title: A comparative study of plethysmographic waves derived from the head by impedance and photoelectric techniques.
mesh_terms: D000818:Animals; D002415:Cats; D002540:Cerebral Cortex / Q000502:physiology; D002560:Cerebrovascular Circulation; D004423:Ear; D004569:Electroencephalography; D004594:Electrophysiology; D000882:Haplorhini; D006801:Humans; D008027:Light; D008297:Male; D010992:Plethysmography, Impedance; D012212:Rheology