Functional near-infrared spectroscopy during optic flow with and without fixation
BACKGROUND AND PURPOSE: Individuals with visual vertigo describe symptoms of dizziness, disorientation, and/or impaired balance in environments with conflicting visual and vestibular information or complex visual stimuli. Physical therapists often prescribe habituation exercises using optic flow to...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5841770/ https://www.ncbi.nlm.nih.gov/pubmed/29513720 http://dx.doi.org/10.1371/journal.pone.0193710 |
_version_ | 1783304793623625728 |
---|---|
author | Hoppes, Carrie W. Sparto, Patrick J. Whitney, Susan L. Furman, Joseph M. Huppert, Theodore J. |
author_facet | Hoppes, Carrie W. Sparto, Patrick J. Whitney, Susan L. Furman, Joseph M. Huppert, Theodore J. |
author_sort | Hoppes, Carrie W. |
collection | PubMed |
description | BACKGROUND AND PURPOSE: Individuals with visual vertigo describe symptoms of dizziness, disorientation, and/or impaired balance in environments with conflicting visual and vestibular information or complex visual stimuli. Physical therapists often prescribe habituation exercises using optic flow to treat these symptoms, but there are no evidence-based guidelines for delivering optic flow and it is unclear how the brain processes such stimuli. The purposes of this study were to use functional near-infrared spectroscopy (fNIRS) to explore cerebral activation during optic flow, and determine if visual fixation had a modulating effect on brain activity. METHODS: Fifteen healthy participants (7 males and 8 females; mean age 41 years old) stood in a virtual reality environment and viewed optic flow moving unidirectionally in the yaw plane with and without fixation. Changes in cerebral activation were recorded from the bilateral fronto-temporo-parietal and occipital lobes using fNIRS. RESULTS: Cerebral activation was greater with visual motion than while viewing a stationary scene. Greater cerebral activation in the bilateral fronto-temporo-parietal lobes was observed when optic flow was viewed with fixation. DISCUSSION AND CONCLUSIONS: Optic flow activates the bilateral fronto-temporo-parietal regions of the cerebral cortex. This activation is greater while viewing optic flow and a fixation target, providing preliminary evidence supporting the use of a fixation target during habituation exercises. |
format | Online Article Text |
id | pubmed-5841770 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-58417702018-03-23 Functional near-infrared spectroscopy during optic flow with and without fixation Hoppes, Carrie W. Sparto, Patrick J. Whitney, Susan L. Furman, Joseph M. Huppert, Theodore J. PLoS One Research Article BACKGROUND AND PURPOSE: Individuals with visual vertigo describe symptoms of dizziness, disorientation, and/or impaired balance in environments with conflicting visual and vestibular information or complex visual stimuli. Physical therapists often prescribe habituation exercises using optic flow to treat these symptoms, but there are no evidence-based guidelines for delivering optic flow and it is unclear how the brain processes such stimuli. The purposes of this study were to use functional near-infrared spectroscopy (fNIRS) to explore cerebral activation during optic flow, and determine if visual fixation had a modulating effect on brain activity. METHODS: Fifteen healthy participants (7 males and 8 females; mean age 41 years old) stood in a virtual reality environment and viewed optic flow moving unidirectionally in the yaw plane with and without fixation. Changes in cerebral activation were recorded from the bilateral fronto-temporo-parietal and occipital lobes using fNIRS. RESULTS: Cerebral activation was greater with visual motion than while viewing a stationary scene. Greater cerebral activation in the bilateral fronto-temporo-parietal lobes was observed when optic flow was viewed with fixation. DISCUSSION AND CONCLUSIONS: Optic flow activates the bilateral fronto-temporo-parietal regions of the cerebral cortex. This activation is greater while viewing optic flow and a fixation target, providing preliminary evidence supporting the use of a fixation target during habituation exercises. Public Library of Science 2018-03-07 /pmc/articles/PMC5841770/ /pubmed/29513720 http://dx.doi.org/10.1371/journal.pone.0193710 Text en https://creativecommons.org/publicdomain/zero/1.0/ This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 (https://creativecommons.org/publicdomain/zero/1.0/) public domain dedication. |
spellingShingle | Research Article Hoppes, Carrie W. Sparto, Patrick J. Whitney, Susan L. Furman, Joseph M. Huppert, Theodore J. Functional near-infrared spectroscopy during optic flow with and without fixation |
title | Functional near-infrared spectroscopy during optic flow with and without fixation |
title_full | Functional near-infrared spectroscopy during optic flow with and without fixation |
title_fullStr | Functional near-infrared spectroscopy during optic flow with and without fixation |
title_full_unstemmed | Functional near-infrared spectroscopy during optic flow with and without fixation |
title_short | Functional near-infrared spectroscopy during optic flow with and without fixation |
title_sort | functional near-infrared spectroscopy during optic flow with and without fixation |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5841770/ https://www.ncbi.nlm.nih.gov/pubmed/29513720 http://dx.doi.org/10.1371/journal.pone.0193710 |
work_keys_str_mv | AT hoppescarriew functionalnearinfraredspectroscopyduringopticflowwithandwithoutfixation AT spartopatrickj functionalnearinfraredspectroscopyduringopticflowwithandwithoutfixation AT whitneysusanl functionalnearinfraredspectroscopyduringopticflowwithandwithoutfixation AT furmanjosephm functionalnearinfraredspectroscopyduringopticflowwithandwithoutfixation AT hupperttheodorej functionalnearinfraredspectroscopyduringopticflowwithandwithoutfixation |