A high-intensity, goggle-mounted flash stimulator for short-latency visual evoked potentials.
The few studies that have been done on short-latency, subcortical visual evoked potentials (SVEPs) have all used stroboscopic flashes as the evoking stimulus. The dimensions of the stimulator, the acoustical artifacts and the photic spread to the examination room limited the use of SVEPs to research laboratories. With the advent of high-efficiency light-emitting diodes (LEDs), high-intensity flashes can now be generated from goggle-mounted LEDs. In this study, a goggle-mounted high-intensity stimulator was constructed and its flashes used to evoke SVEPs. The reproducibility of SVEPs across subjects and the ease of using the high-intensity LED flash stimulator make them a promising candidate for testing subcortical visual pathway function in the operating room.
Assessment of sensory function in the operating room utilizing cerebral evoked potentials: a study of fifty-six surgically anesthetized patients.
Sensory evoked potentials (visual, auditory, and somatosensory) were recorded from 56 patients at the time of surgery to monitor neural function during critical portions of the operation. Fluctuations in latency and amplitude of the components occurred with changes in depth of anesthesia, blood pressure, irrigation, and neural tissue manipulation. Most of these changes were only transient. Permanent changes in evoked potentials occurred with decompression of neural tissue and prolonged retraction. Transient changes were not associated with any change in postoperative neurological function whereas changes in evoked potentials that persisted through the operation were highly likely to be associated with a postoperative change.
Britain, the Commonwealth and Europe : the Commonwealth and Britain's applications to join the European Communities
Preface Notes on the Contributors Britain, The Commonwealth and Europe: An Overview D.Maitland 'The Jolly Old Empire': Labour, the Commonwealth and Europe, 1945-51 D.Russell Britain, the Commonwealth and Europe in the 1950s W.Nicoll The Australian Department of Trade and the EEC, 1956-61 J.O'Brien The Commonwealth in British European Policy: Politics and Sentiment, 1956-63 G.Wilkes 'Commonwealth or Europe?': Macmillan's Dilemma, 1961-63 A.May Commonwealth International Financial Arrangements and Britain's First Application to Join the EEC M.Kandiah & G.Staerck The Labour Government, Commonwealth Policy, and the Second Application to Join the EEC, 1964-67 P.R.Alexander The EEC and the Erosion of the Old Commonwealth Relationship S.Ward Index