Short-term hypobaric hypoxia enhances visual contrast sensitivity

K. Benedek, S. Kéri, Andor Grósz, Zsolt Tótka, Erika Tóth, G. Benedek

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The effect of hypoxia on early visual functions remains a controversial area of research. To explore this question, we measured static and dynamic visual contrast sensitivity in 14 healthy volunteers at a simulated altitude of 5500 m. In comparison with the baseline condition (mean arterial oxygen saturation: 98.4%), contrast sensitivity significantly increased after 5, 10 and 15 min of hypoxic exposure (saturation: 82.9%, 77.0%, 74.3%, respectively). After 10 min, this enhancement was markedly pronounced under dynamic conditions. Returning to the baseline altitude (saturation: 97.7%), contrast sensitivity recovered, mostly at the lower spatial frequencies. There was a significant negative relationship between arterial oxygen saturation and contrast sensitivity values at low and medium spatial frequencies (0.5-4.8 c/deg). These results suggest that early visual processing may be enhanced during short-term hypoxic challenge.

Original languageEnglish
Pages (from-to)1063-1066
Number of pages4
JournalNeuroReport
Volume13
Issue number8
Publication statusPublished - Jun 12 2002

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Contrast Sensitivity
Oxygen
Healthy Volunteers
Hypoxia
Research

Keywords

  • Hypoxia
  • Retina
  • Simulated altitude
  • Visual contrast sensitivity

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Short-term hypobaric hypoxia enhances visual contrast sensitivity. / Benedek, K.; Kéri, S.; Grósz, Andor; Tótka, Zsolt; Tóth, Erika; Benedek, G.

In: NeuroReport, Vol. 13, No. 8, 12.06.2002, p. 1063-1066.

Research output: Contribution to journalArticle

Benedek, K, Kéri, S, Grósz, A, Tótka, Z, Tóth, E & Benedek, G 2002, 'Short-term hypobaric hypoxia enhances visual contrast sensitivity', NeuroReport, vol. 13, no. 8, pp. 1063-1066.
Benedek, K. ; Kéri, S. ; Grósz, Andor ; Tótka, Zsolt ; Tóth, Erika ; Benedek, G. / Short-term hypobaric hypoxia enhances visual contrast sensitivity. In: NeuroReport. 2002 ; Vol. 13, No. 8. pp. 1063-1066.
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