Brain Network Oscillations During Gait in Parkinson's Disease

Area of Science:

• Neuroscience
• Motor Control
• Movement Disorders

Background:

• Human bipedal walking is a complex motor task reliant on supraspinal control for balance and muscle coordination.
• Gait impairments are a key symptom of Parkinson's disease (PD), linked to the dysfunction of cortico-basal ganglia-brainstem circuits.
• Recent research has identified gait-related brain oscillations in the basal ganglia and cerebral cortex.

Purpose of the Study:

• To review the roles of basal ganglia oscillations, cortical oscillations, and their interactions during walking.
• To present a novel framework linking abnormal oscillatory synchronization in the basal ganglia-thalamocortical network to specific movement disorder symptoms.
• To propose that gait dysfunction in PD stems from brain network derangements.

Main Methods:

• Review of physiological and pathophysiological studies on brain oscillations during walking.
• Analysis of electroencephalography and implanted electrode data.
• Synthesis of findings within a network framework for movement disorders.

Main Results:

• Basal ganglia and cortical oscillations play significant roles in controlling human gait.
• Abnormal oscillatory synchronization within the basal ganglia-thalamocortical network is associated with specific motor symptoms.
• Dysfunctional brain network oscillations are implicated in gait impairments observed in Parkinson's disease.

Conclusions:

• Gait disturbances in Parkinson's disease are proposed to arise from disruptions in brain network oscillatory activity.
• Modulating brain network oscillations presents a potential therapeutic strategy for restoring gait in PD.
• Understanding basal ganglia-cortical interactions is crucial for developing effective treatments for PD-related gait dysfunction.