| Brain slow potential and ERP changes associated with operator load in a visual tracking task. | |
| | |
MedLine Citation:
|
PMID: 2451593 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Brain electrophysiological changes occurring during the course of a visual tracking task were recorded from 24 normal subjects under varying conditions of workload. Recordings were made with directly coupled amplifiers from 4 scalp midline locations and of vertical and horizontal EOG. The task was to track with a joystick a moving letter on a video monitor screen. Various decisions and button pressing responses were required from the subject during the course of each tracking trial, the total duration of a trial being 28 sec. Trial difficulty was varied by requiring identification of 'targets' or 'non-targets' based on a pre-learned 1-, 3- or 6-letter set of possible targets, by varying speed and distance travelled by the letter and by the introduction of movement perturbation. Sustained negative slow potential (SP) shifts were associated with the introduction and course of each trial. These had 2 phases: an early phase related to memorization and rehearsal and a later stage associated with the tracking itself. Increasing tracking difficulty resulted in an increased negative DC shift during the tracking stage. Increased memory set size caused a reduction in the negative shift during the preparatory, memorization phase. The experimental manipulations of difficulty also resulted in a number of changes in the amplitude and/or latency of ERP components associated with the various points of decision or response. |
| | |
Authors:
|
W C McCallum; R Cooper; P V Pocock |
Related Documents
:
|
22982173 - Sildenafil provides sustained neuroprotection in the absence of learning recovery follo... 17484433 - Intelligence and cognitive flexibility: fluid intelligence correlates with feature "unb... 11499993 - Are hemispheric strategy differences independent of the level of performance? |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Electroencephalography and clinical neurophysiology Volume: 69 ISSN: 0013-4694 ISO Abbreviation: Electroencephalogr Clin Neurophysiol Publication Date: 1988 May |
Date Detail:
|
Created Date: 1988-05-26 Completed Date: 1988-05-26 Revised Date: 2008-11-21 |
Medline Journal Info:
|
Nlm Unique ID: 0375035 Medline TA: Electroencephalogr Clin Neurophysiol Country: IRELAND |
Other Details:
|
Languages: eng Pagination: 453-68 Citation Subset: IM; S |
Affiliation:
|
Burden Neurological Institute, Stapleton, Bristol, U.K. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Brain / physiology* Electrooculography* Evoked Potentials* Female Humans Male Middle Aged Psychomotor Performance* Reaction Time Vision, Ocular / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Compensatory reactions in forward fall: are they initiated by stretch receptors?
Next Document: Changes in pyramidal tract conduction with experimental brain-stem ischaemia in the monkey.