Topography and architecture of visual and somatosensory areas of the agouti

Dias, Ivanira Amaral; Bahia, Carlomagno Pacheco; Franca, João G.; Houzel, Jean-Christophe; Lent, Roberto; Mayer, Andrei; Santiago, Lucídia Fonseca; Silveira, Luiz Carlos de Lima; Pereira, Antônio

doi:10.1002/cne.23550

Cited by 12 publications

(9 citation statements)

References 81 publications

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“…Taken together, there is widespread evidence that PFC connections display clear ordering with both cortical and subcortical sites. This is consistent with other regions of the cerebral cortex where topographically/topologically arranged connections (Henry and Catania, 2006 ; Thivierge and Marcus, 2007 ; Aronoff et al, 2010 ) are hypothesized to support physiological maps (Woolsey, 1967 ; Welker, 1971 ; Hafting et al, 2005 ; Marshel et al, 2011 ; Dias et al, 2014 ). To our knowledge this study is the first to simultaneously report on the ordering of anterograde and retrograde labeling in temporal cortex following PFC injections.…”

Section: Discussionsupporting

confidence: 80%

The topology of connections between rat prefrontal and temporal cortices

Bedwell

Billett

Crofts

et al. 2015

Front. Syst. Neurosci.

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Understanding the structural organization of the prefrontal cortex (PFC) is an important step toward determining its functional organization. Here we investigated the organization of PFC using different neuronal tracers. We injected retrograde (Fluoro-Gold, 100 nl) and anterograde [Biotinylated dextran amine (BDA) or Fluoro-Ruby, 100 nl] tracers into sites within PFC subdivisions (prelimbic, ventral orbital, ventrolateral orbital, dorsolateral orbital) along a coronal axis within PFC. At each injection site one injection was made of the anterograde tracer and one injection was made of the retrograde tracer. The projection locations of retrogradely labeled neurons and anterogradely labeled axon terminals were then analyzed in the temporal cortex: area Te, entorhinal and perirhinal cortex. We found evidence for an ordering of both the anterograde (anterior-posterior, dorsal-ventral, and medial-lateral axes: p < 0.001) and retrograde (anterior-posterior, dorsal-ventral, and medial-lateral axes: p < 0.001) connections of PFC. We observed that anterograde and retrograde labeling in ipsilateral temporal cortex (i.e., PFC inputs and outputs) often occurred reciprocally (i.e., the same brain region, such as area 35d in perirhinal cortex, contained anterograde and retrograde labeling). However, often the same specific columnar temporal cortex regions contained only either labeling of retrograde or anterograde tracer, indicating that PFC inputs and outputs are frequently non-matched.

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Section: Discussionsupporting

confidence: 80%

The topology of connections between rat prefrontal and temporal cortices

Bedwell

Billett

Crofts

et al. 2015

Front. Syst. Neurosci.

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“…The densely myelinated area we observed in Te3 may correspond to a heavily myelinated area, called TP (temporal posterior), described in approximately this region in the squirrel [ 67 , 68 ] and agouti [ 69 ]. The portion connected with V1 may correspond to a visually responsive area in rabbit temporal cortex described in previous physiological and anatomical studies [ 33 , 34 ].…”

Section: Discussionmentioning

confidence: 93%

Visual Interhemispheric and Striate-Extrastriate Cortical Connections in the Rabbit: A Multiple Tracer Study

Andelin

Bruning

Felleman

et al. 2015

Neurology Research International

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Previous studies in rabbits identified an array of extrastriate cortical areas anatomically connected with V1 but did not describe their internal topography. To address this issue, we injected multiple anatomical tracers into different regions in V1 of the same animal and analyzed the topography of resulting extrastriate labeled fields with reference to the patterns of callosal connections and myeloarchitecture revealed in tangential sections of the flattened cortex. Our results extend previous studies and provide further evidence that rabbit extrastriate areas resemble the visual areas in rats and mice not only in their general location with respect to V1 but also in their internal topography. Moreover, extrastriate areas in the rabbit maintain a constant relationship with myeloarchitectonic borders and features of the callosal pattern. These findings highlight the rabbit as an alternative model to rats and mice for advancing our understanding of cortical visual processing in mammals, especially for projects benefiting from a larger brain.

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“…In other studies, the OT region was called area 19 (Kaas et al ., ; Wong & Kaas, ). However, we prefer to maintain the nomenclature of OTc instead of using the terms V3 or area 19 as evidence for a V3/area 19 in other rodents and tree shrews, a close relative to primates, is lacking (Sesma et al ., ; Montero, ; Lyon et al ., ; Baldwin et al ., ; Wang & Burkhalter, ; Dias et al ., ). Therefore, OTc may not be homologous to V3 (area 19) described in primates but instead may be a derived feature of the highly visual squirrel.…”

Section: Discussionmentioning

confidence: 97%

Cortical projections to the superior colliculus in grey squirrels (Sciurus carolinensis)

Baldwin

Young

Matrov

et al. 2018

Eur J of Neuroscience

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The superior colliculus is an important midbrain structure involved with integrating information from varying sensory modalities and sending motor signals to produce orienting movements towards environmental stimuli. Because of this role, the superior colliculus receives a multitude of sensory inputs from a wide variety of subcortical and cortical structures. Proportionately, the superior colliculus of grey squirrels is among the largest in size of all studied mammals, suggesting the importance of this structure in the behavioural characteristics of grey squirrels. Yet, our understanding of the connections of the superior colliculus in grey squirrels is lacking, especially with respect to possible cortical influences. In this study, we placed anatomical tracer injections within the medial aspect of the superior colliculus of five grey squirrels (Sciurus carolinensis) and analysed the areal distribution of corticotectal projecting cells in flattened cortex. V1 projections to the superior colliculus were studied in two additional animals. Our results indicate that the superior colliculus receives cortical projections from visual, higher order somatosensory, and higher order auditory regions, as well as limbic, retrosplenial and anterior cingulate cortex. Few, if any, corticotectal projections originate from primary motor, primary somatosensory or parietal cortical regions. This distribution of inputs is similar to the distribution of inputs described in other rodents such as rats and mice, yet the lack of inputs from primary somatosensory and motor cortex is features of corticotectal inputs more similar to those observed in tree shrews and primates, possibly reflecting a behavioural shift from somatosensory (vibrissae) to visual navigation.

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Topography and architecture of visual and somatosensory areas of the agouti

Cited by 12 publications

References 81 publications

The topology of connections between rat prefrontal and temporal cortices

The topology of connections between rat prefrontal and temporal cortices

Visual Interhemispheric and Striate-Extrastriate Cortical Connections in the Rabbit: A Multiple Tracer Study

Cortical projections to the superior colliculus in grey squirrels (Sciurus carolinensis)

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