Functional magnetic resonance imaging of motor cortex: hemispheric asymmetry and handedness.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 8342027.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
A hemispheric asymmetry in the functional activation of the human motor cortex during contralateral (C) and ipsilateral (I) finger movements, especially in right-handed subjects, was documented with nuclear magnetic resonance imaging at high field strength (4 tesla). Whereas the right motor cortex was activated mostly during contralateral finger movements in both right-handed (C/I mean area of activation = 36.8) and left-handed (C/I = 29.9) subjects, the left motor cortex was activated substantially during ipsilateral movements in left-handed subjects (C/I = 5.4) and even more so in right-handed subjects (C/I = 1.3).
Medical subject headings
- Brain Mapping
- Functional Laterality
- Magnetic Resonance Imaging
- Motor Cortex