Journal
ULTRASOUND IN MEDICINE AND BIOLOGY
Volume 38, Issue 6, Pages 997-1003Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ultrasmedbio.2012.02.016
Keywords
Brain activation studies; Cerebral hemodynamics; Functional TCD; Motor imagery; Movements; Peripheral hemodynamics
Funding
- CAPES/Ministry of Education of Brazil
Ask authors/readers for more resources
This study aimed to compare the response of metabolic-induced cerebral hemodynamic changes measured using transcranial Doppler (TCD) ultrasonography during passive, active and motor imagery paradigms, and associated peripheral hemodynamic responses. Continuous recordings of bilateral cerebral blood flow velocity (CBFv), blood pressure, heart rate and end-tidal CO2 were performed in 12 right-handed subjects (aged >= 45 y) before, during and after 60 s of active, passive and mental-imagined paradigms. The results revealed no significant difference in CBFv responses between the paradigms and, furthermore, the temporal patterns of the hemodynamic responses showed some degree of similarity. Moreover, significant changes were seen in cerebral and peripheral hemodynamic responses for all paradigms. Our results suggest that active, passive and motor imagery paradigms can be used interchangeably to assess hemodynamic responses. This will enable more detailed noninvasive assessment in patients, where voluntary movement is not possible, but where abnormalities of cerebral hemodynamic control mechanisms can be anticipated. (E-mail: asms2@le.ac.uk) (C) 2012 World Federation for Ultrasound in Medicine & Biology.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available