The afferent connexions and laminar distribution of cells in area 18 of the cat.

Harvey, A.R.

doi:10.1113/jphysiol.1980.sp013257

Cited by 53 publications

(54 citation statements)

References 48 publications

(71 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dreher et al 1992;Harvey 1980). Although consistent with Harvey's (1980) report, the proportion of thus-identified binocular neurons among presumptive simple cells (F1/F0 spike-response ratios Ͼ 1; see below) was lower (69/88, 78.5%) than that (36/41, 88%) among presumptive complex cells (F1/F0 spike-response ratios Ͻ 1; see below), the difference between the two groups was not significant (0.2 Ͻ P Ͻ 0.3; df ϭ 1; 2 test, 1-tailed criterion). Figure 2A shows the peristimulus time histogram (PSTH) of spike responses of strongly phase-variant area 18 cells to optimized sine-wave luminance-modulated grating patch.…”

Section: Resultsmentioning

confidence: 99%

“…Bardy et al 2006;De Valois et al 1982;Movshon et al 1978aMovshon et al , 1978bSkottun et al 1991). By contrast, there is a degree of controversy concerning paucity (e.g., Hubel and Wiesel 1965) or otherwise (see for reviews Dreher 1986;Harvey 1980;Orban 1984;Payne and Peters 2002) of simple cells in area 18, and to our knowledge, there are no published records of the frequency distribution of strength of phase sensitivity of area 18 neurons to stimulation with luminance-modulated, sine-wave gratings.…”

mentioning

confidence: 88%

“…Similarly, the proportion of area 18 cells that exhibited F1/F0 spike-response ratios Ͻ1 when optimized gratings were used (32%) is only slightly lower than the combined proportion (ϳ39%) of area 18 cells identified as C (or C H ) and B (or B H ) cells by Harvey (1980). According to Harvey (1980), "both C and B cells have spatially coincident light and dark edge response regions and give mixed ON and OFF discharges when tested with stationary flashing stimuli." Our complex cells with high (Ն75%) SIs are not only characterized by relatively small sRFs, but like B cells of Harvey (cf.…”

Section: F1/f0 Spike-response Ratios Vs Spatial Overlap Of On and Ofmentioning

confidence: 99%

“…Overall, the proportion of area 18 cells that exhibited F1/F0 spike-response ratios to optimized gratings Ͼ1 (67.5%) is only slightly higher than the proportion (ϳ61%) of area 18 cells identified ("spatially separate light edge and/or dark edge response regions when tested with moving edges") as S (simple) or S H (end-stopped simple cells) in a much larger sample of cells recorded in long, oblique penetrations through the part of area 18 located in the medial bank of the marginal sulcus (Harvey 1980;cf. Orban and Kennedy 1981).…”

Section: F1/f0 Spike-response Ratios Vs Spatial Overlap Of On and Ofmentioning

confidence: 99%

“…Although the presence of silent suppressive regions in the receptive fields of at least some of cat area 18 neurons is well established (Camarda 1979;Dreher et al 1992;Hammond and Andrews 1978;Harvey 1980;Hubel and Wiesel 1965;Orban and Callens 1977), the amount of quantitative information about the properties of ECRFs of area 18 neurons is very limited.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Phase sensitivities, excitatory summation fields, and silent suppressive receptive fields of single neurons in the parastriate cortex of the cat

Romo

Wang

Zeater

et al. 2011

Journal of Neurophysiology

View full text Add to dashboard Cite

Romo PA, Wang C, Zeater N, Solomon SG, Dreher B. Phase sensitivities, excitatory summation fields, and silent suppressive receptive fields of single neurons in the parastriate cortex of the cat. J Neurophysiol 106: 1688 -1712, 2011. First published June 29, 2011 doi:10.1152/jn.00894.2010We have recorded single-neuron activity from cytoarchitectonic area 18 of anesthetized (0.4 -0.7% isoflurane in 65% N 2 O-35% O 2 gaseous mixture) domestic cats. Neurons were identified as simple or complex on the basis of the ratios between the phase-variant (F1) component and the mean firing rate (F0) of spike responses to optimized (orientation, direction, spatial and temporal frequencies, size) high-contrast, luminance-modulated, sinewave drifting gratings (simple: F1/F0 spike-response ratios Ͼ 1; complex: F1/F0 spike-response ratios Ͻ 1). The predominance (ϳ80%) of simple cells among the neurons recorded from the principal thalamorecipient layers supports the idea that most simple cells in area 18 might constitute a putative early stage in the visual information processing. Apart from the "spike-generating" regions (the classical receptive fields, CRFs), the receptive fields of threequarters of area 18 neurons contain silent, extraclassical suppressive regions (ECRFs). The spatial extent of summation areas of excitatory responses was negatively correlated with the strength of the ECRFinduced suppression of spike responses. Lowering the stimulus contrast resulted in an expansion of the summation areas of excitatory responses accompanied by a reduction in the strength of the ECRFinduced suppression. The spatial and temporal frequency and orientation tunings of the ECRFs were much broader than those of the CRFs. Hence, the ECRFs of area 18 neurons appear to be largely "inherited" from their dorsal thalamic inputs. In most area 18 cells, costimulation of CRFs and ECRFs resulted in significant increases in F1/F0 spike-response ratios, and thus there was a contextually modulated functional continuum between the simple and complex cells. luminance-modulated gratings; simple and complex cells; spatial and temporal properties; classical and extraclassical receptive fields; primary visual cortex HUBEL AND WIESEL (1965) postulated that in the domestic cat, the so-called parastriate cortex (cytoarchitectonic area 18 of Gurewitsch and Chatschaturian 1928; cf. Otsuka and Hässler 1962) constitutes a "higher order" visual cortical area (Fig.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 88%

Section: F1/f0 Spike-response Ratios Vs Spatial Overlap Of On and Ofmentioning

confidence: 99%

Section: F1/f0 Spike-response Ratios Vs Spatial Overlap Of On and Ofmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Phase sensitivities, excitatory summation fields, and silent suppressive receptive fields of single neurons in the parastriate cortex of the cat

Romo

Wang

Zeater

et al. 2011

Journal of Neurophysiology

View full text Add to dashboard Cite

show abstract

Laminar and columnar patterns of geniculocortical projections in the cat: Relationship to cytochrome oxidase

Boyd

Matsubara

1996

J. Comp. Neurol.

View full text Add to dashboard Cite

We examined the laminar and columnar arrangement of projections from different layers of the lateral geniculate nucleus (LGN) to the visual cortex in the cat. In light of recent reports that cytochrome oxidase blobs (which in primates receive specific geniculate inputs) are also found in the visual cortex of cats, the relationship between cytochrome oxidase staining and geniculate inputs in this species was studied. Injections of wheat germ agglutinin-conjugated horseradish peroxidase were made into the anterior "genu" of the LGN, where isoelevation contours of the geniculate layers are distorted due to the curvature of the nucleus. Consequently, anterograde labeling from the various LGN layers was topographically separated across the surface of the cortex, and labeling in a particular isoelevation representation of the cortex could be associated with a specific layer of the LGN. Labeling from the A layers, which contain X and Y cells, was coextensive with layers 4 and 6 in both area 17 and area 18, as previously reported. Labeling from the C layers, which contain Y and W cells, occupied a zone extending from the 4a/4b border to part way into layer 3 in area 17. The labeling extended throughout layer 4 in area 18. There was also labeling in layer 5a and layer 1 in both area 17 and area 18. Except in layer 1, labeling from the C layers was patchy. In the tangential plane, adjacent sections stained for cytochrome oxidase showed that the patches of labeling from the C laminae aligned with the cytochrome oxidase blobs. The cytochrome blobs were visible in layers 3 and 4a, but not in layer 4b in both areas 17 and 18. These results suggest that W cells project specifically to the layer 3 portion of the blobs, while Y cells, at least those of the C layers, project specifically to the layer 4a portion of the blobs in area 17. The heavy synaptic drive of the Y cells is probably the cause of the elevated metabolism, and thus, higher cytochrome oxidase activity, of the blobs.

show abstract

Laminar and columnar patterns of geniculocortical projections in the cat: Relationship to cytochrome oxidase

Boyd

Matsubara

1996

J. Comp. Neurol.

View full text Add to dashboard Cite

show abstract

The afferent connexions and laminar distribution of cells in area 18 of the cat.

Cited by 53 publications

References 48 publications

Phase sensitivities, excitatory summation fields, and silent suppressive receptive fields of single neurons in the parastriate cortex of the cat

Phase sensitivities, excitatory summation fields, and silent suppressive receptive fields of single neurons in the parastriate cortex of the cat

Laminar and columnar patterns of geniculocortical projections in the cat: Relationship to cytochrome oxidase

Laminar and columnar patterns of geniculocortical projections in the cat: Relationship to cytochrome oxidase

Contact Info

Product

Resources

About