The Processing of Three-Dimensional Shape from Disparity in the Human Brain

Georgieva, Svetlana; Peeters, Ronald; Kolster, H.; Todd, James T.; Orban, Guy A.

doi:10.1523/jneurosci.4753-08.2009

Cited by 193 publications

(252 citation statements)

References 71 publications

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“…For 10 of the 11 participants, the polar angle and eccentricity maps yielded 18 retinotopic occipital regions (see Materials and Methods), forming a dense map and extending our previous results (Georgieva et al, 2009). These regions did not include V6 (Pitzalis et al, 2006) nor the recently mapped parahippocampal (PH) regions (Arcaro et al, 2009), which require more extended stimuli for activation.…”

Section: Resultssupporting

confidence: 82%

“…2,3), is that of the putative homologs of the PIT (phPIT) areas, and the most ventral one, on the fusiform gyrus ( Fig. 3), is that of the ventral occipital (VO) areas (Wandell et al, 2007;Arcaro et al, 2009;Georgieva et al, 2009). In all subjects, we could discern at least one VO area matching the description of VO1, and in a number of subjects there were indications of VO2 rostral to VO1 (Brewer et al, 2005;Arcaro et al, 2009).…”

Section: Resultsmentioning

confidence: 79%

“…The same applies to the left hemispheres where the only exception was subject 4 whose reversal between pFST and pV4t is shallow. This subject whose map was shown in the study by Georgieva et al (2009) was retested with very similar results (supplemental Fig. S4, available at www.jneurosci.org as supplemental material).…”

Section: Analysis Of Mt/v5 Cluster Using Isopolar Linesmentioning

confidence: 83%

“…Indeed, Figures 2 and 3 show that a polar angle map consistent with a hemifield representation extends dorsally from the central representation of the MT/V5 cluster. Its lower vertical meridian (LVM) is located caudally (i.e., on the side of LO1-2) and the upper vertical meridian (UVM) rostrally, defining the borders of area MT/V5 (Georgieva et al, 2009;Pitzalis et al, 2010). These features are very similar to those of the monkey retinotopic map in which the center of the MT/V5 cluster is separated from V4d by an eccentricity ridge and the lower vertical In C and D, the white lines indicate the isopolar lines of the MT/V5 (n ϭ 16) and phPIT (n ϭ 8) clusters and the LO regions (n ϭ 9).…”

Section: Retinotopic Organization Of the Mt/v5 Clustermentioning

confidence: 99%

“…Finally, the two remaining neighbors of MT/V5 in the human are LO1 and LO2, which have been described previously (Larsson and Heeger, 2006;Georgieva et al, 2009). These retinotopic data are consistent with the view that, in humans, LO1-2 and hV4, respectively, occupy the positions of V4d and V4v in the monkey (Larsson and Heeger, 2006;Wandell et al, 2007).…”

Section: Retinotopic Organization Of Neighboring Areas: Lo and Phpit mentioning

confidence: 99%

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The Retinotopic Organization of the Human Middle Temporal Area MT/V5 and Its Cortical Neighbors

Kolster¹,

Peeters²,

Orban³

2010

Journal of Neuroscience

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Although there is general agreement that the human middle temporal (MT)/V5ϩ complex corresponds to monkey area MT/V5 proper plus a number of neighboring motion-sensitive areas, the identification of human MT/V5 within the complex has proven difficult. Here, we have used functional magnetic resonance imaging and the retinotopic mapping technique, which has very recently disclosed the organization of the visual field maps within the monkey MT/V5 cluster. We observed a retinotopic organization in humans very similar to that documented in monkeys: an MT/V5 cluster that includes areas MT/V5, pMSTv (putative ventral part of the medial superior temporal area), pFST (putative fundus of the superior temporal area), and pV4t (putative V4 transitional zone), and neighbors a more ventral putative human posterior inferior temporal area (phPIT) cluster. The four areas in the MT/V5 cluster and the two areas in the phPIT cluster each represent the complete contralateral hemifield. The complete MT/V5 cluster comprises 70% of the motion localizer activation. Human MT/V5 is located in the region bound by lateral, anterior, and inferior occipital sulci and occupies only one-fifth of the motion complex. It shares the basic functional properties of its monkey homolog: receptive field size relative to other areas, response to moving and static stimuli, as well as sensitivity to three-dimensional structure from motion. Functional properties sharply distinguish the MT/V5 cluster from its immediate neighbors in the phPIT cluster and the LO (lateral occipital) regions. Together with similarities in retinotopic organization and topological neighborhood, the functional properties suggest that MT/V5 in human and macaque cortex are homologous.

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 79%

Section: Analysis Of Mt/v5 Cluster Using Isopolar Linesmentioning

confidence: 83%

Section: Retinotopic Organization Of the Mt/v5 Clustermentioning

confidence: 99%

Section: Retinotopic Organization Of Neighboring Areas: Lo and Phpit mentioning

confidence: 99%

See 3 more Smart Citations

The Retinotopic Organization of the Human Middle Temporal Area MT/V5 and Its Cortical Neighbors

Kolster¹,

Peeters²,

Orban³

2010

Journal of Neuroscience

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342

411

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The organization of the posterior parietal cortex devoted to upper limb actions: An fMRI study

Ferri

Rizzolatti

Orban

2015

Human Brain Mapping

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The present fMRI study examined whether upper‐limb action classes differing in their motor goal are encoded by different PPC sectors. Action observation was used as a proxy for action execution. Subjects viewed actors performing object‐related (e.g., grasping), skin‐displacing (e.g., rubbing the skin), and interpersonal upper limb actions (e.g., pushing someone). Observation of the three action classes activated a three‐level network including occipito‐temporal, parietal, and premotor cortex. The parietal region common to observing all three action classes was located dorsally to the left intraparietal sulcus (DIPSM/DIPSA border). Regions specific for observing an action class were obtained by combining the interaction between observing action classes and stimulus types with exclusive masking for observing the other classes, while for regions considered preferentially active for a class the interaction was exclusively masked with the regions common to all observed actions. Left putative human anterior intraparietal was specific for observing manipulative actions, and left parietal operculum including putative human SII region, specific for observing skin‐displacing actions. Control experiments demonstrated that this latter activation depended on seeing the skin being moved and not simply on seeing touch. Psychophysiological interactions showed that the two specific parietal regions had similar connectivities. Finally, observing interpersonal actions preferentially activated a dorsal sector of left DIPSA, possibly the homologue of ventral intraparietal coding the impingement of the target person's body into the peripersonal space of the actor. These results support the importance of segregation according to the action class as principle of posterior parietal cortex organization for action observation and by implication for action execution. Hum Brain Mapp 36:3845–3866, 2015. © 2015 The Authors Human Brain Mapping Published by Wiley Periodicals, Inc.

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Seeing biological actions in 3 D : An f MRI study

et al. 2015

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Precise kinematics or body configuration cannot be recovered from visual input without disparity information. Yet, no imaging study has investigated the role of disparity on action observation. Here, we investigated the interaction between disparity and the main cues of biological motion, kinematics and configuration, in two fMRI experiments. Stimuli were presented as point‐light figures, depicting complex action sequences lasting 21 s. We hypothesized that interactions could occur at any of the three levels of the action observation network, comprising occipitotemporal, parietal and premotor cortex, with premotor cortex being the most likely location. The main effects of kinematics and configuration confirmed that the biological motion sequences activated all three levels of the action observation network, validating our approach. The interaction between configuration and disparity activated only premotor cortex, whereas interactions between kinematics and disparity occurred at all levels of the action observation network but were strongest at the premotor level. Control experiments demonstrated that these interactions could not be accounted for by low level motion in depth, task effects, spatial attention, or eye movements, including vergence. These results underscore the role of premotor cortex in action observation, and in imitating others or responding to their actions. Hum Brain Mapp 37:203–219, 2016. © 2015 The Authors Human Brain Mapping Published by Wiley Periodicals, Inc.

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The Processing of Three-Dimensional Shape from Disparity in the Human Brain

Cited by 193 publications

References 71 publications

The Retinotopic Organization of the Human Middle Temporal Area MT/V5 and Its Cortical Neighbors

The Retinotopic Organization of the Human Middle Temporal Area MT/V5 and Its Cortical Neighbors

The organization of the posterior parietal cortex devoted to upper limb actions: An fMRI study

Seeing biological actions in 3 D : An f MRI study

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