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Dual-Task Performance in GBA Parkinson's Disease.

Karin Srulijes1,2,3, Kathrin Brockmann1,2, Senait Ogbamicael1,2

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Summary

Parkinson's patients with glucocerebrosidase gene mutations (GBA-PD) exhibit poorer dual-tasking abilities, specifically slower walking and task speeds, compared to idiopathic Parkinson's disease (iPD) patients.

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Area of Science:

  • Neurology
  • Genetics
  • Movement Disorders

Background:

  • Parkinson's disease (PD) patients with glucocerebrosidase (GBA) gene mutations experience accelerated motor and cognitive decline.
  • The underlying mechanisms for GBA-PD patients' faster decline remain unclear.
  • Dual tasking (DT), integrating motor and nonmotor functions, is crucial for daily activities.

Purpose of the Study:

  • To compare dual-tasking (DT) performance between GBA-PD and idiopathic PD (iPD) patients.
  • To investigate the impact of GBA mutations on motor and cognitive integration during DT.

Main Methods:

  • Included eleven GBA-PD patients (p.N370S, p.L444P) and eleven matched iPD patients.
  • Assessed motor (UPDRS-III) and nonmotor (MoCA, Beck's Depression Inventory) functions.
  • Utilized wearable sensors for quantitative gait analysis during single-task (ST) and DT (walking while checking boxes).

Main Results:

  • GBA-PD patients demonstrated slower gait and box-checking speeds than iPD patients during DT.
  • No significant differences in dual-task costs were observed between GBA-PD and iPD groups.
  • Clinical scores (UPDRS, MoCA) were considered in relation to performance.

Conclusions:

  • Dual-tasking performance, particularly with a secondary motor task, is impaired in GBA-PD patients compared to iPD patients.
  • This impairment may contribute to the observed enhanced motor and cognitive deficits in GBA-PD.
  • Further research is warranted to elucidate the mechanisms and clinical implications.