Shape processing in the human motion area MT/MST

Zoe Kourtzi, Heinrich Bulthoff, Michael Erb, Wolfgang Grodd

Research output: Contribution to journalArticle

Abstract

Perception of object motion requires that the visual system integrates shape and motion information about objects. However, recent fMRI studies have implicated separate human brain regions in the analysis of motion (MT/MST) and shape (lateral occipital complex-LOC). We tested whether MT/MST is involved in the analysis of both object shape and motion using fMRI. We observed higher responses to intact than scrambled images of objects in the LOC and MT/MST, especially in a ventral subregion of MT/MST, suggesting that regions involved mainly in the processing of visual motion are also engaged in the analysis of object shape. These object selective responses in MT/MST were observed for moving objects and static 3D objects defined by disparity or shading but not for 2D silhouettes of objects. In contrast, these object selective responses were observed in the LOC for all of these object types. Further studies tested responses to shapes defined by different cues (i.e. disparity, motion or shading) by using event-related fMRI adaptation. Lower responses for the same shape defined by different cues than two different consecutively-presented stimuli implicate neural representations of shapes independent of the cues that define their contours. Our findings suggest differential processing of visual shape in the LOC and MT/MST.

Original languageEnglish
JournalJournal of Vision
Volume2
Issue number7
DOIs
Publication statusPublished - 2002 Dec 1
Externally publishedYes

Fingerprint

Cues
Magnetic Resonance Imaging
Motion Perception
Brain

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Shape processing in the human motion area MT/MST. / Kourtzi, Zoe; Bulthoff, Heinrich; Erb, Michael; Grodd, Wolfgang.

In: Journal of Vision, Vol. 2, No. 7, 01.12.2002.

Research output: Contribution to journalArticle

Kourtzi, Zoe ; Bulthoff, Heinrich ; Erb, Michael ; Grodd, Wolfgang. / Shape processing in the human motion area MT/MST. In: Journal of Vision. 2002 ; Vol. 2, No. 7.
@article{bdfa5a1dd917472197fb86b9630a7025,
title = "Shape processing in the human motion area MT/MST",
abstract = "Perception of object motion requires that the visual system integrates shape and motion information about objects. However, recent fMRI studies have implicated separate human brain regions in the analysis of motion (MT/MST) and shape (lateral occipital complex-LOC). We tested whether MT/MST is involved in the analysis of both object shape and motion using fMRI. We observed higher responses to intact than scrambled images of objects in the LOC and MT/MST, especially in a ventral subregion of MT/MST, suggesting that regions involved mainly in the processing of visual motion are also engaged in the analysis of object shape. These object selective responses in MT/MST were observed for moving objects and static 3D objects defined by disparity or shading but not for 2D silhouettes of objects. In contrast, these object selective responses were observed in the LOC for all of these object types. Further studies tested responses to shapes defined by different cues (i.e. disparity, motion or shading) by using event-related fMRI adaptation. Lower responses for the same shape defined by different cues than two different consecutively-presented stimuli implicate neural representations of shapes independent of the cues that define their contours. Our findings suggest differential processing of visual shape in the LOC and MT/MST.",
author = "Zoe Kourtzi and Heinrich Bulthoff and Michael Erb and Wolfgang Grodd",
year = "2002",
month = "12",
day = "1",
doi = "10.1167/2.7.122",
language = "English",
volume = "2",
journal = "Journal of Vision",
issn = "1534-7362",
publisher = "Association for Research in Vision and Ophthalmology Inc.",
number = "7",

}

TY - JOUR

T1 - Shape processing in the human motion area MT/MST

AU - Kourtzi, Zoe

AU - Bulthoff, Heinrich

AU - Erb, Michael

AU - Grodd, Wolfgang

PY - 2002/12/1

Y1 - 2002/12/1

N2 - Perception of object motion requires that the visual system integrates shape and motion information about objects. However, recent fMRI studies have implicated separate human brain regions in the analysis of motion (MT/MST) and shape (lateral occipital complex-LOC). We tested whether MT/MST is involved in the analysis of both object shape and motion using fMRI. We observed higher responses to intact than scrambled images of objects in the LOC and MT/MST, especially in a ventral subregion of MT/MST, suggesting that regions involved mainly in the processing of visual motion are also engaged in the analysis of object shape. These object selective responses in MT/MST were observed for moving objects and static 3D objects defined by disparity or shading but not for 2D silhouettes of objects. In contrast, these object selective responses were observed in the LOC for all of these object types. Further studies tested responses to shapes defined by different cues (i.e. disparity, motion or shading) by using event-related fMRI adaptation. Lower responses for the same shape defined by different cues than two different consecutively-presented stimuli implicate neural representations of shapes independent of the cues that define their contours. Our findings suggest differential processing of visual shape in the LOC and MT/MST.

AB - Perception of object motion requires that the visual system integrates shape and motion information about objects. However, recent fMRI studies have implicated separate human brain regions in the analysis of motion (MT/MST) and shape (lateral occipital complex-LOC). We tested whether MT/MST is involved in the analysis of both object shape and motion using fMRI. We observed higher responses to intact than scrambled images of objects in the LOC and MT/MST, especially in a ventral subregion of MT/MST, suggesting that regions involved mainly in the processing of visual motion are also engaged in the analysis of object shape. These object selective responses in MT/MST were observed for moving objects and static 3D objects defined by disparity or shading but not for 2D silhouettes of objects. In contrast, these object selective responses were observed in the LOC for all of these object types. Further studies tested responses to shapes defined by different cues (i.e. disparity, motion or shading) by using event-related fMRI adaptation. Lower responses for the same shape defined by different cues than two different consecutively-presented stimuli implicate neural representations of shapes independent of the cues that define their contours. Our findings suggest differential processing of visual shape in the LOC and MT/MST.

UR - http://www.scopus.com/inward/record.url?scp=4243170076&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243170076&partnerID=8YFLogxK

U2 - 10.1167/2.7.122

DO - 10.1167/2.7.122

M3 - Article

VL - 2

JO - Journal of Vision

JF - Journal of Vision

SN - 1534-7362

IS - 7

ER -