...K. Yamashiro; R.R. Tasker; K. Iwayama; K. Mori; D. Albe-Fessard; J.O. Dostrovsky; J.W. Chodakiewitz During stereotactic surgery, intrathalamic single unit recordings and summated evoked potentials (Th-SEP), evoked by percutaneous electrical median nerve stimulation and intrathalamic...

...Sumio Uematsu; Vernon Tolo Experience with electrophysiological monitoring during surgery of the spinal vertebrae and spinal cord is reviewed. The cerebral somatosensory evoked potential (CSEP) is used to monitor spinal cord conductivity during mechanical manipulation of the vertebrae, most...

... activity. Evoked potentials in the central gray matter show much smaller amplitudes compared with somatosensory cortical evoked potentials (SSEP). The strongest component is a negative wave after 70–100 msec. Longer conditioning stimulation of the lemniscal system inhibits late components in the median...

...(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements. Trigeminal nerve Facial nerve Cranial nerve reflexes Brain stem reflexes Evoked potentials Acoustic neurinoma Proc...

...P.L. Gildenberg; K.S.K. Murthy 2 patients with previously implanted dorsal column stimulators underwent basal thalamotomy for the treatment of pain, which provided the opportunity to record evoked potentials from the intralaminar (IL) and ventroposterolateral (VPL) areas of the thalamus. Short...

...S. Tóth; J. Vajda; A. Sólyom The authors investigated the cerebellar function of patients with chronic implanted electrodes. The investigations were carried out using elicited compulsion events – evoked potentials and motor reactions – in different functional motor states, i.e., rest...

...) Effect of Dorsal Column Stimulation on Pain-Induced Intracerebral Impulse Patterns L.-E. Augustinsson, C.-A. Carlsson and P. Leissner Departments of Neurosurgery and Neurophysiology, University of Göteborg, Göteborg Key Words. Intractable pain Dorsal column stimulation Evoked potentials...

...P.M. Rossini; D. Gambi; L. Marchionno; P. David; D. Sollazzo 55 controls were studied to investigate the morphology of brain stem-evoked potential, utilizing variable electrode arrays. In a first series the active electrodes placed at C z and subocciput (SO) were referred to the linked earlobes...

... surfaces of the chimpanzee cerebellum. The current required for 90% reduction in the amplitude of the evoked potential was inversely proportional to the number of electrodes upon the cerebellar surface. A study of various waveforms showed that a 100 Hz, 0.25 msec pulse duration is near optimal...

.... Cerebellar stimulation Evoked potentials Spasticity Involuntary movements Dystonia Cerebral palsy Multiple sclerosis Appl. Neurophysiol. 40: 160-174 (1977/78) Physiological and Histological Effects of Cerebellar Stimulation Sanford J. L arson, A n th o n y Sances, jr., D avid C. H em m y, E d w ard...

... blood flow to the skin and muscle. It is hypothesized that the effect is due to sympathetic inactivation secondary to the application of electrical currents. Spinal cord stimulation Microspheres Evoked potentials Sympathetic nervous system Monkey Peripheral vascular disease Regional blood flow...

...Andrea Landi; Federico Colombo Near field brain stem evoked potentials (NF-BAEPs) were recorded by means of an intraparenchymatous electrode placed in the right mesencephalon, during a stereotactic-guided biopsy of a tumor. The traces were compared with far field BAEPs (FF-BAEPs) obtained...

...D. Jeanmonod; M. Sindou; F. Mauguière Spinal cord surface evoked potentials were studied during surgery in 20 patients operated upon for pain and spasticity using microsurgical DREZ-tomy (MDT). The goal was to collect data on spinal cord physiology and analyze the effects of MDT. Thanks...

...Gary P. Jacobson; Craig W. Newman; Robert E. Steg The effects of aging on the amplitude of the surface-recorded tibial nerve spinal somatosensory-evoked potential P21 component (L5-T12 electrode derivation) were studied in 79 subjects. The results of this investigation indicate that a significant...

...Marcos Velasco; Francisco Velasco; Ana Luisa Velasco Potential generators for surface brain stem (ABSP), P200 and P300 auditory evoked potentials have been localized in patients with implanted electrodes used as an electrophysiological procedure for surgical treatment. Results suggest that surface...

...Thad Makachinas; Janice Ovelmen-Levitt; Blaine S. Nashold Jr. The localization of neural pathology by the evoked potential technique through the use of the Nicolet compact four-signal averager is reviewed. Stimulating electrode application on facial nerves and peripheral nerves of the limbs...

...P. Birk; H. Riescher; A. Struppler; M. Keidel Within the target area (VL) used for the stereotactic treatment of parkinsonian tremor and spasmodic torticollis, electrical stimulation as well as recording of somatosensory evoked potential (SEP) was performed. The effects of stimulation in the target...

... were recorded at cervical levels with the recording electrodes anterior, lateral and posterior to the spinal cord. The refractory period of the evoked potentials has been studied as well. Responses to stimulation of the tibial nerve were obtained at T 11–12 vertebral level with posterior epidural...

... tasks. In man, evoked potentials can give an estimate of involvement of these structures. In analogy, nystagmus has been analyzed in primates, where a more complete description of the sensorimotor process is possible. 22 7 1987 © 1986 S. Karger AG, Basel 1987 Copyright / Drug Dosage...

...Charles D. Yingling; Yoshio Hosobuchi Intraoperative recordings of somatosensory evoked potentials were made in 16 patients undergoing implantation of a dorsal cord stimulation system. Antidromic recordings, obtained by stimulating through the dorsal cord electrode placed in the epidural space...