A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
CMC is more than a measure of corticospinal tract integrity in acute stroke patients (2021)


Aikio, R., Laaksonen, K., Sairanen, V., Parkkonen, E., Kujala, J., & Forss, N. (2021). CMC is more than a measure of corticospinal tract integrity in acute stroke patients. NeuroImage: Clinical, 32, Article 102818. https://doi.org/10.1016/j.nicl.2021.102818


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Aikio, R.; Laaksonen, K.; Sairanen, V.; Parkkonen, E.; Kujala, J.; Forss, N.

Lehti tai sarja: NeuroImage: Clinical

ISSN: 2213-1582

Julkaisuvuosi: 2021

Volyymi: 32

Artikkelinumero: 102818

Kustantaja: Elsevier

Julkaisumaa: Alankomaat

Julkaisun kieli: englanti

DOI: https://doi.org/10.1016/j.nicl.2021.102818

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/77909


Tiivistelmä

In healthy subjects, motor cortex activity and electromyographic (EMG) signals from contracting contralateral muscle show coherence in the beta (15-30 Hz) range. Corticomuscular coherence (CMC) is considered a sign of functional coupling between muscle and brain. Based on prior studies, CMC is altered in stroke, but functional significance of this finding has remained unclear. Here, we examined CMC in acute stroke patients and correlated the results with clinical outcome measures and corticospinal tract (CST) integrity estimated with diffusion tensor imaging (DTI). During isometric contraction of the extensor carpi radialis muscle, EMG and magnetoencephalographic oscillatory signals were recorded from 29 patients with paresis of the upper extremity due to ischemic stroke and 22 control subjects. CMC amplitudes and peak frequencies at 13-30 Hz were compared between the two groups. In the patients, the peak frequency in both the affected and the unaffected hemisphere was significantly (p < 0.01) lower and the strength of CMC was significantly (p < 0.05) weaker in the affected hemisphere compared to the control subjects. The strength of CMC in the patients correlated with the level of tactile sensitivity and clinical test results of hand function. In contrast, no correlation between measures of CST integrity and CMC was found. The results confirm the earlier findings that CMC is altered in acute stroke and demonstrate that CMC is bidirectional and not solely a measure of integrity of the efferent corticospinal tract.


YSO-asiasanat: aivokuori; hermo-lihastoiminta; motoriikka; aivoinfarkti; MEG

Vapaat asiasanat: afferent input; corticomuscular coherence; corticospinal tract integrity; magnetoencephalography; motor cortex; stroke


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OKM-raportointi: Kyllä


Viimeisin päivitys 2021-27-09 klo 10:34