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Article type: Research Article
Authors: Jang, Sung Ho; * | Hong, Ji-Heon | Ahn, Sang Ho | Son, Soo Min | Cho, Yoon Woo
Affiliations: Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, Taegu, Republic of Korea
Correspondence: [*] Address for correspondence: Sung Ho Jang, Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University 317-1, Daemyungdong, Namku, Taegu, 705–717, Republic of Korea. Tel.: +82 053 620 3269; Fax: +82 53 620 3269; E-mail: strokerehab@hanmail.net/belado@med.yu.ac.kr
Abstract: Objective:We report on a hemiparetic patient who showed a new motor pathway posterior to the lesion in the midbrain and upper pons, demonstrated by three combined method of diffusion tensor tractography(DTT)/functional MRI(fMRI)/transcranial magnetic stimulation(TMS). Methods:A 21-year-old left hemiparetic male who suffered from tuberous meningitis at the age of 12 months after birth. The evaluations were performed at 20 years after onset. Brain MRI showed focal encephalomalatic lesions due to infarcts in right anterior thalamus, midbrain and upper pons. DTT, fMRI and TMS were performed simultaneously. Results:The contralateral primary sensori-motor cortex was activated during either affected or unaffected hand movements. DTT showed that the motor tracts descended along the known pathway of the CST, with the exception of the motor tract of the affected hemisphere, which descended along the posterior portion to the lesion in the right midbrain and the pons, and then rejoined the CST in the mid-pons. The TMS results suggested that the motor tract of the affected hemisphere had the characteristics of a CST. Conclusion:We believe that the motor function of the affected hand in this patient had been recovered through the pathway posterior to the lesion in the midbrain and upper pons.
Keywords: Corticospinal tract, functional MRI, diffusion tensor MRI, transcranial magnetic stimulation, motor recovery
DOI: 10.3233/NRE-2010-0550
Journal: NeuroRehabilitation, vol. 26, no. 2, pp. 167-171, 2010
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