Effect of movement rate on corticokinematic coherence.
Neurophysiol Clin
; 45(6): 469-74, 2015 Dec.
Article
em En
| MEDLINE
| ID: mdl-26522431
ABSTRACT
AIMS OF THE STUDY This study investigates the effect of movement rate on the coupling between cortical magnetoencephalographic (MEG) signals and the kinematics of repetitive active finger movements, i.e., the corticokinematic coherence (CKC). MATERIAL AND METHODS:
CKC was evaluated in ten right-handed healthy adults performing repetitive flexion-extension of the right-hand fingers in three different movement rate conditions slow (â¼1 Hz, duration 11 min), medium (â¼2 Hz, duration 5 min) and fast (â¼3 Hz, duration 3 min). Neuromagnetic signals were recorded with a whole-scalp-covering MEG (Elekta Oy) and index acceleration was monitored with a 3-axis accelerometer. Coherent sources were estimated on the time-course of the cross-correlogram using equivalent current dipole (ECD) modeling.RESULTS:
Significant coherence was found at movement frequency or its first harmonics in all subjects and movement conditions. ECDs clustered at the primary sensorimotor cortex contralateral to hand movements. Movement rate had no effect on the coherence levels and the location of coherent sources.CONCLUSIONS:
This study demonstrates that the movement rate does not affect coherence levels and CKC source location during active finger movements. This finding has direct implications for CKC functional mapping applications and studies investigating the pathophysiology of central nervous disorders affecting proprioceptive pathways.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fenômenos Biomecânicos
/
Córtex Cerebral
/
Movimento
Tipo de estudo:
Prognostic_studies
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Neurophysiol Clin
Assunto da revista:
FISIOLOGIA
/
NEUROLOGIA
Ano de publicação:
2015
Tipo de documento:
Article