Effects of Unseen Stimuli on Reaction Times to Seen Stimuli in Monkeys with Blindsight

Authors: Cowey A.1; Stoerig P.2; Le Mare C.1

Source: Consciousness and Cognition, Volume 7, Number 3, September 1998 , pp. 312-323(12)

Publisher: Academic Press

Key:
Free Content - Free Content
New Content - New Content
Subscribed Content - Subscribed Content
Free Trial Content - Free Trial Content

Abstract:

In three macaque monkeys with unilateral removal of primary visual cortex and in one unoperated monkey, we measured reaction times to a visual target that was presented at a lateral eccentricity of 20° in the normal, left, visual hemifield. When an additional stimulus was presented at the corresponding position in the right hemifield (hemianopic in three of the monkeys), it significantly slowed the reaction time to the left target if it preceded it by delays from 100–500 msec. The most effective delay depended on the particular experimental paradigm and perhaps on the experience of the monkey with the task. The results show that reaction times to seen targets in the normal hemifield of monkeys are influenced by the presentation of “unseen” targets in the anopic hemifield, as in some patients with cortically blind visual field defects. Copyright 1998 Academic Press.

Language: English

Document Type: Research article

Affiliations: 1: University of Oxford, Department of Experimental Psychology, South Parks Road, Oxford, OX1 3UD, UK 2: Heinrich-Heine-Universität, Inst. Physiol. Psychology, Universitätsstr 1, Bldg 23.03, Düsseldorf, 40225, Germany

The full text electronic article is available for purchase. You will be able to download the full text electronic article after payment.

$54.13 plus tax      Refund Policy

 

OR

Back to top

Key:
Free Content - Free Content
New Content - New Content
Subscribed Content - Subscribed Content
Free Trial Content - Free Trial Content
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages.
Page Help Click here for Page Help
Shopping cart
Tools
Sign in






Need to register?
Sign up here
Text size: A | A | A | A