A NEUROLOGICAL DISSOCIATION BETWEEN PERCEIVING OBJECTS AND GRASPING THEM

M A GOODALE, A D MILNER, L S JAKOBSON, David Peter Matthew Carey

Research output: Contribution to journalArticle

864 Citations (Scopus)

Abstract

Studies of the visual capacity of neurological patients have provided evidence for a dissociation between the perceptual report of a visual stimulus and the ability to direct spatially accurate movements toward that stimulus. Some patients with damage to the parietal lobe, for example, are unable to reach accurately towards visual targets that they unequivocally report seeing 1,2. Conversely, some patients with extensive damage to primary visual cortex can make accurate pointing movements or saccades toward a stimulus presented in their 'blind' scotoma 3-5. But in investigations of visuomotor control in patients with visual disorders, little consideration has ben given to complex acts such as manual prehension. Grasping a three-dimensional object requires knowledge not only of the object's spatial location, but also of its form, orientation and size. We have examined a patient with a profound disorder in the perception of such object qualities. Our quantitative analyses demonstrate strikingly accurate guidance of hand and finger movements directed at the very objects whose qualities she fails to perceive. These data suggest that the neural substrates for the visual perception of object qualities such as shape, orientation and size are distinct from those underlying the use of those qualities in the control of manual skills.

Original languageEnglish
Pages (from-to)154-156
Number of pages3
JournalNature
Volume349
Issue number6305
Publication statusPublished - 10 Jan 1991

Cite this

GOODALE, M. A., MILNER, A. D., JAKOBSON, L. S., & Carey, D. P. M. (1991). A NEUROLOGICAL DISSOCIATION BETWEEN PERCEIVING OBJECTS AND GRASPING THEM. Nature, 349(6305), 154-156.

A NEUROLOGICAL DISSOCIATION BETWEEN PERCEIVING OBJECTS AND GRASPING THEM. / GOODALE, M A ; MILNER, A D ; JAKOBSON, L S ; Carey, David Peter Matthew.

In: Nature, Vol. 349, No. 6305, 10.01.1991, p. 154-156.

Research output: Contribution to journalArticle

GOODALE, MA, MILNER, AD, JAKOBSON, LS & Carey, DPM 1991, 'A NEUROLOGICAL DISSOCIATION BETWEEN PERCEIVING OBJECTS AND GRASPING THEM', Nature, vol. 349, no. 6305, pp. 154-156.
GOODALE MA, MILNER AD, JAKOBSON LS, Carey DPM. A NEUROLOGICAL DISSOCIATION BETWEEN PERCEIVING OBJECTS AND GRASPING THEM. Nature. 1991 Jan 10;349(6305):154-156.
GOODALE, M A ; MILNER, A D ; JAKOBSON, L S ; Carey, David Peter Matthew. / A NEUROLOGICAL DISSOCIATION BETWEEN PERCEIVING OBJECTS AND GRASPING THEM. In: Nature. 1991 ; Vol. 349, No. 6305. pp. 154-156.
@article{9d9b1dfbd4a24fed96bb4c185b068bc6,
title = "A NEUROLOGICAL DISSOCIATION BETWEEN PERCEIVING OBJECTS AND GRASPING THEM",
abstract = "Studies of the visual capacity of neurological patients have provided evidence for a dissociation between the perceptual report of a visual stimulus and the ability to direct spatially accurate movements toward that stimulus. Some patients with damage to the parietal lobe, for example, are unable to reach accurately towards visual targets that they unequivocally report seeing 1,2. Conversely, some patients with extensive damage to primary visual cortex can make accurate pointing movements or saccades toward a stimulus presented in their 'blind' scotoma 3-5. But in investigations of visuomotor control in patients with visual disorders, little consideration has ben given to complex acts such as manual prehension. Grasping a three-dimensional object requires knowledge not only of the object's spatial location, but also of its form, orientation and size. We have examined a patient with a profound disorder in the perception of such object qualities. Our quantitative analyses demonstrate strikingly accurate guidance of hand and finger movements directed at the very objects whose qualities she fails to perceive. These data suggest that the neural substrates for the visual perception of object qualities such as shape, orientation and size are distinct from those underlying the use of those qualities in the control of manual skills.",
author = "GOODALE, {M A} and MILNER, {A D} and JAKOBSON, {L S} and Carey, {David Peter Matthew}",
year = "1991",
month = "1",
day = "10",
language = "English",
volume = "349",
pages = "154--156",
journal = "Nature",
issn = "0028-0836",
publisher = "Nature Publishing Group",
number = "6305",

}

TY - JOUR

T1 - A NEUROLOGICAL DISSOCIATION BETWEEN PERCEIVING OBJECTS AND GRASPING THEM

AU - GOODALE, M A

AU - MILNER, A D

AU - JAKOBSON, L S

AU - Carey, David Peter Matthew

PY - 1991/1/10

Y1 - 1991/1/10

N2 - Studies of the visual capacity of neurological patients have provided evidence for a dissociation between the perceptual report of a visual stimulus and the ability to direct spatially accurate movements toward that stimulus. Some patients with damage to the parietal lobe, for example, are unable to reach accurately towards visual targets that they unequivocally report seeing 1,2. Conversely, some patients with extensive damage to primary visual cortex can make accurate pointing movements or saccades toward a stimulus presented in their 'blind' scotoma 3-5. But in investigations of visuomotor control in patients with visual disorders, little consideration has ben given to complex acts such as manual prehension. Grasping a three-dimensional object requires knowledge not only of the object's spatial location, but also of its form, orientation and size. We have examined a patient with a profound disorder in the perception of such object qualities. Our quantitative analyses demonstrate strikingly accurate guidance of hand and finger movements directed at the very objects whose qualities she fails to perceive. These data suggest that the neural substrates for the visual perception of object qualities such as shape, orientation and size are distinct from those underlying the use of those qualities in the control of manual skills.

AB - Studies of the visual capacity of neurological patients have provided evidence for a dissociation between the perceptual report of a visual stimulus and the ability to direct spatially accurate movements toward that stimulus. Some patients with damage to the parietal lobe, for example, are unable to reach accurately towards visual targets that they unequivocally report seeing 1,2. Conversely, some patients with extensive damage to primary visual cortex can make accurate pointing movements or saccades toward a stimulus presented in their 'blind' scotoma 3-5. But in investigations of visuomotor control in patients with visual disorders, little consideration has ben given to complex acts such as manual prehension. Grasping a three-dimensional object requires knowledge not only of the object's spatial location, but also of its form, orientation and size. We have examined a patient with a profound disorder in the perception of such object qualities. Our quantitative analyses demonstrate strikingly accurate guidance of hand and finger movements directed at the very objects whose qualities she fails to perceive. These data suggest that the neural substrates for the visual perception of object qualities such as shape, orientation and size are distinct from those underlying the use of those qualities in the control of manual skills.

M3 - Article

VL - 349

SP - 154

EP - 156

JO - Nature

JF - Nature

SN - 0028-0836

IS - 6305

ER -