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Related Concept Videos

Parkinson Disease ll: Pathophysiology01:24

Parkinson 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...
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Parkinson'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...
Parkinson Disease l: Introduction01:24

Parkinson 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...
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Parkinson'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...
Neural Regulation01:37

Neural Regulation

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.
Alterations in Muscle Tone lll01:11

Alterations 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...

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Related Experiment Video

Updated: May 24, 2026

Analyzing the Parkinson's Disease Mouse Model Induced by Adeno-associated Viral Vectors Encoding Human α-Synuclein
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Published on: July 29, 2022

Synaptic dysfunction in Parkinson's disease.

Barbara Picconi1, Giovanni Piccoli, Paolo Calabresi

  • 1Laboratorio di Neurofisiologia, Fondazione Santa Lucia IRCCS, 00143 Rome, Italy.

Advances in Experimental Medicine and Biology
|February 22, 2012
PubMed
Summary
This summary is machine-generated.

Synaptic plasticity impairments in the striatum contribute to Parkinson's disease (PD) motor and cognitive symptoms. Targeting both pre- and postsynaptic sites offers potential for early PD therapeutic intervention.

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Published on: August 16, 2020

Area of Science:

  • Neuroscience
  • Cellular Biology
  • Neurodegenerative Diseases

Background:

  • Synaptic plasticity, including long-term depression (LTD) and long-term potentiation (LTP), is crucial for motor control and memory.
  • Impaired striatal synaptic plasticity is linked to Parkinson's disease (PD) motor and cognitive deficits, stemming from dopaminergic neuron degeneration.
  • Dopaminergic transmission critically modulates LTD and LTP in the striatum.

Purpose of the Study:

  • To investigate the role of synaptic plasticity alterations in the nucleus striatum in Parkinson's disease (PD).
  • To explore how dopaminergic loss affects synaptic function and contributes to PD symptoms.
  • To identify potential therapeutic targets for early intervention in PD.

Main Methods:

  • Analysis of experimental animal models of PD to study cellular and synaptic alterations in the striatum.
  • Examination of NMDA receptor trafficking and subunit composition in striatal efferent neurons.
  • Investigation of presynaptic mechanisms, including vesicular transport and dopamine release, in PD models.

Main Results:

  • Dopaminergic loss in PD models leads to striatal synaptic and cellular alterations.
  • Dysfunction in NMDA receptor assembly at postsynaptic sites is implicated in early PD.
  • Presynaptic defects in dopamine transport and release are observed in PD, even pre-symptomatically.

Conclusions:

  • Striatal synaptic plasticity dysfunctions, affecting both pre- and postsynaptic sites, are central to PD pathogenesis.
  • NMDA receptor complex assembly and presynaptic dopamine regulation are key factors in early PD.
  • Both postsynaptic and presynaptic sites represent promising targets for early therapeutic strategies in Parkinson's disease.