Reduction in Posterior Cerebral Artery Blood Flow Velocity during Caloric Vestibular Stimulation
| Autor: | T Brandt, Frank P. Tiecks, J Planck, Roman L. Haberl |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Adult
Male medicine.medical_specialty genetic structures Ultrasonography Doppler Transcranial Posterior cerebral artery Nystagmus 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Oscillopsia medicine.artery Internal medicine Caloric Tests medicine Humans Visual Cortex Vestibular system business.industry Cerebral Arteries Vestibular cortex Transcranial Doppler Neurology Cerebral blood flow Anesthesia Middle cerebral artery cardiovascular system Cardiology Female Vestibule Labyrinth sense organs Neurology (clinical) medicine.symptom Cardiology and Cardiovascular Medicine business Blood Flow Velocity 030217 neurology & neurosurgery circulatory and respiratory physiology |
| Zdroj: | Journal of Cerebral Blood Flow & Metabolism. 16:1379-1382 |
| ISSN: | 1559-7016 0271-678X |
| DOI: | 10.1097/00004647-199611000-00037 |
| Popis: | Transcranial Doppler (TCD) sonography was performed to assess the differential effects of caloric vestibular stimulation on cerebral blood flow (CBF) to the vestibular [middle cerebral artery (MCA)] and the visual [posterior cerebral artery (PCA)] cortices in 15 healthy volunteers with eyes closed. Caloric irrigation caused a sensation of rotation and nystagmus and not only increased velocity in the MCA (2.7 ± 3.3%) but also, simultaneously, decreased velocity in the PCA (4.2 ± 6.2%, p < 0.001 vs. MCA). CBF changes indicated by changes in velocity through the MCA and PCA may reflect functional deactivation of the visual cortex together with activation of the vestibular cortex: this beneficial multisensory interaction suppresses distressing oscillopsia. |
| Databáze: | OpenAIRE |
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