THE-INFLUENCE-OF-ELECTROANAESTHESIA-ON-THE-VISUAL-PATHWAYS

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THE-INFLUENCE-OF-ELECTROANAESTHESIA-ON-THE-VISUAL-PATHWAYS

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Abstracts of the Conference on Effects of Diffuse Electrical Curr-,nts on Physiological Mechanisms with Application to Electroanesthesia and Electrosleep, Vol 4, ~ (Milwaukee, ll"isconsin) 1q,7 The influence of electroonesthesio on the visual pothwo.ys Edward J Zuperku Anthony Sances, Jr Sanford J Larson Arthur S Wilson Marquette University; Wood \I A Hospital, Milwaukee Unresponsiveness to mechanical and electrical stimulation was produced by 70 Hz, ms duration, rectangular currents biased 2.5 ma above zero level Sinusoidal currents at various frequencies were al so used For these studies the currents were applied between nasion and inion of squirrel monkeys Jm taposed, bipolar electrodes were clmmically implanted in the optic tract, lateral geniculate nucleus (LGN), optic radiation, and calcarine fissure area of 18 animals Averaged evoked responses elicited by photic and electrical tract stimulation were retrieved during current application Responses in optic tract, LGN, and optic radiation decreased grndually with increased rectangular current levels Minimal change in evoked response occurre

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