Altered EEG alpha and theta oscillations characterize apathy in Parkinson's disease during incentivized movement

Autor: Maria Zhu, Tobias R. Baumeister, Silke Appel-Cresswell, Martin J. McKeown, Azadeh HajiHosseini, Saurabh Garg
Rok vydání: 2019
Předmět:
Male
Parkinson's disease
MRI
Magnetic resonance imaging
Electroencephalography
Audiology
lcsh:RC346-429
0302 clinical medicine
ICA
Independent component analysis
Apathy
EEG
Theta Rhythm
medicine.diagnostic_test
05 social sciences
Dopaminergic
Parkinson Disease
Regular Article
Middle Aged
Theta
Theta oscillations
Alpha Rhythm
medicine.anatomical_structure
Neurology
lcsh:R858-859.7
Female
medicine.symptom
ANOVA
Analysis of variance
Psychology
Motor cortex
Eeg alpha
medicine.medical_specialty
MoCA
Montreal Cognitive Assessment
Oscillations
Cognitive Neuroscience
Alpha (ethology)
Motor Activity
lcsh:Computer applications to medicine. Medical informatics
050105 experimental psychology
03 medical and health sciences
Reward
MEG
Magnetoencephalography
medicine
Humans
0501 psychology and cognitive sciences
Radiology
Nuclear Medicine and imaging
lcsh:Neurology. Diseases of the nervous system
Aged
LARS
Lille Apathy Rating Scale
Motivation
Alpha
BDI
Beck's Depression Inventory
PCA
Principal component analysis
MVC
Maximum voluntary contraction
medicine.disease
Neurology (clinical)
ACC
Anterior cingulate cortex
030217 neurology & neurosurgery
Zdroj: NeuroImage : Clinical
NeuroImage: Clinical, Vol 23, Iss, Pp-(2019)
ISSN: 2213-1582
Popis: Apathy is a common non-motor symptom of Parkinson's disease (PD) that is difficult to quantify and poorly understood. Some studies have used incentivized motor tasks to assess apathy, as the condition is often associated with a reduction in motivated behavior. Normally event-related desynchronization, a reduction of power in specific frequency bands, is observed in the motor cortex during the peri-movement period. Also, alpha (8–12 Hz) and theta (4–7 Hz) oscillations are sensitive to rewards that are closely related to motivational states however these oscillations have not been widely investigated in relation to apathy in PD. Using EEG recordings, we investigated the neural oscillatory characteristics of apathy in PD during an incentivized motor task with interleaved rest periods. Apathetic and non-apathetic PD subjects on dopaminergic medication and healthy control subjects were instructed to squeeze a hand grip device for a monetary reward proportional to the subject's grip force and the monetary value attributed to that trial. Apathetic PD subjects exhibited higher alpha and theta powers in the pre-trial baseline rest period compared to non-apathetic PD subjects and healthy subjects. Further, we found that both resting power and relative power in alpha and theta bands during incentivized movement predicted PD subjects' apathy scores. Our results suggest that apathetic PD patients may need to overcome greater baseline alpha and theta oscillatory activity in order to facilitate incentivized movement. Clinically, resting alpha and theta power as well as alpha and theta event-related desynchronization during movement may serve as potential neural markers for apathy severity in PD.
Highlights • Apathetic patients with Parkinson's disease on dopaminergic medication have distinct neural oscillatory characteristics. • Apathetic patients exhibit a higher resting EEG theta and alpha power compared to non-apathetic patients. • Both resting power and relative event-related theta and alpha desynchronization during squeezing are able to predict patient apathy scores.
Databáze: OpenAIRE
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