Inhibitory tagging of locations in the blind field of hemianopic patients

被引:58
作者
Danziger, S
Fendrich, R
Rafal, RD
机构
[1] VET ADM MED CTR,MARTINEZ,CA 94553
[2] DARTMOUTH COLL,HANOVER,NH 03755
基金
美国国家卫生研究院;
关键词
D O I
10.1006/ccog.1997.0312
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
This study evaluated the potential contribution of extrageniculate visual pathways to oculomotor orienting reflexes in hemianopic patients. It tested whether extrageniculate pathways mediate inhibition of return (IOR)-a phenomenon characterized by slowed target detections at recently stimulated locations (Posner & Cohen, 1984). Because hemianopic subjects cannot overtly respond to stimuli presented within their hemianopic field, we utilized a spatial cueing paradigm that capitalized on the fact that IOR operates in spatiotopic coordinates. Subjects moved their eyes so that a cue and a target presented at the same spatial location were imaged successively onto blind and seeing portions of their retinas. One hemianopic patient showed a similar IOR effect from cues presented within both the seeing and the hemianopic fields. With a second hemianopic patient, only presentations of the cue to the subject's seeing field produced IOR. The explanation for this discrepancy is not evident. These observations highlight both the potential value and the pitfalls inherent in using ''blindsight'' as a window into human consciousness. (C) 1997 Academic Press.
引用
收藏
页码:291 / 307
页数:17
相关论文
共 20 条
  • [1] HUMAN VISUAL RESPONSES IN THE ABSENCE OF THE GENICULO-CALCARINE PROJECTION
    BARBUR, JL
    RUDDOCK, KH
    WATERFIELD, VA
    [J]. BRAIN, 1980, 103 (DEC) : 905 - 928
  • [2] RESIDUAL VISION IN A SCOTOMA - IMPLICATIONS FOR BLINDSIGHT
    FENDRICH, R
    WESSINGER, CM
    GAZZANIGA, MS
    [J]. SCIENCE, 1992, 258 (5087) : 1489 - 1491
  • [3] MOVEMENT SELECTION IN ADVANCE OF ACTION IN THE SUPERIOR COLLICULUS
    GLIMCHER, PW
    SPARKS, DL
    [J]. NATURE, 1992, 355 (6360) : 542 - 545
  • [4] JOHNSON MH, IN PRESS COGNITIVE N
  • [5] MARCEL A, 1980, COGNITIVE PSYCHOL, V15, P197
  • [6] SACCADES ARE SPATIALLY, NOT RETINOCENTRICALLY, CODED
    MAYS, LE
    SPARKS, DL
    [J]. SCIENCE, 1980, 208 (4448) : 1163 - 1165
  • [7] 2 VISUAL CORTICOTECTAL SYSTEMS IN CAT
    OGASAWARA, K
    MCHAFFIE, JG
    STEIN, BE
    [J]. JOURNAL OF NEUROPHYSIOLOGY, 1984, 52 (06) : 1226 - 1245
  • [8] RETINAL GANGLION-CELLS THAT PROJECT TO THE SUPERIOR COLLICULUS AND PRETECTUM IN THE MACAQUE MONKEY
    PERRY, VH
    COWEY, A
    [J]. NEUROSCIENCE, 1984, 12 (04) : 1125 - 1137
  • [9] Posner M. I., 1980, TUTORIALS MOTOR BEHA, P243
  • [10] INHIBITION OF RETURN - NEURAL BASIS AND FUNCTION
    POSNER, MI
    RAFAL, RD
    CHOATE, LS
    VAUGHAN, J
    [J]. COGNITIVE NEUROPSYCHOLOGY, 1985, 2 (03) : 211 - 228