Download Amobarbital Effects and Lateralized Brain Function: The Wada by David W. Loring, Kimford J. Meador, Gregory P. Lee, Don W. PDF

By David W. Loring, Kimford J. Meador, Gregory P. Lee, Don W. King

The intracarotid amobarbital (or Amytal) technique is usually known as the Wada try out in tribute to Juhn Wada, the doctor who devised the method and played the 1st easy animal study and medical reviews with this system. Wada checking out has develop into a vital part of the pre­ operative overview for epilepsy surgical procedure. apparently, even if, Wada at the start constructed this technique as a method to evaluate language dominance in psychiatric sufferers so that electroconvulsant remedy can be utilized unilaterally to the non-dominant hemisphere. Epilepsy surgical procedure has matured as a plausible therapy for intractable seizures and is not any longer confmed to some significant universities and scientific institutes. but, as is more and more transparent by means of interpreting the surveys of techniques utilized by epilepsy surgical procedure facilities (e.g., Rausch, 1987; Snyder, Novelly, & Harris, 1990), there isn't merely nice heterogeneity within the tools used in the course of Wada trying out to evaluate language and reminiscence capabilities, yet there additionally appears to be like an absence of consensus in regards to the theoretical assumptions, and maybe, even the objectives of this procedure.

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Additional resources for Amobarbital Effects and Lateralized Brain Function: The Wada Test

Sample text

Our personal experiences suggest that cerebral dominance for language and verbal memory are not necessarily linked. , language impairment in right-handed individuals following injury to the right hemisphere), the effects of injury on visual-spatial processing have been unclear. For example, if crossed aphasia suggests a mirror cortical representation (situs inversus), then visual-spatial deficits associated with crossed aphasia should occur no more frequently than observed following left hemisphere damage and aphasia in the general population.

It may be presumed his amnesic state was ushered in by a psychomotor attack, but whether this was associated with a vascular lesion is not known" (p. 545). The second case was a 57-year-old female homemaker with seizures since age 46 who underwent resection of approximately 6 cm of the right temporal lobe. Following surgery, she displayed a pronounced recent memory defIcit. For example, she attempted to make a purchase at a store without money. After the accompanying nurse intervened, the patient repeated the same error at a different check-out counter.

Items are presented at certain times throughout the procedure. After medication effects have receded, memory is tested. Free-recall failure is commonly not considered memory failure, and evidence exists that recognition rather than recall is a more reliable measure of hemispheric memory (Christianson, Saisii & Silfvenius, 1990; Walker & Laxer, 1989). Snyder & Novelly (1991) reported that of the 55 epilepsy surgery centers surveyed, 19 (29%) employed a stimulus-distractor approach, whereas 39 centers (71%) employed discrete item presentation.

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