Neurophysiology CNS

      A number of techniques are available to investigate the question of how and where in the brain particular perceptual and cognitive processes occur. Electroencephalography (EEG) and cerebral evoked potentials (EPs) including motor EPs with transcranial magnetic stimulation allow us to view activity or problems within the human brain, without invasive neurosurgery. Thus, “localization” or “specialization” of various functions in the cerebral cortices as well as the subcortical structures has been elucidated in normal subjects and patients with neurological disorders. These findings have greatly contributed to the understanding of the brain functions in human. Each non-invasive method has advantages and disadvantages so that the neurologists should choose the appropriate way to assess the brain function. EEG is extremely useful for the assessment of the epilepsy and consciousness disturbance by recording from electrodes placed on the scalp. EPs are capable of detecting changes in electrical activity in the brain on a millisecond-level: visual, auditory, somatosensory and motor systems are evaluated quantitatively. In this talk, I will focus on the above mentioned electrophysiological techniques and demonstrate their feasibility in clinical neurology.
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