The Library
The Cortical Hyperexcitability Index (CHi) : a new measure for quantifying correlates of visually driven cortical hyperexcitability
Tools
Tools
Tools
Braithwaite, Jason J., Marchant, Rachel, Takahashi, Chie, Dewe, Hayley and Watson, Derrick G. (2015) The Cortical Hyperexcitability Index (CHi) : a new measure for quantifying correlates of visually driven cortical hyperexcitability. Cognitive Neuropsychiatry, 20 (4). doi:10.1080/13546805.2015.1040152
|
PDF
WRAP_9871443-ps-080415-the_cortical_hyperexcitability_index_chi_accepted_arp_2015.pdf - Accepted Version - Requires a PDF viewer. Download (775Kb) | Preview |
Official URL: http://doi.org/10.1080/13546805.2015.1040152
Abstract
Introduction:
Aberrations of visual experience, including visual hallucinations and visual distortions are known to be associated with increased cortical hyperexcitability. As a consequence, the presence, intensity and frequency of certain experiences may well be indicative of an
underlying increase in cortical hyperexcitability.
Method:
The current study presents a new proxy measure of cortical hyperexcitability, the Cortical Hyperexcitability Index (CHi). Two-hundred and fifty healthy participants completed the CHi with the results subjected to Exploratory Factor Analysis (EFA).
Results:
The EFA revealed a 3-factor model as the most parsimonious solution. The 3 factors were defined as; (i) heightened visual sensitivity and discomfort; (ii) negative aura-type visual aberrations; and, (iii) positive aura-type visual aberrations. The identification of 3-factors suggests that multiple mechanisms underlie the notion of cortical hyperexcitability, providing researchers with new and greater precision in delineating these underlying features.
Conclusion:
The factorial structure of the CHi, and the increased precision could aid the interpretation of findings from neuroscientific (i.e., brain-imaging / stimulation) examinations of cortical processes underlying aberrant perceptions across a host of clinical, neurological, and pathological conditions. As a consequence, the CHi is a useful and comprehensive proxy measure of cortical hyperexcitability with considerable scientific and clinical utility.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | B Philosophy. Psychology. Religion > BF Psychology | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Psychology | ||||||||
| Library of Congress Subject Headings (LCSH): | Hallucinations and illusions | ||||||||
| Journal or Publication Title: | Cognitive Neuropsychiatry | ||||||||
| Publisher: | Psychology Press | ||||||||
| ISSN: | 1354-6805 | ||||||||
| Official Date: | 28 May 2015 | ||||||||
| Dates: |
|
||||||||
| Volume: | 20 | ||||||||
| Number: | 4 | ||||||||
| DOI: | 10.1080/13546805.2015.1040152 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Funder: | Leverhulme Trust (LT) | ||||||||
| Grant number: | RPG-2012-500 (LT) | ||||||||
| Adapted As: |
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
Downloads
Downloads per month over past year
