Texture segregation in the human visual cortex: A functional MRI study

被引:129
作者
Kastner, S
De Weerd, P
Ungerleider, LG
机构
[1] NIMH, Lab Brain & Cognit, NIH, Bethesda, MD 20892 USA
[2] Univ Arizona, Coll Social & Behav Sci, Dept Psychol, Tucson, AZ 85721 USA
关键词
D O I
10.1152/jn.2000.83.4.2453
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Texture segregation in the human visual cortex: a functional MRI study. J. Neurophysiol. 83: 2453-2457, 2000. The segregation of visual scenes based on contour information is a fundamental process of early vision. Contours can be defined by simple cues, such as luminance, as well as by more complex cues, such as texture. Single-cell recording studies in monkeys suggest that the neural processing of complex contours starts as early as primary visual cortex. Additionally, lesion studies in monkeys indicate an important contribution of higher order areas to these processes. Using functional MRI, we have investigated the level at which neural correlates of texture segregation can be found in the human visual cortex. Activity evoked by line textures, with and without texture-defined boundaries, was compared in five healthy subjects. Areas V1, V2/VP, V4, TEO, and V3A were activated by both kinds of line textures as compared with blank presentations. Textures with boundaries forming a checkerboard pattern, relative to uniform textures, evoked significantly more activity in areas V4, TEO, less reliably in V3A, but not in V1 or V2/VP. These results provide evidence that higher order areas with large receptive fields play an important role in the segregation of visual scenes based on texture-defined boundaries.
引用
收藏
页码:2453 / 2457
页数:5
相关论文
共 45 条
[1]   ELECTROPHYSIOLOGICAL CORRELATES OF TEXTURE SEGREGATION IN THE HUMAN VISUAL EVOKED-POTENTIAL [J].
BACH, M ;
MEIGEN, T .
VISION RESEARCH, 1992, 32 (03) :417-424
[2]   Cortical regions involved in visual texture perception: a fMRI study [J].
Beason-Held, LL ;
Purpura, KP ;
Krasuski, JS ;
Maisog, JM ;
Daly, EM ;
Mangot, DJ ;
Desmond, RE ;
Optican, LM ;
Schapiro, MB ;
VanMeter, JW .
COGNITIVE BRAIN RESEARCH, 1998, 7 (02) :111-118
[3]   VISION OUTSIDE THE FOCUS OF ATTENTION [J].
BRAUN, J ;
SAGI, D .
PERCEPTION & PSYCHOPHYSICS, 1990, 48 (01) :45-58
[4]   Topography of contextual modulations mediated by short-range interactions in primary visual cortex [J].
Das, A ;
Gilbert, CD .
NATURE, 1999, 399 (6737) :655-661
[5]  
De Weerd P., 1998, Society for Neuroscience Abstracts, V24, P1396
[6]   2 STAGES IN VISUAL TEXTURE SEGREGATION - A LESION STUDY IN THE CAT [J].
DEWEERD, P ;
SPRAGUE, JM ;
VANDENBUSSCHE, E ;
ORBAN, GA .
JOURNAL OF NEUROSCIENCE, 1994, 14 (03) :929-948
[7]  
DEWEERD P, 1993, EUR J NEUROSCI, V5, P1695
[8]   Cue-dependent deficits in grating orientation discrimination after V4 lesions in macaques [J].
DeWeerd, P ;
Desimone, R ;
Ungerleider, LG .
VISUAL NEUROSCIENCE, 1996, 13 (03) :529-538
[9]   Brain activity related to the perception of illusory contours [J].
Ffytche, DH ;
Zeki, S .
NEUROIMAGE, 1996, 3 (02) :104-108
[10]  
Friston K., 1995, HUMAN BRAIN MAPPING, V2, P189, DOI [DOI 10.1002/HBM.460020402, 10.1002/hbm.460020402]