommissural, juxtacommissural, and commissural anteroposterior domains, and some dorsoventral subdivisions. Taken together, our data provide evidence for a conserved pattern of pretectal domains and subdomains, shared by amniotes and amphibian anamniotes (tetrapods), understandable as part of a general Bauplan in vertebrates.

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“…However, even the present model allows us to make a number of detailed predictions to be tested by future experimentation. Meanwhile, the model plays an invaluable role in work in our laboratory on Rana computatrix, computational modeling of neural mechanisms of anuran visuomotor coordination, as we seek to refine earlier models which use a "black box" retinal input based on averaging firing rates (e.g., Cervantes-Perez et al 1985) by models which show how central structures process spatiotemporal properties of retinal firing.…”

Section: Introductionmentioning

confidence: 99%

A model of anuran retina relating interneurons to ganglion cell responses

Teeters

Arbib

1991

Biol. Cybern.

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A model is presented which accounts for many characteristic response properties used to classify anuran ganglion cell types while being consistent with data concerning interneurons. In the model color is ignored and input stimuli are assumed to be only black and white at high contrast. We show that accurate ganglion cell responses are obtained even with simplified receptors and horizontal cells: Receptors are modeled as responding with a step change, while horizontal cells respond only to global changes in intensity brought about by full field illumination changes. A hyperpolarizing and depolarizing bipolar cell are generated by subtracting local receptor and horizontal potentials. Two transient amacrine cells (On and Off) are generated using a high-pass filter like mechanism with a thresholded output which responds to positive going changes in the corresponding bipolar cell potentials. The model shows how a selective combination of bipolar and amacrine channels can account for many of the response properties used to classify the anuran ganglion cell types (class-0 through 4) and makes several experimental predictions.

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A neural model of interactions subserving prey-predator discrimination and size preference in anuran amphibia

Cited by 59 publications

References 22 publications

How does the toad's visual system discriminate different worm-like stimuli?

How does the toad's visual system discriminate different worm-like stimuli?

Embryonic genoarchitecture of the pretectum in Xenopus laevis: A conserved pattern in tetrapods

A model of anuran retina relating interneurons to ganglion cell responses

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