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328) Voxel-based morphometry showed a selective gray matter (GM) reduction in dancers' vestibular cerebellum correlating with ballet experience.
--- ABSTRACT ---
PMID:24072889 DOI:10.1093/cercor/bht266
2015 Cerebral cortex (New York, N.Y. : 1991)
* The neuroanatomical correlates of training-related perceptuo-reflex uncoupling in dancers.
- Sensory input evokes low-order reflexes and higher-order perceptual responses. Vestibular stimulation elicits vestibular-ocular reflex (VOR) and self-motion perception (e.g., vertigo) whose response durations are normally equal. Adaptation to repeated whole-body rotations, for example, ballet training, is known to reduce vestibular responses. We investigated the neuroanatomical correlates of vestibular perceptuo-reflex adaptation in ballet dancers and controls. Dancers' vestibular-reflex and perceptual responses to whole-body yaw-plane step rotations were: (1) Briefer and (2) uncorrelated (controls' reflex and perception were correlated). Voxel-based morphometry showed a selective gray matter (GM) reduction in dancers' vestibular cerebellum correlating with ballet experience. Dancers' vestibular cerebellar GM density reduction was related to shorter perceptual responses (i.e. positively correlated) but longer VOR duration (negatively correlated). Contrastingly, controls' vestibular cerebellar GM density negatively correlated with perception and VOR. Diffusion-tensor imaging showed that cerebral cortex white matter (WM) microstructure correlated with vestibular perception but only in controls. In summary, dancers display vestibular perceptuo-reflex dissociation with the neuronatomical correlate localized to the vestibular cerebellum. Controls' robust vestibular perception correlated with a cortical WM network conspicuously absent in dancers. Since primary vestibular afferents synapse in the vestibular cerebellum, we speculate that a cerebellar gating of perceptual signals to cortical regions mediates the training-related attenuation of vestibular perception and perceptuo-reflex uncoupling.
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--- WordNet output for based --- =>に基づき Overview of verb base The verb base has 3 senses (first 1 from tagged texts) 1. (75) establish, base, ground, found -- (use as a basis for; found on; "base a claim on some observation") 2. base -- (situate as a center of operations; "we will base this project in the new lab") 3. free-base, base -- (use (purified cocaine) by burning it and inhaling the fumes) Overview of adj based The adj based has 2 senses (first 2 from tagged texts) 1. (3) based -- (having a base; "firmly based ice") 2. (1) based -- (having a base of operations (often used as a combining form); "a locally based business"; "an Atlanta-based company"; "carrier-based planes") --- WordNet end ---