Journal of neuroimaging : official journal of the American Society of Neuroimaging
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Randomized Controlled Trial
Functional imaging of the cerebellum and basal ganglia during predictive motor timing in early Parkinson's disease.
The basal ganglia and the cerebellum have both emerged as important structures involved in the processing of temporal information. ⋯ We conclude that both the cerebellum and striatum are involved in predictive motor timing tasks. The cerebellar activity is associated exclusively with the postponement of action until the right moment, whereas both the cerebellum and striatum are needed for successful adaptation of motor actions from one trial to the next. We found a general ''hypoactivation'' of basal ganglia and cerebellum in early stage PD relative to HC, indicating that even in early stages of the PD there could be functional perturbations in the motor system beyond striatum.
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Human T-cell lymphotropic virus type I (HTLV-I)-associated myelopathy/tropical spastic paraparesis (HAM/TSP) is a disabling neurological disorder characterized by inflammatory changes in the spinal cord. We used a semiautomatic technique to quantify spinal cord volume from 3-dimensional MR images of patients with HAM/TSP. ⋯ Semiautomatic spinal cord volume quantification is a sensitive technique for quantifying the extent of spinal cord involvement in HAM/TSP.
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The azygous anterior cerebral artery (Az) is a rarely observed anomaly of the anterior cerebral artery, and its associated aneurysm is even rarer. Our aim was to evaluate 3-dimensional time-of-flight magnetic resonance angiography (3-D-TOF MRA) in the diagnosis of Az and associated aneurysms. ⋯ With the VR technique, 3-D-TOF MRA is feasible and valuable in detecting an Az and associated aneurysm. Our MRA-based study has proved that the Az is a rare anomaly but has a relatively high incidence of associated aneurysms.
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Spinal dural arteriovenous fistulas (DAVF) in the cervical spine are known to cause subarachnoid hemorrhage. Vasospasm after rupture of a DAVF, however, has not previously been reported. ⋯ For patients with subarachnoid hemorrhage of unknown origin, differential diagnosis should include DAVF. This patient also presented with vasospasm in the context of ruptured DAVF, a complication previously unreported in the literature. This finding suggests that close monitoring for vasospasm after rupture of DAVF is warranted.
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Spinal dural arteriovenous fistulas (DAVF) in the cervical spine are known to cause subarachnoid hemorrhage. Vasospasm after rupture of a DAVF, however, has not previously been reported. ⋯ For patients with subarachnoid hemorrhage of unknown origin, differential diagnosis should include DAVF. This patient also presented with vasospasm in the context of ruptured DAVF, a complication previously unreported in the literature. This finding suggests that close monitoring for vasospasm after rupture of DAVF is warranted.