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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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Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
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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 to...
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Behavioral Assessment of the Aging Mouse Vestibular System
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[Tremor in the elderly].

Charles Pierre Jedynak1, Evelyne Diarra, Marc Verny

  • 1Pôle des Maladies du Système Nerveux, Hôpital de la Salpêtrière, AP-HP Paris. cpjedynak@hotmail.com

Psychologie & Neuropsychiatrie Du Vieillissement
|September 13, 2008
PubMed
Summary
This summary is machine-generated.

Essential tremor and Parkinson

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Area of Science:

  • Geriatric Medicine
  • Neurology
  • Movement Disorders

Context:

  • Elderly population presents diverse tremor etiologies.
  • Essential tremor and Parkinson's disease are common causes.
  • Accurate diagnosis is crucial for effective management.

Purpose:

  • To review the prevalence and characteristics of tremors in the elderly.
  • To differentiate between essential tremor and Parkinson's disease tremor.
  • To discuss practical and therapeutic aspects of various tremor causes.

Summary:

  • Essential tremor affects 5% of individuals over 65, characterized by action tremor affecting limbs, head, and voice.
  • Parkinson's disease tremor contrasts with essential tremor, though intermediate forms may require pharmacological or DaTSCAN confirmation.
  • Other tremor causes are reviewed, emphasizing psychological impact and advocating for non-stigmatizing terminology.

Impact:

  • Provides a diagnostic framework for tremors in older adults.
  • Highlights the importance of distinguishing tremor types for targeted treatment.
  • Promotes patient-centered care by addressing quality of life and avoiding stigmatizing language.