Retinotopic organization of the guinea pig's visual cortex

Choudhury, Bijan

doi:10.1016/0006-8993(78)90432-8

Cited by 44 publications

(33 citation statements)

References 15 publications

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“…Mouse extrastriate cortex also differs from that in many nonprimate species (i.e., quoll, hedgehog, guinea pig, rabbit, flying fox, opossum, squirrel, tree shrew, cat) in which V1 is adjoined on the lateral side by a single area, V2 (Kaas et al, 1970(Kaas et al, , 1989Hall et al, 1971;Towns et al, 1977;Payne, 1993;Rosa, 1999;Kahn et al, 2000), and therefore has a "simple" organization . However, mouse extrastriate cortex is similar to that in species with a "simple" organization, in that V1 is adjoined on the medial side by parastriate or splenial visual areas, which in hedgehog, rat, hamster, degu, guinea pig, and cat receive direct V1 input and contain visually responsive neurons (Kalia and Whitteridge, 1973;Choudhury, 1978;Gould and Ebner, 1978;Olavarria and Mendez, 1979;Bravo et al, 1990;Olavarria and Montero, 1990;Spatz et al, 1991;Montero, 1993). Thus, mouse extrastriate cortex is "simple" in the sense that it has a single V2-like area, LM, on the lateral side of V1, but is "complex" in that lateral V1 is adjoined by multiple visual areas.…”

Section: Vertical Meridian Representation In V1 Is Confined To V1/lm mentioning

confidence: 93%

“…10A,B). Because, in some rodents and in all nonrodent mammals, V2 is the only area that ad- joins V1 at the vertical meridian (Kaas et al, 1970(Kaas et al, , 1972(Kaas et al, , 1989Hall et al, 1971;Towns et al, 1977;Choudhury, 1978;Payne, 1993;Rosa, 1999;Kahn et al, 2000;Rosa and Tweedale, 2005), LM can be considered homologous to V2. The homology of LM and V2 was suggested previously, based on location (Montero, 1993) and position in the hierarchy of rat extrastriate visual cortex (Coogan and Burkhalter, 1993).…”

Section: Vertical Meridian Representation In V1 Is Confined To V1/lm mentioning

confidence: 99%

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Area map of mouse visual cortex

Wang

Burkhalter

2007

J of Comparative Neurology

451

670

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It is controversial whether mouse extrastriate cortex has a "simple" organization in which lateral primary visual cortex (V1) is adjoined by a single area V2 or has a "complex" organization, in which lateral V1 is adjoined by multiple distinct areas, all of which share the vertical meridian with V1. Resolving this issue is important for understanding the evolution and development of cortical arealization. We have used triple pathway tracing combined with receptive field recordings to map azimuth and elevation in the same brain and have referenced these maps against callosal landmarks. We found that V1 projects to 15 cortical fields. At least nine of these contain maps with complete and orderly representations of the entire visual hemifield and therefore represent distinct areas. One of these, PM, adjoins V1 at the medial border. Five areas, P, LM, AL, RL, and A, adjoin V1 on the lateral border, but only LM shares the vertical meridian representation with V1. This suggests that LM is homologous to V2 and that the lateral extrastriate areas do not represent modules within a single area V2. Thus, mouse visual cortex is "simple" in the sense that lateral V1 is adjoined by a single V2-like area, LM, and "complex" in having a string of areas in lateral extrastriate cortex, which receive direct V1 input. The results suggest that large numbers of areas with topologically equivalent maps of the visual field emerge early in evolution and that homologous areas are inherited in different mammalian lineages.

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Section: Vertical Meridian Representation In V1 Is Confined To V1/lm mentioning

confidence: 93%

Section: Vertical Meridian Representation In V1 Is Confined To V1/lm mentioning

confidence: 99%

Area map of mouse visual cortex

Wang

Burkhalter

2007

J of Comparative Neurology

451

670

View full text Add to dashboard Cite

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“…Moreover, these mismatches are larger in those species with well defined visual streaks such as rabbit and agouti (Hughes, 1977;Picanço-Diniz et al, 1992). Representative examples of V1 maps and retinal ganglion cell isodensity lines adapted from elsewhere, including mouse (Drager & Olsen, 1981 (Tiao & Blakemore, 1976 a,b), guinea-pig (Choudhury, 1978), agouti (Picanco-Diniz et al, 1991)and rabbit (Hughes, 1971) illustrate this point. Two of those species belong to Hystrichomorpha (agouti and guinea-pig), three belong to Myomorpha (rat, hamster and mouse) and one to the Sciurumorpha sub-order (grey squirrel).…”

Section: Asymmetric Representation Of the Contralateral Visual Field mentioning

confidence: 84%

“…Figure 7 illustrates detailed V1 maps and retinal ganglion cell topography for hamster (Tiao & Blakemore, 1976 a,b) and rabbit (Hughes, 1971). Other the even (Picanço Diniz 1987) and (Silveira 1985)) and guinea pig (B, B'; modified from (Choudhury 1978)). Isodensity lines (indicated by numbers or letters ) correspond to the distribution of retinal ganglion cells x 10 3 and x 10 2 in the agouti and guinea pig respectively.…”

Section: Asymmetric Representation Of the Contralateral Visual Field mentioning

confidence: 99%

Cortical representation of the horizon in V1 and peripheral scaling in mammals with lateral eyes.

Rocha

Silveira

Elston³

et al. 2011

Psychology & Neuroscience

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In the present investigation we mapped the primary visual area of the South American diurnal rodent, Dasyprocta aguti, by standardized electrophysiological mapping techniques. In particular, we performed a series of mapping experiments of the visual streak in the primary visual cortex. We found that the representation of the visual streak in V1 is greatly expanded, the nasal 10 degrees of the visual streak representation occupies ten times more cortical area than equivalent areas in the central or temporal representation. Comparison of these data with those on the density of ganglion cells in the retina at corresponding locations in the visual field reveal a significant mismatch between these two variables. The nasal representation is greatly expanded along the horizontal meridian in V1 as compared to the central and temporal regions whereas the density of ganglion cells decreases with progression along the visual streak from central region towards the nasal or temporal visual field. A review of the available data reveals that all lateral-eyed mammals exhibit a similar mismatch between the retinal and cortical representation of the visual field, and this mismatches is greater in those species with well defined visual streaks such as rabbit and agouti.

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“…Guinea pigs live in burrows and feed at dawn and dusk in their natural habitat (Finlay and Sengelaub 1981). They do not have foveas; their retinas are relatively homogeneous and have a low density of photoreceptors, primarily rods (Choudhury 1978;Hughes 1977); and they have poor visual acuity (estimated maximally at 2.7 c/°; Buttery et al 1991). Consistent with this morphology and lifestyle, guinea pigs make few spontaneous saccades and do not produce smooth pursuit eye movements (Escudero et al 1993).…”

Section: Functional Role Of Retinal Stability In the Guinea Pigmentioning

confidence: 95%