Neurons in monkey visual area V2 encode combinations of orientations

2007 ◽  
Vol 10 (10) ◽  
pp. 1313-1321 ◽  
Author(s):  
Akiyuki Anzai ◽  
Xinmiao Peng ◽  
David C Van Essen
Keyword(s):  
Visual Area ◽  
Area V2

Projections from the cytochrome oxidase modules of visual area V2 to the ventral posterior area in the macaque

2004 ◽  
Vol 155 (1) ◽  
pp. 102-110 ◽  
Author(s):  
Hiroyuki Nakamura ◽  
Wu Ri Le ◽  
Masumi Wakita ◽  
Akichika Mikami ◽  
Kazuo Itoh
Keyword(s):  
Cytochrome Oxidase ◽  
Visual Area ◽  
Area V2 ◽  
Posterior Area

scholarly journals Border Ownership from Intracortical Interactions in Visual Area V2

Neuron ◽  
2005 ◽  
Vol 47 (1) ◽  
pp. 143-153 ◽  
Author(s):  
Li Zhaoping
Keyword(s):  
Visual Area ◽  
Area V2

Temporal Dynamics of Shape Analysis in Macaque Visual Area V2

2004 ◽  
Vol 92 (5) ◽  
pp. 3030-3042 ◽  
Author(s):  
Jay Hegdé ◽  
David C. Van Essen
Keyword(s):  
Cortical Neurons ◽  
Time Course ◽  
Temporal Dynamics ◽  
Visual Stimulation ◽  
Signal To Noise Ratio ◽  
Stimulus Onset ◽  
Visual Area ◽  
Response Modulation ◽  
Population Response ◽  
Area V2

The firing rate of visual cortical neurons typically changes substantially during a sustained visual stimulus. To assess whether, and to what extent, the information about shape conveyed by neurons in visual area V2 changes over the course of the response, we recorded the responses of V2 neurons in awake, fixating monkeys while presenting a diverse set of static shape stimuli within the classical receptive field. We analyzed the time course of various measures of responsiveness and stimulus-related response modulation at the level of individual cells and of the population. For a majority of V2 cells, the response modulation was maximal during the initial transient response (40–80 ms after stimulus onset). During the same period, the population response was relatively correlated, in that V2 cells tended to respond similarly to specific subsets of stimuli. Over the ensuing 80–100 ms, the signal-to-noise ratio of individual cells generally declined, but to a lesser degree than the evoked-response rate during the corresponding time bins, and the response profiles became decorrelated for many individual cells. Concomitantly, the population response became substantially decorrelated. Our results indicate that the information about stimulus shape evolves dynamically and relatively rapidly in V2 during static visual stimulation in ways that may contribute to form discrimination.

scholarly journals Neuronal Responses in Visual Area V2 (V2) of Macaque Monkeys with Strabismic Amblyopia

2011 ◽  
Vol 21 (9) ◽  
pp. 2033-2045 ◽  
Author(s):  
H. Bi ◽  
B. Zhang ◽  
X. Tao ◽  
R. S. Harwerth ◽  
E. L. Smith ◽  
...  
Keyword(s):  
Visual Area ◽  
Neuronal Responses ◽  
Strabismic Amblyopia ◽  
Macaque Monkeys ◽  
Area V2

Organization of callosal linkages in visual area V2 of macaque monkey

2000 ◽  
Vol 428 (2) ◽  
pp. 278-293 ◽  
Author(s):  
Paul L. Abel ◽  
Brendan J. O'Brien ◽  
Jaime F. Olavarria
Keyword(s):  
Macaque Monkey ◽  
Visual Area ◽  
Area V2

scholarly journals Corticocortical connection patterns reveal two distinct visual cortical areas bordering dorsal V2 in marmoset monkey

2015 ◽  
Vol 32 ◽  
Author(s):  
JANELLE JEFFS ◽  
FREDERICK FEDERER ◽  
ALESSANDRA ANGELUCCI
Keyword(s):  
Visual Area ◽  
New World Primates ◽  
Lower Field ◽  
Visual Stream ◽  
Field Representation ◽  
Lower Quadrant ◽  
The Third ◽  
Dorsal Aspect ◽  
Area V2 ◽  
Visual Cortical

AbstractThe organization of the cortex located immediately anterior to the second visual area (V2), i.e., the third tier visual cortex, remains controversial, especially in New World primates. In particular, there is lack of consensus regarding the exact location and extent of the lower visual quadrant representation of the third visual area V3 (or ventrolateral posterior –VLP – of a different nomenclature). Microelectrode and connectional mapping studies have revealed the existence of an upper visual quadrant representation abutting dorsal V2 anteriorly, and bordered medially and laterally by representations of the lower visual quadrant. It remains unclear whether these lower field regions are both part of a single area V3, which is split into two patches by an interposed region of upper field representation, or whether they are the lower field representations of two different areas, the dorsomedial area (DM) and area V3/VLP, respectively. To address this question, we quantitatively analyzed the patterns of corticocortical afferent connections labeled by tracer injections targeted to these two lower field regions in the dorsal aspect of the third tier cortex. We found different inter-areal connectivity patterns arising from these two regions, strongly suggesting that they belong to two different visual areas. In particular, our results indicate that the dorsal aspect of the third tier cortex consists of two distinct areas: a full area DM, representing the lower quadrant medially, and the upper quadrant laterally, and the lower quadrant representation of V3/VLP, located laterally to upper field DM. DM is predominantly connected with areas of the dorsal visual stream, and V3/VLP with areas of the ventral stream. These results prompt further functional investigations of the third tier cortex, as previous studies of this cortical territory may have pooled response properties of two very different areas into a single area V3.

scholarly journals Neuronal Responses to Texture-Defined Form in Macaque Visual Area V2

2011 ◽  
Vol 31 (23) ◽  
pp. 8543-8555 ◽  
Author(s):  
Y. El-Shamayleh ◽  
J. A. Movshon
Keyword(s):  
Visual Area ◽  
Neuronal Responses ◽  
Area V2

scholarly journals Cross-orientation suppression in visual area V2

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Ryan J. Rowekamp ◽  
Tatyana O. Sharpee
Keyword(s):  
Visual Area ◽  
Area V2
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