Microstimulation of V1 affects the detection of visual targets: manipulation of target contrast.

Microstimulation of V1 affects the detection of visual targets: manipulation of target contrast. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Microstimulation of V1 affects the detection of visual targets: manipulation of target contrast. Abstract Text:

Edward J Tehovnik,Warren M Slocum,

Electrical microstimulation of the striate cortex (area V1) in monkeys delays the execution of saccadic eye movements generated to a visual target located in the receptive field of the stimulated neurons. We have argued that this effect is because of disruption of the visual signal transmitted along the geniculostriate pathway. The delivery of electrical stimulation to V1 evokes a punctate light or dark phosphene in human subjects. If electrical stimulation of V1 in monkeys evokes a light or dark phosphene, then one might expect that the delay effect might vary according to whether monkeys are required to detect a light or a dark visual target. For instance, if the stimulation is activating V1 elements coding for a light visual stimulus but not a dark visual stimulus then stimulation may delay saccades generated to a light target but not to a dark target. We tested this idea by having monkeys generate saccadic eye movements to light or dark visual targets immediately after the stimulation was delivered to V1. We found that the delay effect induced by stimulation varied with target contrast, but remained invariant to whether a bright or dark visual target was presented in the receptive field of the stimulated neurons. The significance of these results is discussed with regard to using monkeys to develop a visual prosthesis for the blind.

Microstimulation of V1 affects the detection of visual targets: manipulation of target contrast. Publishing Authors By Initials

EJ Tehovnik,WM Slocum,

For similar psychological phenomena and processes: mental processes: perception: visual perception research abstracts see: psychological phenomena and processes: mental processes: perception: visual perception research

PUBMED ID PMID:

MEDLINE DATE:

Microstimulation of V1 affects the detection of visual targets: manipulation of target contrast. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Experimental brain research. Experimentelle Hirnfo

VOLUME: 165

Page Numbers: 305-14

Journal Abbreviation:

ISSN: 0014-4819

DAY: 8

MONTH: 06

YEAR: 2005

Microstimulation of V1 affects the detection of visual targets: manipulation of target contrast. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 43312

Microstimulation of V1 affects the detection of visual targets: manipulation of target contrast. Keywords Mesh Terms:

KEYWORDS: Visual Perception

MESH TERMS: physiology

Chemical & Substance for Abstract: Microstimulation of V1 affects the detection of visual targets: manipulation of target contrast. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Microstimulation of V1 affects the detection of visual targets: manipulation of target contrast.

AFFILIATION: Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, E25-634, Cambridge, MA 02139, USA. tehovnik@mit.edu

Country: Germany

AGENCY: United States NEI

GRANT: EY014884

ACRONYM: EY

MEDLINETA: Exp Brain Res

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Microstimulation of V1 affects the detection of visual targets: manipulation of target contrast Related Publications

• 5-Hydroxytryptamine (5HT)-induced valvulopathy: Compositional valvular alterations are associated with 5HT2B receptor and 5HT transporter transcript changes in Sprague-Dawley rats.
• Delaying forelimb responses by microstimulation of macaque V1.
• Experimental limit on optical-photon coupling to light neutral scalar bosons.
• Expression and functional analysis of aspartate transcarbamoylase and role of de novo pyrimidine synthesis in regulation of growth and development in Arabidopsis.
• Microstimulation of V1 affects the detection of visual targets: manipulation of target contrast.
• Microstimulation of macaque V1 disrupts target selection: effects of stimulation polarity.
• Muellerian duct cysts.
• Permittivity measurements using adjustable microscale electrode gaps between millimeter-sized spherical electrodes.
• Phosphene induction by microstimulation of macaque V1.
• Preconception planning: are we making progress?
• Statement on Chemical Additives. Committee on Chemicals Introduced in Foods: Food and Nutrition Section.
• THE SUPPORT OF VENTILATION.
• What delay fields tell us about striate cortex.