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The cerebral origin of the alpha rhythm
1Department of Anesthesiology, University of Wisconsin-Madison 53792.
Electroencephalography and Clinical Neurophysiology
|January 1, 1988
Abstract:
The EEG alpha rhythm was recorded from 8 isolated canine brains in the absence of orbital contents, drug effect, or pulsatile cerebral blood flow. Abrupt shift to hypoxic perfusion, with maintenance of other perfusion variables, resulted in a loss of alpha coincident with a fall in CMRO2 and rise in oxygen deficit. It is concluded that the alpha rhythm reflects neural electrical activity, and that sources in the eye muscles or in cardiac-induced electromechanical properties of the brain may be rejected.