| The effect of physical effort on retinal activity in the human eye: rod and cone flicker electroretinogram studies. | |
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MedLine Citation:
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PMID: 20135138 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: The aim of our study was to assess the effect of physical exercise with increasing intensity on neuroretinal activity in healthy subjects (n = 30). METHOD: We analysed the amplitude and implicit time of b-wave electroretinogram (ERG) responses in two experiments: (1) for a scotopic blue 10 Hz flicker stimulus (rod-mediated responses), and (2) for a photopic white 30 Hz flicker stimulus (cone-mediated responses). Using a cycloergometer, three 10-minute effort-tests with increasing intensity were performed. Each participant was assigned individual workload values (W) below the lactate threshold (40% VO(2)max), at the lactate threshold (60-65% VO(2)max) and above the lactate threshold (80% VO(2)max). Five ERG recordings were taken: (1) before, (2-4) immediately after the three subsequent efforts and (5) 1 hour after the completion of the last effort. The right eye was selected for monocular stimulation in both experiments. RESULTS: After the first effort (40% VO(2)max), we observed an increased amplitude (p < 0.001) and decreased implicit time of the b-wave (p < 0.01) in cone-mediated responses, and no significant effects in rod-mediated responses. Despite the increase in effort intensity, the cone b-wave amplitude remained unchanged, whereas the rod b-wave amplitude significantly decreased after the subsequent efforts (p < 0.001). CONCLUSIONS: Rod-mediated responses were more susceptible to effort-induced homeostasis disruptions than the cone-mediated responses. The application of ERGs may be used as neurophysiological criteria in defining the cardiovascular status of the physical performance. |
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Authors:
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Teresa Zwierko; Damian Czepita; Wojciech Lubi?ski |
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Publication Detail:
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Type: Journal Article Date: 2010-02-05 |
Journal Detail:
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Title: Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv f?r klinische und experimentelle Ophthalmologie Volume: 248 ISSN: 1435-702X ISO Abbreviation: Graefes Arch. Clin. Exp. Ophthalmol. Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-03-29 Completed Date: 2010-06-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8205248 Medline TA: Graefes Arch Clin Exp Ophthalmol Country: Germany |
Other Details:
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Languages: eng Pagination: 659-66 Citation Subset: IM |
Affiliation:
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Department of Natural Sciences, University of Szczecin, Al. Piast?w 40 b blok 6, 71-065 Szczecin, Poland. teresa.zwierko@univ.szczecin.pl |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Body Constitution Electroretinography* Exercise / physiology* Hemodynamics Humans Lactic Acid / metabolism Male Photoreceptor Cells, Vertebrate / physiology* Retina / physiology Young Adult |
| Chemical | |
Reg. No./Substance:
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50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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