نتایج جستجو برای: evoked magnetic fields
تعداد نتایج: 578127 فیلتر نتایج به سال:
Single-pulse transcranial magnetic stimulations (TMSs) of the motor cortex (M1) were performed in order to decipher the neural mechanisms of time preparation. We varied the degree to which it was possible to prepare for the response signal in a choice reaction time (RT) task by employing either a short (500 ms) or a long (2500 ms) foreperiod in separate blocks of trials. Transcranial magnetic s...
Although the electrical excitability of the cerebral cortex was discovered more than 100 years ago by Fritz and Hitzig and Ferrier, it has proved dif®cult until recently to perform effective stimulation without removing the scalp and skull. The reason is that both these structures have a high resistance to the passage of electrical current. Thus, if stimulating electrodes are placed over an are...
OBJECTIVE To investigate somesthetic functions of the perisylvian cortex. METHODS Somatosensory evoked magnetic fields (SEFs) and somatosensory evoked potentials (SEPs) of the perisylvian cortex were recorded directly from subdural electrodes in a patient with a left frontal brain tumour. RESULTS The most prominent SEP components after electrical stimulation of the right and left hands and ...
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