Related Experiment Video
Updated: Aug 5, 2026
11:12
Controlling Parkinson's Disease With Adaptive Deep Brain Stimulation
Published on: July 16, 2014
AMPLITUDE PERFORMANCE SUBTYPES IN PARKINSON'S DISEASE
Medrxiv : the Preprint Server for Health Sciences
|July 30, 2026
Summary
Researchers identified four distinct kinematic subgroups in Parkinson's disease (PD) speech, revealing varied articulatory hypokinesia. These subgroups highlight differences in tongue, lip, and jaw movements in individuals with PD.
Area of Science:
- Neurology
- Speech Science
- Biomechanical Engineering
Background:
- Parkinson's disease (PD) often affects speech production.
- Understanding articulatory kinematic variations in PD is crucial for targeted interventions.
Purpose of the Study:
- To identify subgroups of individuals with PD based on shared articulatory amplitude behaviors (tongue, lip, jaw).
- To determine demographic and clinical features that differentiate these kinematic subgroups.
Main Methods:
- Utilized 3D electromagnetic articulography to measure tongue, lip, and jaw movements in 53 individuals with PD and 54 controls during reading.
- Applied hierarchical cluster analysis to kinematic data to identify subgroups.
- Compared demographic and clinical features across identified subgroups.
Main Results:
- Identified four primary kinematic subgroups with distinct amplitude profiles.
- One subgroup showed preclinical or mild amplitude variations.
- Three subgroups demonstrated pronounced amplitude reductions in the tongue, lips, and/or jaw.
- No significant demographic or clinical differences were found between the main subgroups.
Conclusions:
- Articulatory hypokinesia in PD can manifest with varying severity and patterns across the tongue, lip, and jaw.
- Further longitudinal research is needed to ascertain if these subgroups represent disease progression stages or distinct disease manifestations.
Related Concept Videos
01:11Alterations in Muscle Tone lll
Rigidity and myotonia are distinct abnormalities of muscle tone that affect resistance and relaxation during movement. Although both involve altered muscle contraction, they arise from different neurological and muscular mechanisms.CharacteristicsRigidity is characterized by uniform resistance to passive movement across the entire range, independent of speed, affecting flexors and extensors equally. It may appear as lead-pipe rigidity (smooth, constant resistance) or cogwheel rigidity...
01:15Parkinson's Disease: Overview
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 to...
01:24Parkinson's Disease: Treatment
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 its...
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of its...
01:24Parkinson Disease ll: Pathophysiology
Parkinson disease (PD) is a progressive neurodegenerative disorder primarily affecting movement, with additional non-motor features. Its pathophysiology involves complex interactions among genetic susceptibility, environmental exposures, and cellular dysfunction, including dopaminergic neuron loss, protein aggregation, and mitochondrial impairment.Selective NeurodegenerationA key feature is the degeneration of dopaminergic neurons in the substantia nigra pars compacta, leading to reduced...
01:24Parkinson Disease l: Introduction
Parkinson’s disease is a chronic, progressive neurodegenerative disorder that primarily affects movement. It is characterized by motor symptoms such as resting tremors, muscle rigidity, bradykinesia (slowness of movement), and postural instability. Patients may notice hand tremors at rest, stiffness during movement, or a shuffling gait. In addition to motor features, non-motor symptoms include sleep disturbances, mood and behavioral changes, constipation, and cognitive impairment, all of which...
01:12Alterations in Muscle Tone ll
Alterations in muscle tone are common manifestations of neurological disorders and reflect dysfunction within different nervous system regions. Spasticity, paratonia, and dystonia represent distinct forms of hypertonia, each with unique mechanisms, clinical features, and diagnostic importance.CharacteristicsSpasticity happens from upper motor neuron lesions and is characterized by velocity-dependent resistance to passive movement. Clinical features include:Exaggerated deep tendon reflexesClonus...