Technique of Evoked Potential Recordings from a Radiofrequency-Transmitted Spinal Cord Stimulating System

1985 ◽  
pp. 64-66 ◽  
Author(s):  
B. Kepplinger ◽  
K. Wallner
Keyword(s):  
Spinal Cord ◽  
Evoked Potential

RELATION OF BRAIN STEM ACTIVITY TO THE EVOKED POTENTIAL IN THE SPINAL CORD FOLLOWING THE SINGLE VOLLEY OF THE SPLANCHNIC NERVE

1965 ◽  
Vol 19 (1) ◽  
pp. 49-68
Author(s):  
Miyoshi Urabe ◽  
Takashi Tsubokawa ◽  
Hiraki Sakurai ◽  
Masao Seki
Keyword(s):  
Spinal Cord ◽  
Brain Stem ◽  
Evoked Potential ◽  
Splanchnic Nerve

scholarly journals DEVELOPING NEW METHODS OF SPINAL CORD INJURY TREATMENT USING MAGNETIC NANOPARTICLES IN COMBINATION WITH ELECTROMAGNETIC FIELD

2017 ◽  
Vol 16 (2) ◽  
pp. 145-148
Author(s):  
Sergey Kolesov ◽  
Andrey Panteleyev ◽  
Maxim Sazhnev ◽  
Arkadiy Kazmin
Keyword(s):  
Magnetic Field ◽  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Iron Oxide ◽  
Evoked Potential ◽  
Oxide Nanoparticles ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Magnetic Iron Oxide ◽  
Potential Amplitude ◽  
Cord Injury

ABSTRACT Objective: To determine the amount of loss of function after spinal cord transection of varying extents, and whether magnetic iron oxide nanoparticles, in combination with an external magnetic field, improve the rate of subsequent functional recovery in rats. Methods: The animals were divided into groups with 50%, 80% and complete spinal cord transection. The animals of all three study groups were administered magnetic iron oxide nanoparticle suspension to the area of injury. The three control groups were not administered magnetic nanoparticles, but had corresponding transection levels. All animals were exposed to a magnetic field for 4 weeks. Loss of postoperative function and subsequent recovery were assessed using the BBB motor function scale and somatosensory evoked potential monitoring on the first day after surgery, and then weekly. Terminal histological analysis was also conducted in all the groups. Results: The animals in the control or complete transection groups did not demonstrate statistically significant improvement in either the BBB scores or evoked potential amplitude over the four-week period. In the group with 50% transection, however, a statistically significant increase in evoked potential amplitude and BBB scores was observed four weeks after surgery, with the highest increase during the second week of the study. In the group with 80% transection, only improvement in evoked potential amplitude was statistically significant, although less pronounced than in the 50% transection group. Conclusion: The use of magnetic iron oxide nanoparticles in combination with a magnetic field leads to higher rates of functional recovery after spinal cord injury in laboratory animals. The mechanism of this functional improvement needs further investigation.

Surgeon-directed transcranial motor evoked potential spinal cord monitoring in spinal deformity surgery

2021 ◽  
Vol 103-B (3) ◽  
pp. 547-552
Author(s):  
Ramanare Sibusiso Magampa ◽  
Robert Dunn
Keyword(s):  
Spinal Cord ◽  
Spinal Deformity ◽  
Early Identification ◽  
Evoked Potential ◽  
Motor Evoked Potential ◽  
Congenital Scoliosis ◽  
Spinal Cord Monitoring ◽  
Cord Injury ◽  
Spinal Deformity Surgery ◽  
Transcranial Motor Evoked Potential

Aims Spinal deformity surgery carries the risk of neurological injury. Neurophysiological monitoring allows early identification of intraoperative cord injury which enables early intervention resulting in a better prognosis. Although multimodal monitoring is the ideal, resource constraints make surgeon-directed intraoperative transcranial motor evoked potential (TcMEP) monitoring a useful compromise. Our experience using surgeon-directed TcMEP is presented in terms of viability, safety, and efficacy. Methods We carried out a retrospective review of a single surgeon’s prospectively maintained database of cases in which TcMEP monitoring had been used between 2010 and 2017. The upper limbs were used as the control. A true alert was recorded when there was a 50% or more loss of amplitude from the lower limbs with maintained upper limb signals. Patients with true alerts were identified and their case history analyzed. Results Of the 299 cases reviewed, 279 (93.3%) had acceptable traces throughout and awoke with normal clinical neurological function. No patient with normal traces had a postoperative clinical neurological deficit. True alerts occurred in 20 cases (6.7%). The diagnoses of the alert group included nine cases of adolescent idiopathic scoliosis (AIS) (45%) and six of congenital scoliosis (30%). The incidence of deterioration based on diagnosis was 9/153 (6%) for AIS, 6/30 (20%) for congenital scoliosis, and 2/16 (12.5%) for spinal tuberculosis. Deterioration was much more common in congenital scoliosis than in AIS (p = 0.020). Overall, 65% of alerts occurred during rod instrumentation: 15% occurred during decompression of the internal apex in vertebral column resection surgery. Four alert cases (20%) awoke with clinically detectable neurological compromise. Conclusion Surgeon-directed TcMEP monitoring has a 100% negative predictive value and allows early identification of physiological cord distress, thereby enabling immediate intervention. In resource constrained environments, surgeon-directed TcMEP is a viable and effective method of intraoperative spinal cord monitoring. Level of evidence: III Cite this article: Bone Joint J 2021;103-B(3):547–552.

Killed-End Corticospinal Motor Evoked Potential (MEP) in Patients with Spinal Cord Injury

1991 ◽  
pp. 511-515 ◽  
Author(s):  
Y. Katayama ◽  
T. Tsubokawa ◽  
S. Maejima ◽  
T. Hirayama ◽  
T. Yamamoto
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Evoked Potential ◽  
Motor Evoked Potential ◽  
Cord Injury

scholarly journals Correlation of motor-evoked potential response to ischemic spinal cord damage

1992 ◽  
Vol 104 (2) ◽  
pp. 262-272 ◽  
Author(s):  
David G. Reuter ◽  
Willis A. Tacker ◽  
Stephen F. Badylak ◽  
William D. Voorhees ◽  
Peter E. Konrad
Keyword(s):  
Spinal Cord ◽  
Evoked Potential ◽  
Motor Evoked Potential ◽  
Potential Response ◽  
Spinal Cord Damage
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