Attenuated beta rebound to proprioceptive afferent feedback in Parkinson’s disease

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Karolinska Institutet
  • Nanyang Technological University

Abstract

Motor symptoms are defining traits in the diagnosis of Parkinson’s disease (PD). A crucial component in motor function is the integration of afferent proprioceptive sensory feedback. Previous studies have indicated abnormal movement-related cortical oscillatory activity in PD, but the role of the proprioceptive afference on abnormal oscillatory activity in PD has not been elucidated. We examine the cortical oscillations in the mu/beta-band (8–30 Hz) in the processing of proprioceptive stimulation in PD patients, ON/OFF levodopa medication, as compared to that of healthy controls (HC). We used a proprioceptive stimulator that generated precisely controlled passive movements of the index finger and measured the induced cortical oscillatory responses following the proprioceptive stimulation using magnetoencephalography. Both PD patients and HC showed a typical beta-band desynchronization during the passive movement. However, the subsequent beta rebound after the passive movement that was almost absent in PD patients compared to HC. Furthermore, we found no difference in the degree of beta rebound attenuation between patients ON and OFF levodopa medication. The results demonstrate a disease-related deterioration in cortical processing of proprioceptive afference in PD.

Details

Original languageEnglish
Article number2604
Pages (from-to)1-11
Number of pages11
JournalScientific Reports
Volume9
Issue number1
Publication statusPublished - 22 Feb 2019
MoE publication typeA1 Journal article-refereed

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