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Electrically Elicited Blink Reflex and Early Acoustic Evoked Potentials in Circumscribed and Diffuse Brain Stem Lesions

  • Norfrid Klug
  • György Csécsei
Part of the Acta Neurochirurgica book series (NEUROCHIRURGICA, volume 40)

Abstract

Modern radiological investigation techniques permit an increasingly precise imaging of the brain stem and adjacent structures. The imaging of individual structures and their reconstruction in various planes reveals the presence of space-occupying processes, haemorrhages, structural alterations, oedematous swelling and substance defects as density differences or zones of different signal intensity. However, just like conventional X-ray methods, computer tomography and nuclear magnetic resonance tomography does not reveal the extent of a functional disorder in the transverse and longitudinal section of the brain stem. Besides clinical investigation, additional electrophysiological measures are necessary for this purpose. With the aid of these methods, neurological deficits and clinically latent disorders can be collated with pathological alterations in the brain stem. Since the electroencephalogram in brain stem lesions merely shows nonspecific alterations, the registration of electrically elicited brain stem reflexes and evoked brain stem potentials have increasing significance, since their generators and connection pathways in the brain stem are known and circumscribed or diffuse functional disorders can be inferred from changes in these potentials. Their registration is simple, can be repeated as often as desired and is not a burden for the patient.

Keywords

Brain Stem Brain Death Inferior Colliculus Wave Versus Auditory Brain Stem Response 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Wien 1987

Authors and Affiliations

  • Norfrid Klug
    • 1
  • György Csécsei
    • 1
  1. 1.Department of NeurosurgeryUniversity of GiessenFederal Republic of Germany

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