Effect of unilateral forced nostril breathing on tonic accommodation and intraocular pressure

Chen, Jennifer C., Brown, Brian, & Schmid, Katrina L. (2004) Effect of unilateral forced nostril breathing on tonic accommodation and intraocular pressure. Clinical Autonomic Research: Official Journal Of The Clinical Autonomic Research Society, 14(6), pp. 396-400.

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BACKGROUND : Unilateral forced nostril breathing (UFNB) has specific measurable effects on the autonomic nervous system. Ocular accommodation, which is controlled by the autonomic nervous system, would be expected to be under the influence of UFNB when it is applied. The purpose of this study was to investigate the effect of UFNB on the resting state of the accommodation system, i. e. tonic accommodation (TA), along with measures of intraocular pressure (IOP), blood pressure and heart rate. METHODS : TA levels were measured using the Shin-Nippon autorefractor before and after 20 minutes of UFNB. IOP, blood pressure and heart rate, which are known to be affected by UFNB, were also measured with a non-contact tonometer and an automated blood pressure monitor respectively. RESULTS : Right and left UFNB produced slight, but not significant changes in TA. However, there was a tendency for left UFNB to produce a greater decrease in TA in subjects with higher base-line TA levels. Right UFNB produced a statistically significant decrease in IOP while the effect of left UFNB on IOP was not significant. CONCLUSION : UFNB produced changes in IOP consistent with previous reports. As studied in this trial, UFNB did not have any significant effect on TA. Further studies using a larger sample size are required to investigate the effect of UFNB on the autonomic inputs to the ciliary muscle of the eye and the subsequent measures of tonic accommodation.

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ID Code: 4271
Item Type: Journal Article
Refereed: Yes
Additional Information: For more information, please refer to the journal's website (see link) or contact the author. Author contact details: jc.chen@qut.edu.au
Keywords: Intraocular Pressure/, physiology, Nose/, physiology, Respiratory Mechanics/, physiology, Accommodation, Ocular/physiology, Adolescent, Adult, Autonomic Nervous System/physiology, Blood Pressure/physiology, Female, Heart Rate/physiology, Humans, Male, Research Support, Non, U, S, Gov't
DOI: 10.1007/s10286-004-0200-4
ISSN: 1619-1560
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2004 Springer
Copyright Statement: The original publication is available at SpringerLink
Deposited On: 14 Jun 2006 00:00
Last Modified: 29 Feb 2012 13:09

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