* Laterality Differences in Cerebellar-Motor Cortex Connectivity.
- Lateralization of function is an important organizational feature of the motor system. Each effector is predominantly controlled by the contralateral cerebral cortex and the ipsilateral cerebellum. Transcranial magnetic stimulation studies have revealed hemispheric differences in the stimulation strength required to evoke a muscle response from the primary motor cortex (M1), with the dominant hemisphere typically requiring less stimulation than the nondominant. The current study assessed whether the strength of the connection between the cerebellum and M1 (CB-M1), known to change in association with motor learning, have hemispheric differences and whether these differences have any behavioral correlate. We observed, in right-handed individuals, that the connection between the right cerebellum and left M1 is typically stronger than the contralateral network. Behaviorally, we detected no lateralized learning processes, though we did find a significant effect on the amplitude of reaching movements across hands. Furthermore, we observed that the strength of the CB-M1 connection is correlated with the amplitude variability of reaching movements, a measure of movement precision, where stronger connectivity was associated with better precision. These findings indicate that lateralization in the motor system is present beyond the primary motor cortex, and points to an association between cerebellar M1 connectivity and movement execution.
=>1.機能, 関数, 役割, 働き, 2.機能する, 作用する, 働く, 役目を果たす, 3.社交的会合, パーティー, 儀式
Overview of noun function
The noun function has 7 senses (first 3 from tagged texts)
1. (43) function, mathematical function, single-valued function, map, mapping -- ((mathematics) a
mathematical relation such that each element of a given set (the domain of the function) is
associated with an element of another set (the range of the function))
2. (24) function, purpose, role, use -- (what something is used for; "the function of an auger is to
bore holes"; "ballet is beautiful but what use is it?")
3. (7) function, office, part, role -- (the actions and activities assigned to or required or
expected of a person or group; "the function of a teacher"; "the government must do its part"; "play
its role")
4. function -- (a relation such that one thing is dependent on another; "height is a function of
age"; "price is a function of supply and demand")
5. function -- (a formal or official social gathering or ceremony; "it was a black-tie function")
6. affair, occasion, social occasion, function, social function -- (a vaguely specified social
event; "the party was quite an affair"; "an occasion arranged to honor the president"; "a seemingly
endless round of social functions")
7. routine, subroutine, subprogram, procedure, function -- (a set sequence of steps, part of larger
computer program)
Overview of verb function
The verb function has 3 senses (first 3 from tagged texts)
1. (9) function, work, operate, go, run -- (perform as expected when applied; "The washing machine
won't go unless it's plugged in"; "Does this old car still run well?"; "This old radio doesn't work
anymore")
2. (3) serve, function -- (serve a purpose, role, or function; "The tree stump serves as a table";
"The female students served as a control group"; "This table would serve very well"; "His freedom
served him well"; "The table functions as a desk")
3. (1) officiate, function -- (perform duties attached to a particular office or place or function;
"His wife officiated as his private secretary")
--- WordNet end ---