Motor Evoked Potentials of Trunk Muscles in Stroke Patients.

, Park, Sung Hee; , Song, Kwang Seop; , Ko, Myoung Hwan; , Seo, Jeong Hwan

Original Article

Journal of the Korean Academy of Rehabilitation Medicine 2009;33(3):282-289.

Park, Sung Hee , Song, Kwang Seop , Ko, Myoung Hwan , Seo, Jeong Hwan

¹Department of Physical Medicine and Rehabilitation, Chonbuk National University Medical School, Korea. shpark0130@chonbuk.ac.kr
²Institute for Medical Science, Chonbuk National University Medical School, Korea.
³Research Institute of Clinical Medicine, Chonbuk National University Medical School, Korea.

뇌졸중 환자에서 체간근의 운동신경유발전위

박성희, 송광섭, 고명환, 서정환

전북대학교 의학전문대학원 재활의학교실, 의과학연구소 및 임상의학연구소

Abstract

Objective
To evaluate the reorganization of descending motor pathways of trunk muscles in stroke patients.
Method
Nine patients with unilateral hemispheric stroke were enrolled. Their mean age was 56 years. Transcranial magnetic stimulation (TMS) was applied to unaffected and affected motor cortices in turn and bilateral electromyographic recordings were made from rectus abdominis, external oblique abdominal, and 4 th and 9 th thoracic erector spinae muscles during resting. The onset latency and peak-to-peak amplitude of motor evoked potential (MEP) were measured for each muscle on both sides.
Results
Stimulation of the unaffected hemisphere evoked contralateral responses in all patients. Ipsilateral responses were more common in TMS of affected hemisphere. Ipsilateral but not contralateral MEPs were obtained in TMS of affected hemisphere.
Conclusion
These results demonstrated that the variable availability of bilateral crossed and uncrossed corticomotorneuronal projections among patients could be related with the inconstant occurrence of trunk weakness after unilateral hemispheric stroke. (J Korean Acad Rehab Med 2009; 33: 282-289)

Key Words: Transcranial magnetic stimulation, Stoke, Motor evoked potential