Linked Life Data

8733747

Source:http://linkedlifedata.com/resource/pubmed/id/8733747

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1996-11-5
pubmed:abstractText
Although patients with blindsight are usually unable to discriminate forms, recent neuropsychological data have suggested that they could still use some form attributes in object-oriented actions. One patient with a complete right hemianopia due to a medial occipital lesion has been tested for his capacities to process orientation and size of visual objects. He was presented with either a slot of variable orientation or with rectangular objects of the same surface but variable length. His performance was studied in three types of tasks: motor, in which he had to insert a card in the slot or to grasp the rectangle between thumb and indexfinger; verbal, in which forced-choice verbal guesses were required; and matching, which required matching orientation or size with wrist or fingers. Although responses were at chance level in the two latter conditions, motor responses were systematically influenced by both orientation and size of the stimulus. These data provide further evidence for two dissociable modes of visual information processing dealing respectively with 'what"' the object is vs 'how' to grasp it. They also indicate that the neural pathway controlling visuomotor transformation in humans is much less dependent on V1 input than the pathway involved in visual discrimination and identification.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0959-4965
pubmed:author
pubmed:issnType
Print
pubmed:day
29
pubmed:volume
7
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
793-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Grasping without form discrimination in a hemianopic field.
pubmed:affiliation
Vision et Motricité, INSERM Unité 94, Bron, France.
pubmed:publicationType
Journal Article, Case Reports