The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.
A Comparative Study of Shape Representation in Macaque Visual Areas V2 and V4
Abstract
We compared aspects of shape representation in extrastriate visual areas V2 and V4, which are both implicated in shape processing and belong to different hierarchical levels. We recorded responses of cells in awake, fixating monkeys to matched sets of contour and grating stimuli of low or intermediate complexity. These included simple stimuli (bars and sinusoids) and more complex stimuli (angles, intersections, arcs, and non-Cartesian gratings), all scaled to receptive field size. The responses of cells within each area were substantially modulated by each shape characteristic tested, with substantial overlap between areas by many response measures. Our analyses revealed many clear and reliable differences between areas in terms of the effectiveness of, and response modulation by, various shape characteristics. Grating stimuli were on average more effective than contour stimuli in V2 and V4, but the difference was more pronounced in V4. As a population, V4 showed greater response modulation by some shape characteristics (including simple shape characteristics) and V2 showed greater response modulation by many others (including complex shape characteristics). Recordings from area V1 demonstrated complex shape selectivity in some cells and relatively modest population differences in comparison with V2. Altogether, the representation of 2-dimensional shape characteristics revealed by this analysis varies substantially among the 3 areas. But surprisingly, the differences revealed by our analyses, individually or collectively, do not parallel the stepwise organization of the anatomical hierarchy. Commonalities of visual shape representation across hierarchical levels may reflect the replication of neural circuits used in generating complex shape representations at multiple spatial scales.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
‘What’ and ‘where’ in the human brain
Ungerleider, L. G., & Haxby, J. V. (1994) · Current Opinion in Neurobiology · doi:10.1016/0959-4388(94)90066-3 · Cited by 1,913 · cited 1×
“…to the functional specializations of each area, a number of complex receptive field characteristics have been described in higher levels that appear to be absent or less prevalent at lower levels (Felleman and Van Essen 1991; Ungerleider and Haxby 1994; Van Essen and Gallant 1994; see Discussion).”
BackgroundNeural mechanisms of spatial selective attention in areas V1, V2, and V4 of macaque visual cortex
Luck, S. J., Chelazzi, L., Hillyard, S. A., & Desimone, R. (1997) · Journal of Neurophysiology · doi:10.1152/jn.1997.77.1.24 · Cited by 1,615
Maunsell, J., & van Essen, D. (1983) · The Journal of Neuroscience · doi:10.1523/jneurosci.03-12-02563.1983 · Cited by 1,602
Signal timing across the macaque visual system
Schmolesky, M. T., Wang, Y., Hanes, D. P., Thompson, K. G., Leutgeb, S., Schall, J. D., & Leventhal, A. G. (1998) · Journal of Neurophysiology · doi:10.1152/jn.1998.79.6.3272 · Cited by 1,032
Population coding of shape in area V4
Pasupathy, A., & Connor, C. E. (2002) · Nature Neuroscience · doi:10.1038/972 · Cited by 552
Cited by
Guclu, U., & van Gerven, M. A. J. (2015) · Journal of Neuroscience · doi:10.1523/jneurosci.5023-14.2015 · Cited by 961
Representational geometry: integrating cognition, computation, and the brain
Kriegeskorte, N., & Kievit, R. A. (2013) · Trends in Cognitive Sciences · doi:10.1016/j.tics.2013.06.007 · Cited by 911
The Interactive Account of ventral occipitotemporal contributions to reading
Price, C. J., & Devlin, J. T. (2011) · Trends in Cognitive Sciences · doi:10.1016/j.tics.2011.04.001 · Cited by 720
A functional and perceptual signature of the second visual area in primates
Freeman, J., Ziemba, C. M., Heeger, D. J., Simoncelli, E. P., & Movshon, J. A. (2013) · Nature Neuroscience · doi:10.1038/nn.3402 · Cited by 340
Analogous intermediate shape coding in vision and touch
Yau, J. M., Pasupathy, A., Fitzgerald, P. J., Hsiao, S. S., & Connor, C. E. (2009) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0904186106 · Cited by 77
Metadata
- Authors
- Hegdé, J., & Van Essen, D. C.
- Venue
- Cerebral Cortex
- Publisher
- Oxford University Press (OUP)
- Published
- 2006-06-19
- Volume
- 17
- Issue
- 5
- Pages
- 1100-1116
- ISSN
- 1047-3211 (ISSN-L)
- 1460-2199
- OpenAlex
- W2097927828
- Cited by
- 172
- References
- 5
- FWCI
- 3.99
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: A Comparative Study of Shape Representation in Macaque Visual Areas V2 and V4. https://app.cochat.ai/papers/10.1093/cercor/bhl020
- The paper
- Hegdé, J., & Van Essen, D. C. (2007). A Comparative Study of Shape Representation in Macaque Visual Areas V2 and V4. Cerebral Cortex. https://doi.org/10.1093/cercor/bhl020
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
