| Ipsilateral Corticospinal Projections in a Patient with Congenital Mirror Movements : A case report. |
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Park, Sung Hee , Im, Kyung Jin , Jo, Dae Sun |
1Department of Physical Medicine and Rehabilitation, Institude for Medical Science and Research Institute of Clinical Medicine, Chonbuk National University Medical School, Korea. teddyeye@hanmail.net
2Department of Pediatrics, Institude for Medical Science and Research Institute of Clinical Medicine, Chonbuk National University Medical School, Korea. |
| 선천성 거울상 운동 환자의 동측 비교차 피질척수 투사-증례 보고- |
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박성희1, 임경진1, 조대선2 |
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전북대학교 의학전문대학원 1재활의학교실 의과학 연구소 및 임상의학연구소, 2소아과학교실 의과학 연구소 및 임상의학연구소 |
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| Abstract |
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Mirror movements can be defined as involuntary movements on one side of the body that occur as mirror reversals of intended movement on the other side of the body. These are common as normal phenomenon in young children. When mirror movements persist after first decade of life, they are abnormal. We studied a patient with congenital mirror movement by neurophysiological methods. Neurological examination revealed mirror movements in both upper extremities, but not in legs or face. Transcranial magnetic stimulation elicited bilateral motor evoked potentials of the first dorsal interossei muscle and ipsilateral responses showed shorter onset latencies and larger peak to peak amplitude than contralateral response, implying greater ipsilateral projection than contralateral projection. This observation indicates direct ipsilateral corticospinal projections. Our findings are consistent with aberrant organization of motor representation areas and corticospinal pathways with ipsilateral as well as contralateral control of voluntary movement. (J Korean Acad Rehab Med 2009; 33: 502-505) |
| Key Words:
Mirror movement, Corticospinal tract, Motor evoked potential |
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