Abstract:
:Corticokinematic coherence (CKC), i.e., coherence calculated between MEG and an accelerometer signal, recording movement kinematics, can be used for functional mapping of the sensorimotor cortex. Cortical sources of CKC, induced by both voluntary and passive movements, localize at the proximity of sensorimotor cortex. We tested the CKC during a static muscle contraction to compare it with simultaneously measured cortico-muscular coherence (CMC) estimated between MEG and surface EMG to study the role of postural tremor in CMC in ten healthy volunteers. CKC was detectable also during this static task. CKC and CMC spectra had similar power distributions, and sources of CMC and CKC colocalized at the cortex in close proximity of the central sulcus. During the static hold task, the accelerometer signal originates from the postural tremor. The similarities between CMC and CKC indicate that postural tremor is related to CMC in healthy subjects.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Airaksinen K,Lehti T,Nurminen J,Luoma J,Helle L,Taulu S,Pekkonen E,Mäkelä JPdoi
10.1016/j.neulet.2015.06.034subject
Has Abstractpub_date
2015-08-18 00:00:00pages
22-6eissn
0304-3940issn
1872-7972pii
S0304-3940(15)00477-2journal_volume
602pub_type
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