Arterial spin-labeling MR imaging of cerebral hemorrhages

Abstract

The use of ASL-MRI is sensitive to the perfusion abnormalities and could thus be helpful to estimate functional abnormalities in cerebral hemorrhage patients.

Pathological factors contributing to crossed cerebellar diaschisis in cerebral gliomas: a study combining perfusion, diffusion, and structural MR imaging

“…Those findings support the concept that a highgrade tumor, with stronger invasiveness and more severe damage to the brain, is more likely to cause CCD. Some studies on other brain diseases also point out that CCD is related to the volume of the lesion [21][22][23]. We further indicated that peritumoral edema should be considered when evaluating the causes of CCD.…”

Complete hemispherotomy leads to lateralized functional organization and lower level of consciousness in the isolated hemisphere

“…After hemispherotomy, section of the perithalamic white matter tracts suppresses seizure expression due to the interruption of the cortical projection bundles to the brainstem and spinal cord and, in the meantime, interrupts the ascending reticular activating system, an essential polysynaptic pathway for arousal through increases of cortical excitability 69 . Crossed‐cerebellar and ipsilateral diaschisis were also recently reported with reduced perfusion of rCBF after thalamic or putaminal hemorrhage 70 . Such significant decreases in neuronal metabolism may be due to reduced neuronal activity secondary to the loss of afferent inputs as in rodents cerebellar interneurons and Purkinje cells decrease their firing rate after inducing focal cerebral ischemia 71 …”

“…69 Crossed-cerebellar and ipsilateral diaschisis were also recently reported with reduced perfusion of rCBF after thalamic or putaminal hemorrhage. 70 Such significant decreases in neuronal metabolism may be due to reduced neuronal activity secondary to the loss of afferent inputs as in rodents cerebellar interneurons and Purkinje cells decrease their firing rate after inducing focal cerebral ischemia. 71…”

Cerebellar Hypoperfusion in Migraine Attack: Incidence and Significance

“…[5][6][7][8] Cortical hypoperfusion may also be associated with crossed cerebellar diaschisis (CCD), a depression of CBF and metabolism in the cerebellar hemisphere contralateral to a supratentorial neuronal deactivation. CCD is observed in several disorders that result in neuronal damage or depletion, such as acute ischemic motor stroke, 9,10 hemorrhage, 11,12 and epilepsy with disturbance of the motor network. 13 So far, CCD in migraine has only been described anecdotally 14,15 as posing a risk of subsequent brain infarctions for patients with CCD.…”