Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Guger, C; Domej, W; Lindner, G; Pfurtscheller, K; Pfurtscheller, G; Edlinger, G.
Effects of a fast cable car ascent to an altitude of 2700 meters on EEG and ECG.
Neurosci Lett. 2005; 377(1):53-58
Doi: 10.1016/j.neulet.2004.11.065
Web of Science
PubMed
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- Co-Autor*innen der Med Uni Graz
- Domej Wolfgang
- Pfurtscheller Klaus
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- Abstract:
- In the Eastern Alps, the Dachstein massif with a height of almost 3000 m is an ideal location for investigating the effects of changes in altitude on the human body. Within a few minutes, a cable car facilitates an ascent from 1702 to 2700 m above sea level, where the partial pressure of oxygen is about 550 mmHg (as compared to 760 mmHg at sea level). In this study, 10 healthy subjects performed a reaction time task at 990 m and 2700 m in altitude. The subjects were instructed to perform a right hand index finger movement as fast as possible after a green light flashed (repeated 50 times). The corresponding electrocardiogram (ECG) and the electroencephalogram (EEG) were recorded. From the ECG heart rate and heart rate variability measures in the time and frequency domain were calculated. An event-related desynchronization/synchronization (ERD/ERS) analysis was performed with the EEG data. Finally, the EEG activity and the ECG parameters were correlated. The study showed that with the fast ascent to 2700 m the heart rate increased and the heart rate variability measures decreased. The correlation analysis indicated a close relationship between the EEG activity and the heart rate and heart rate variability. Furthermore it was shown for the first time that the beta ERS in the 14-18 Hz frequency range (post-movement beta ERS) was significantly reduced at high altitude. Very interesting also is the loss of correlation between EEG activity and cardiovascular measures during finger movement at high altitude. The suppressed post-movement beta ERS at the altitude of 2700 m may be interpreted as results of an increased cortical excitability level when compared with the reference altitude at 990 m above sea level.
- Find related publications in this database (using NLM MeSH Indexing)
- Adult -
- Altitude -
- Electrocardiography - methods Electrocardiography - statistics and numerical data
- Electroencephalography - methods Electroencephalography - statistics and numerical data
- Female -
- Heart Rate - physiology
- Humans -
- Male -
- Middle Aged -
- Photic Stimulation - methods
- Psychomotor Performance - physiology
- Reaction Time - physiology
- Time Factors -
- Find related publications in this database (Keywords)
- high altitude
- cortical excitability
- event-related desynchronization (ERD)
- heart rate variability
- beta oscillations