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- Title
Asymmetries of long-latency intracortical inhibition in motor cortex and handedness.
- Authors
Hammond, Geoffrey R.; Garvey, Carrie-Anne
- Abstract
Paired-pulse transcranial magnetic stimulation was used in three experiments to measure the properties of long-latency intracortical inhibition (LICI) acting on the relaxed first dorsal interosseus muscle of the left and right hand in right-handed volunteers. The experiments show that LICI is asymmetrical: it emerges more rapidly and is greater in the dominant than non-dominant hand shortly after activation of the LICI circuits, and is greater with low-intensity conditioning stimulus intensities in the dominant than non-dominant hand. These findings suggest that asymmetrical function of long-latency inhibitory circuits in motor cortex might contribute to the asymmetrical dexterity between the hands, possibly through their inhibitory control of the circuits responsible for short-latency inhibition.
- Subjects
TRANSCRANIAL magnetic stimulation; MOTOR cortex; MOTOR ability; MUSCLES; MOTOR ability research
- Publication
Experimental Brain Research, 2006, Vol 172, Issue 4, p449
- ISSN
0014-4819
- Publication type
Article
- DOI
10.1007/s00221-006-0349-2