Fine-grained stimulus representations in body selective areas of human occipito-temporal cortex

Caspari, Natalie; Popivanov, Ivo; Mazière, Patrick De; Vanduffel, Wim; Vogels, Rufin; Orban, Guy A.; Jastorff, Jan

doi:10.1016/j.neuroimage.2014.07.066

Cited by 21 publications

(24 citation statements)

References 60 publications

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“…The kinematics main‐effect activated posterior STS and STG of the left hemisphere, while the configuration main‐effect activated regions caudal to hMT+ and OTS/fusiform gyrus predominantly on the right. These results are in agreement with Jastorff and Orban [] indicating that the kinematics cue predominantly activated a strip of cortex crossing posterior MTG, STS, and STG, probably corresponding to rostral monkey STS upper bank, while configuration primarily activated the OTS/fusiform gyrus overlapping with LOC, putatively identified as the homologue of rostral monkey STS lower bank [Caspari et al, ; Jastorff et al, ; Vanduffel et al, ].…”

Section: Discussionsupporting

confidence: 89%

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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Section: Discussionsupporting

confidence: 89%

Seeing biological actions in 3 D : An f MRI study

et al. 2015

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“…The midSTS body patch is a possible homolog of the human extrastriate body area (EBA) (8). Our data can assist interpretations …”

Section: Discussionmentioning

confidence: 71%

“…body perception | body selective area | feature selectivity | macaque | inferior temporal cortex T he body category-selective regions in the human occipitotemporal cortex are defined as those that respond to images of bodies (1)(2)(3)(4)(5)(6)(7)(8). We previously identified two bilateral regions in the macaque inferotemporal cortex that respond stronger to monkey, human, and animal bodies in comparison with other stimuli, including faces (6).…”

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confidence: 99%

Stimulus features coded by single neurons of a macaque body category selective patch

Popivanov

Schyns

Vogels

2016

Proc. Natl. Acad. Sci. U.S.A.

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Body category-selective regions of the primate temporal cortex respond to images of bodies, but it is unclear which fragments of such images drive single neurons' responses in these regions. Here we applied the Bubbles technique to the responses of single macaque middle superior temporal sulcus (midSTS) body patch neurons to reveal the image fragments the neurons respond to. We found that local image fragments such as extremities (limbs), curved boundaries, and parts of the torso drove the large majority of neurons. Bubbles revealed the whole body in only a few neurons. Neurons coded the features in a manner that was tolerant to translation and scale changes. Most image fragments were excitatory but for a few neurons both inhibitory and excitatory fragments (opponent coding) were present in the same image. The fragments we reveal here in the body patch with Bubbles differ from those suggested in previous studies of face-selective neurons in face patches. Together, our data indicate that the majority of body patch neurons respond to local image fragments that occur frequently, but not exclusively, in bodies, with a coding that is tolerant to translation and scale. Overall, the data suggest that the body category selectivity of the midSTS body patch depends more on the feature statistics of bodies (e.g., extensions occur more frequently in bodies) than on semantics (bodies as an abstract category).body perception | body selective area | feature selectivity | macaque | inferior temporal cortex

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“…To this end, every stimulus was modeled as a separate condition (30 t-images; 4 emotions 3 6 actors 1 1 neutral 3 6 actors). The t-scores of all voxels of a given ROI for a particular stimulus were concatenated across subjects, resulting in a single activation vector per stimulus and per ROI across subjects [Caspari et al, 2014]. The length of this vector was given by the sum of the voxels included in the ROI over subjects.…”

Section: Classification Of the Emotion Based On Support Vector Machinesmentioning

confidence: 99%

Functional dissociation between anterior temporal lobe and inferior frontal gyrus in the processing of dynamic body expressions: Insights from behavioral variant frontotemporal dementia

Jastorff

Winter

Stock

et al. 2016

Human Brain Mapping

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Several brain regions are involved in the processing of emotional stimuli, however, the contribution of specific regions to emotion perception is still under debate. To investigate this issue, we combined behavioral testing, structural and resting state imaging in patients diagnosed with behavioral variant frontotemporal dementia (bvFTD) and age matched controls, with task-based functional imaging in young, healthy volunteers. As expected, bvFTD patients were impaired in emotion detection as well as emotion categorization tasks, testing dynamic emotional body expressions as stimuli. Interestingly, their performance in the two tasks correlated with gray matter volume in two distinct brain regions, the left anterior temporal lobe for emotion detection and the left inferior frontal gyrus (IFG) for emotion categorization. Confirming this observation, multivoxel pattern analysis in healthy volunteers demonstrated that both ROIs contained information for emotion detection, but that emotion categorization was only possible from the pattern in the IFG. Furthermore, functional connectivity analysis showed reduced connectivity between the two regions in bvFTD patients. Our results illustrate that the mentalizing network and the action observation network perform distinct tasks during emotion processing. In bvFTD, communication between the networks is reduced, indicating one possible cause underlying the behavioral symptoms. Hum Brain Mapp 37:4472-4486, 2016. © 2016 Wiley Periodicals, Inc.

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Fine-grained stimulus representations in body selective areas of human occipito-temporal cortex

Cited by 21 publications

References 60 publications

Seeing biological actions in 3 D : An f MRI study

Seeing biological actions in 3 D : An f MRI study

Stimulus features coded by single neurons of a macaque body category selective patch

Functional dissociation between anterior temporal lobe and inferior frontal gyrus in the processing of dynamic body expressions: Insights from behavioral variant frontotemporal dementia

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