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Relation between event segmentation and memory dysfunction in Parkinson's disease.

Michelle Wyrobnik1, Elke van der Meer2, Fabian Klostermann3

  • 1Institute of Psychology, Humboldt-Universität zu Berlin, Rudower Chaussee 18, 12489 Berlin, Germany; Berlin School of Mind and Brain, Humboldt-Universität zu Berlin, Luisenstraße 56, 10117 Berlin, Germany; Department of Neurology, Motor and Cognition Group, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Campus Benjamin Franklin (CBF), Hindenburgdamm 30, 12203 Berlin, Germany.

Brain and Cognition
|September 9, 2022
PubMed
Summary
This summary is machine-generated.

Individuals with Parkinson's disease (PD) struggle with recalling recent events due to difficulties in segmenting everyday activities. Their memory deficits correlate with deviations from typical event segmentation patterns observed in healthy individuals.

Keywords:
Event order memoryEvent recognition memoryEvent segmentationParkinson’s disease

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Area of Science:

  • Cognitive Neuroscience
  • Neurology
  • Psychology

Background:

  • Event perception involves segmenting continuous experiences into discrete sub-events.
  • Dopaminergic network dysfunction in Parkinson's disease (PD) may impair recall of recent activities.
  • Understanding event segmentation is crucial for addressing cognitive deficits in PD.

Purpose of the Study:

  • To investigate event segmentation and memory recall in individuals with Parkinson's disease (PD) compared to healthy controls.
  • To examine how PD affects the ability to identify sub-events within everyday activities.
  • To determine the relationship between event segmentation accuracy and memory performance in PD.

Main Methods:

  • Participants with PD and healthy controls performed an event segmentation task using movies of everyday activities.
  • Subsequent recognition and order memory tasks assessed recall of movie sub-events.
  • Behavioral data on segmentation, recognition, and ordering were analyzed and compared between groups.

Main Results:

  • Persons with PD showed altered segmentation patterns, particularly for familiar activities, compared to controls.
  • Individuals with PD exhibited poorer recognition of sub-events and made more errors in ordering tasks.
  • Memory deficits in PD were more pronounced when their segmentation deviated from the normative pattern.

Conclusions:

  • Dysfunctional structuring of sensory information during event perception contributes to impaired event representations in PD.
  • Difficulties in event segmentation are linked to recall problems for recent everyday activities in individuals with PD.
  • Targeting event segmentation processes may offer new therapeutic avenues for cognitive rehabilitation in Parkinson's disease.