dominant hemisphere


Also found in: Dictionary, Thesaurus, Medical.

dominant hemisphere

[′däm·ə·nənt ′hem·ə‚sfir]
(physiology)
The cerebral hemisphere which controls certain motor activities; usually the left hemisphere in right-handed individuals.
Mentioned in ?
References in periodicals archive ?
These results showed that knowing an individual's preferred handedness it is not sufficient to determine their dominant hemisphere for language.
The fact that plasticity appeared stronger in our patients' dominant hemisphere suggests that it works to enhance preservation of the more common right-hand activities.
If the dominant hemisphere is involved there may be an associated speech deficit.
Analysis of changes in coherence in separate EEG spectral bands in transition to somnolence states showed that the evening out of inter-hemisphere asymmetry occurred primarily as a result of a decrease in the predominance in the background of the combination of alpha- and beta-bands in the dominant hemisphere. In right-handed subjects, interhemispheric coherence in the transition to somnolence was characterized by reciprocal changes in quick (alpha and beta) and slow (delta and theta) EEG components; in left-handed individuals, the changes in all rhythm diapasons were synphasic.
Previously it was assumed that pictorial encoding takes place in the right hemisphere, because that is the dominant hemisphere for retrieval of visual information (recognition of drawn objects and faces).
The cortical regulation, however, seems to be situated in the dominant hemisphere, as a unilateral lesion can lead to abnormal laryngeal function.
The dominant hemisphere varies according to the species.
Some research indicates that when the brain is insulted in the right, or nondominant, hemisphere with preservation of the dominant hemisphere, denial, or lack of awareness, is a resulting syndrome.