Poor motor function is associated with reduced sensory processing after stroke

S. Floor Campfens, Sarah B. Zandvliet, Carel G.M. Meskers, Alfred C. Schouten, Michel J.A.M. van Putten, Herman van der Kooij

Research output: Contribution to journalArticleAcademicpeer-review

23 Citations (Scopus)
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Abstract

The possibility to regain motor function after stroke depends on the intactness of motor and sensory pathways. In this study, we evaluated afferent sensory pathway information transfer and processing after stroke with the coherence between cortical activity and a position perturbation (position-cortical coherence, PCC). Eleven subacute stroke survivors participated in this study. Subjects performed a motor task with the affected and non-affected arm while continuous wrist position perturbations were applied. Cortical activity was measured using EEG. PCC was calculated between position perturbation and EEG at the contralateral and ipsilateral sensorimotor area. The presence of PCC was quantified as the number of frequencies where PCC is larger than zero across the sensorimotor area. All subjects showed significant contralateral PCC in affected and non-affected wrist tasks. Subjects with poor motor function had a reduced presence of contralateral PCC compared with subjects with good motor function in the affected wrist tasks. Amplitude of significant PCC did not differ between subjects with good and poor motor function. Our results show that poor motor function is associated with reduced sensory pathway information transfer and processing in subacute stroke subjects. Position-cortical coherence may provide additional insight into mechanisms of recovery of motor function after stroke
Original languageEnglish
Pages (from-to)1339-1349
Number of pages11
JournalExperimental brain research
Volume233
Issue number4
DOIs
Publication statusPublished - 2015

Keywords

  • METIS-310411
  • IR-95785

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