Improvement in arousal, visual neglect, and perception of stimulus intensity following cold pressor stimulation.
Summary of "Improvement in arousal, visual neglect, and perception of stimulus intensity following cold pressor stimulation."
The relationship between arousal, perception, and visual neglect was examined in this case study. Cold pressor stimulation (
CPS:
immersing the foot in iced water) was used to manipulate arousal and to determine its effects on contralesional neglect, perception of stimulus intensity (magnitude estimation), reaction time, and an electrophysiological correlate of ascending reticular activating system activity (i.e., the P50 potential). Measures that normalized from baseline following CPS included contralesional neglect on a clock drawing test, perception of stimulus magnitude, and P50 amplitude. The P50 amplitude returned to its abnormally low baseline level 20 min after CPS ended, indicating that CPS increased arousal.
Affiliation
a Department of Neurology , University of Pennsylvania , Philadelphia , PA , USA.
Journal Details
This article was published in the following journal.
Name: Neurocase
ISSN: 1465-3656
Pages:
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22013983
- DOI: http://dx.doi.org/10.1080/13554794.2011.568498
Medical and Biotech [MESH] Definitions
Psychophysics
The science dealing with the correlation of the physical characteristics of a stimulus, e.g., frequency or intensity, with the response to the stimulus, in order to assess the psychologic factors involved in the relationship.
Visual Perception
The selecting and organizing of visual stimuli based on the individual's past experience.
Amblyopia
A nonspecific term referring to impaired vision. Major subcategories include stimulus deprivation-induced amblyopia and toxic amblyopia. Stimulus deprivation-induced amblyopia is a developmental disorder of the visual cortex. A discrepancy between visual information received by the visual cortex from each eye results in abnormal cortical development. STRABISMUS and REFRACTIVE ERRORS may cause this condition. Toxic amblyopia is a disorder of the OPTIC NERVE which is associated with ALCOHOLISM, tobacco SMOKING, and other toxins and as an adverse effect of the use of some medications.
Vision Disparity
The difference between two images on the retina when looking at a visual stimulus. This occurs since the two retinas do not have the same view of the stimulus because of the location of our eyes. Thus the left eye does not get exactly the same view as the right eye.
Dominance, Ocular
The functional superiority and preferential use of one eye over the other. The term is usually applied to superiority in sighting (VISUAL PERCEPTION) or motor task but not difference in VISUAL ACUITY or dysfunction of one of the eyes. Ocular dominance can be modified by visual input and NEUROTROPHIC FACTORS.
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