Properties of the Spontaneous Fluctuations in Cortical Oxygen Pressure
In previous publications (Manil et al., 1978; 1981; Bourgain et al., 1980) the spontaneous fluctuations of the cortical tissue pressure in oxygen (Po2) in the awake rabbit were described in detail. The mean amplitude of these irregular oscillations was 5% of the normal local Po2 where 100% is defined as the value recorded in normal control conditions and 0% as the value recorded when death occurred after sustained pure nitrogen breathing. Analysis of the frequency domain demonstrates that in control conditions the power of the spectrum decreased from 0.06 to 0.5 Hz.
KeywordsSlow Wave Coherence Function Tissue Pressure Spontaneous Fluctuation Ciba Foundation Symposium
Unable to display preview. Download preview PDF.
- Bourgain, R.H., Colin, F., Vermarien, H., Maes, L., and Manil, J., 1981, Control mechanisms involved in the regulation of cerebral tissue pressure in oxygen, Adv. Physiol, Sci., 25: 207–213.Google Scholar
- Lübbers, D.W., and Leniger-Follert, E., 1978, Capillary flow in the brain cortex during changes in oxygen supply and state of activation, in: “Cerebral Vascular Smooth Muscle and its Control”, Ciba Foundation Symposium 56, Elsevier/Excerpta Medica/North Holland, Amsterdam, pp. 21–47.Google Scholar
- Manil, J., Bourgain, R., Colin, F., Maes, L., and Vermarien, H., 1981, The effect of α-blocking on the normal cortical cerebral tissue oxygen pressure and on the recovery from anoxic anoxia, Arch. Int. Physiol. Biochim., 89: P8.Google Scholar
- Silver, I.A., 1978, Cellular microenvironment in relation to local blood flow, in: “Cerebral Vascular Smooth Muscle and its Control”, Ciba Foundation Symposium 56, Elsevier/Excerpta Medica/North Holland, Amsterdam, pp. 49–61.Google Scholar