Related Experiment Video
Updated: Jul 29, 2025
12:04
Intra-Operative Behavioral Tasks in Awake Humans Undergoing Deep Brain Stimulation Surgery
Published on: January 6, 2011
13.1K
Subthalamic Nucleus Activity during Cognitive Load and Gait Dysfunction in Parkinson's Disease
Matthew J Georgiades1,2, James M Shine1,2, Moran Gilat1,3
1ForeFront Parkinson's Disease Research Clinic, Brain and Mind Centre, University of Sydney, Sydney, New South Wales, Australia.
Summary
Cognitive load can trigger Parkinson's disease gait freezing. Reduced theta frequency firing in the subthalamic nucleus during dual-tasking suggests a neurobiological link, informing adaptive deep brain stimulation.
Area of Science:
- Neuroscience
- Movement Disorders
- Biomedical Engineering
Background:
- Gait freezing is a disabling Parkinson's disease symptom.
- Adaptive deep brain stimulation (aDBS) is a potential treatment.
- Subthalamic nucleus (STN) firing patterns during freezing are not fully understood, especially with cognitive load.
Purpose of the Study:
- Investigate STN firing patterns during gait freezing provoked by cognitive load in Parkinson's disease patients.
- Determine if cognitive factors influence STN neural signatures associated with gait disturbances.
Main Methods:
- Subthalamic nucleus microelectrode recordings from eight Parkinson's disease patients.
- Utilized a virtual reality gait task with cognitive cues and dual-tasking.
- Analyzed neural signals during freezing or motor slowing events.
Main Results:
- Reduced theta frequency (3-8 Hz) firing in the STN during freezing episodes precipitated by dual-tasking.
- Compared freezing trials (n=15) with unaffected trials (n=18).
Conclusions:
- Identified a potential neurobiological basis for cognitive-gait interactions in Parkinson's disease.
- Findings inform the development of adaptive deep brain stimulation protocols for gait freezing.
Related Concept Videos
01:15Parkinson's Disease: Overview
617
Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is...
617
01:37Neural Regulation
39.6K
Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
39.6K
01:24Parkinson's Disease: Treatment
311
Neurodegenerative disorders, such as Parkinson's Disease (PD), involve the gradual and irreversible destruction of neurons in particular brain areas. These disorders exhibit standard features like proteinopathies, selective vulnerability of some neurons, and an interaction of intrinsic properties, genetics, and environmental influences in neural injury.
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of...
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of...
311