The cerebral origin of the alpha rhythm.
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.
D000513:Alpha Rhythm; D000818:Animals; D001921:Brain / Q000378:metabolism / Q000502:physiology* / Q000503:physiopathology; D004285:Dogs; D002534:Hypoxia, Brain / Q000378:metabolism / Q000503:physiopathology; D066298:In Vitro Techniques; D010101:Oxygen Consumption