Spatial distribution of corticospinal potentials following transcranial electric and magnetic stimulation in human spinal cord

To investigate the spatial distribution of the human corticospinal tract in the spinal cord, evoked spinal cord potentials (ESCPs) following transcranial electrical and magnetic stimulation were recorded simultaneously from both the anterior and posterior epidural space in five anesthetized patients...

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Bibliographic Details
Published in:Journal of the neurological sciences 1997-10, Vol.151 (2), p.217-221
Main Authors: Kaneko, Kazuo, Kawai, Shinya, Taguchi, Toshihiko, Fuchigami, Yasunori, Morita, Hideki, Ofuji, Akira, Yonemura, Hiroshi
Format: Article
Language:English
Subjects:
Biological and medical sciences
Central nervous system
Cerebral Cortex - physiology
Electric Stimulation
Electromagnetic Fields
Electrophysiology
Epidural Space - physiology
Evoked Potentials - physiology
Evoked spinal cord potentials
Female
Fundamental and applied biological sciences. Psychology
Humans
Male
Middle Aged
Pyramidal tract
Pyramidal Tracts - physiology
Spinal Cord - physiology
Transcranial electrical stimulation corticospinal tract
Transcranial magnetic stimulation
Vertebrates: nervous system and sense organs
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Summary:To investigate the spatial distribution of the human corticospinal tract in the spinal cord, evoked spinal cord potentials (ESCPs) following transcranial electrical and magnetic stimulation were recorded simultaneously from both the anterior and posterior epidural space in five anesthetized patients. One ESCP component following transcranial electrical stimulation (D-wave) and at least two ESCP components (initially D-wave and later I-wave) following transcranial magnetic stimulation were recorded in all subjects. The negative peak latency of all the potentials recorded from the posterior epidural space was the same as that recorded anteriorly. The amplitude ratio of the ESCP following electrical stimulation (posterior/anterior) was 1.10±0.12, while that of ESCPs following magnetic stimulation was 1.08±0.12 (N1) and 1.15±0.16 (N2). These results suggest that lateral corticospinal tract descending dorsolateral fasciculus in the spinal cord is main corticospinal pathway and spatial distribution of D and I-waves are similar in the human cervical cord.
ISSN:0022-510X
1878-5883
DOI:10.1016/S0022-510X(97)00135-4