Publications by authors named "Byung Yun Choi"

Objective: We investigated difference of injury of the corticospinal tract (CST) according to surgical or conservative treatment in patients with putaminal hemorrhage (PH), using diffusion tensor tractography (DTT).

Methods: Forty-six patients with PH (hematoma volume on the brain CT: 20-40 ml) were recruited. Patients were classified as the surgical treatment group and the conservative treatment group.

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Little is known about the recovery mechanism of somatosensory function in thalamic hemorrhage. We investigated the recovery mechanism of somatosensory function, using functional MRI (fMRI) findings by proprioceptive input in chronic patients with thalamic hemorrhage. Eleven consecutive chronic patients with thalamic hemorrhage who showed severe proprioceptive dysfunction were recruited.

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Objectives: Little is known about the prevalence of central poststroke pain (CPSP) according to the integrity of the spino-thalamo-cortical pathway (STP). Using diffusion tensor tractography, we investigated the prevalence of CPSP according to the integrity of the STP in patients with intracerebral hemorrhage.

Methods: We recruited 52 consecutive chronic patients and 10 normal control subjects.

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Article Synopsis
  • Scientists studied how injuries to a specific pathway in the brain (called the spino-thalamo-cortical pathway, or STP) might cause pain (known as central post-stroke pain, or CPSP) in patients who had bleeding in the brain.
  • They looked at 30 patients and grouped them based on whether they had CPSP or not, and measured different things about their brain pathways.
  • The results showed that patients with CPSP had less volume in the STP compared to those without, suggesting that injury to this pathway may be involved in causing the pain after a stroke.
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Background: TMS (transcranial magnetic stimulation) and DTT (diffusion tensor tractography) have different advantages in evaluating stroke patients. TMS has good clinical accessibility and economical benefit. On the contrary, DTT has a unique advantage to visualize neural tracts three-dimensionally although it requires an expensive and large MRI machine.

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Objectives: Little is known about the mechanism of motor recovery for patients with intracerebral hemorrhage (ICH). We attempted to demonstrate the motor recovery mechanism in a hemiparetic patient with ICH using diffusion tensor tractography (DTT), transcranial magnetic stimulation (TMS), and functional MRI (fMRI).

Subjects: A 37-year-old female patient and twelve age-matched control subjects were evaluated.

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We tried to investigate the motor outcome according to diffusion tensor tractography (DTT) findings for the corticospinal tract (CST) in the early stage for hemiparetic patients with intracerebral hemorrhage (ICH). Forty patients with severe paralysis of the affected side were enrolled. DTT was obtained in the early stage of the stroke (7-30 days) and was classified into four groups: type A, the CST originating from primary motor cortex was preserved around the hematoma; type B, the CST was similar to type A except the fiber originated from the adjacent areas to the primary motor cortex; type C, the CST was interrupted at or around the hematoma; and type D, the CST did not reach the hematoma due to degeneration (Fig.

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