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Related Concept Videos

Parkinson Disease ll: Pathophysiology01:24

Parkinson Disease ll: Pathophysiology

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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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Alterations in Muscle Tone lll01:11

Alterations in Muscle Tone lll

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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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Parkinson Disease l: Introduction01:24

Parkinson Disease l: Introduction

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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...
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Neural Regulation01:37

Neural Regulation

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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.
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Parkinson's Disease: Overview01:15

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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...
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Parkinson's Disease: Treatment01:24

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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...
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Related Experiment Video

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MALDI Imaging Mass Spectrometry of Neuropeptides in Parkinson's Disease
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MR image texture in Parkinson's disease: a longitudinal study.

Minna Sikiö1, Kirsi K Holli-Helenius2, Lara C V Harrison3

  • 1Department of Radiology, Medical Imaging Center and Hospital Pharmacy, Tampere University Hospital, Tampere, Finland Department of Electronics and Communications Engineering, Tampere University of Technology, Tampere, Finland minna.sikio@tut.fi.

Acta Radiologica (Stockholm, Sweden : 1987)
|January 14, 2014
PubMed
Summary

Quantitative texture analysis of brain magnetic resonance imaging (MRI) can detect subtle structural changes in Parkinson's disease (PD). This method shows promise for PD diagnosis and monitoring disease progression over time.

Keywords:
Parkinson’s diseasefollow-upimage analysismagnetic resonance imaging (MRI)texture analysis

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Area of Science:

  • Neuroimaging
  • Radiology
  • Biomedical Engineering

Background:

  • Parkinson's disease (PD) causes structural brain changes not always visible with standard MRI.
  • Advanced quantitative methods are needed to detect subtle, subvisual alterations in brain structure.
  • Texture analysis quantifies image gray-level patterns, offering a potential solution for detecting these changes.

Purpose of the Study:

  • To evaluate the utility of quantitative image texture analysis for diagnosing Parkinson's disease.
  • To assess the value of texture analysis in monitoring PD progression over time.
  • To correlate texture parameters with clinical measures of PD severity.

Main Methods:

  • Twenty-six Parkinson's disease patients underwent MRI scans at baseline and after two years.
  • Co-occurrence matrix-based texture parameters were calculated in key brain regions.
  • Analyses included comparisons with healthy controls and correlations with clinical assessments (UPDRS, MMSE).

Main Results:

  • Significant differences in brain MR image textures were observed between PD patients and healthy controls, particularly in the substantia nigra, dentate nucleus, and basilar pons.
  • Over a two-year follow-up, textural changes were most prominent in the thalamus and corona radiata.
  • Texture parameters correlated significantly with clinical scores indicating PD severity.

Conclusions:

  • Quantitative texture analysis provides a method for detecting structural brain changes in Parkinson's disease.
  • The technique shows potential for clinical application in PD diagnosis and follow-up.
  • Further refinement of the protocol and assessment of repeatability are necessary for widespread clinical adoption.