Related Experiment Video
Updated: Jul 21, 2026
10:32
Assessment of Sensorimotor Function in Mouse Models of Parkinson's Disease
Published on: June 17, 2013
[Parkinson syndrome and cognitive disorders]
1Semmelweis Egyetem, Altalános Orvosi Kar, Neurológiai Klinika, 1083 Budapest, Balassa u. 6. szirmai@neur.sote.hu
Ideggyogyaszati Szemle
|August 31, 2002
Summary
Cognitive decline in Parkinson's disease (PD) involves speech, memory, and planning deficits, worsening with disease progression. This impairment is linked to neurotransmitter system damage and is not improved by L-dopa treatment.
Area of Science:
- Neuroscience
- Neurology
- Pathology
Context:
- Parkinson's disease (PD) is characterized by progressive cognitive deterioration affecting executive functions.
- Cognitive deficits in PD correlate with motor symptoms and involve multiple neurotransmitter systems beyond dopamine.
- Neurodegenerative changes, including Lewy bodies and vascular pathology, contribute to cognitive impairment in PD.
Purpose:
- To explore the multifaceted nature of cognitive impairment in Parkinson's disease.
- To examine the relationship between cognitive disability and Parkinsonian syndromes in various neurodegenerative disorders.
- To differentiate cognitive profiles in PD from related conditions like Progressive Supranuclear Palsy (PSP), Corticobasal Degeneration (CBD), Multiple System Atrophy (MSA), Frontotemporal Dementias (FTD), Alzheimer's disease, Cortical Lewy Body Disease (CLBD), and Vascular Parkinsonism (VP).
Summary:
- Cognitive decline in PD encompasses deficits in fluency, word finding, working memory, planning, and flexibility.
- Neurotransmitter depletions (dopaminergic, noradrenergic, serotoninergic, cholinergic) and functional circuit disabilities contribute to cognitive symptoms.
- Parkinsonism can occur in other dementias (FTD, AD, CLBD), and dementia can be an early sign in CLBD, with varying correlations to motor severity.
- Vascular Parkinsonism presents with dementia and gait issues, unresponsive to L-dopa, and shows distinct neuropathology without substantia nigra cell loss.
Impact:
- Understanding the complex etiology of cognitive impairment in PD and related disorders is crucial for accurate diagnosis and management.
- Differentiating PD-related cognitive changes from other parkinsonian syndromes aids in targeted therapeutic strategies.
- Highlights the need for comprehensive assessment of cognitive function in patients with parkinsonian syndromes.
More Related Videos
10:28Dynamic Digital Biomarkers of Motor and Cognitive Function in Parkinson's Disease
Published on: July 24, 2019
07:26Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking
Published on: September 26, 2019
Related Concept Videos
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...
01:29Alzheimer Disease l: Introduction
Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...
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...
01:24Parkinson 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...
01:11Alterations 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...