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Dysrhythmias refers to abnormalities in the heart's rhythm. They result from disruptions in the heart's electrical conduction system, which includes the sinoatrial(SA)node, atrioventricular(AV) node, the bundle of His, bundle branches, and Purkinje fibers.Definition and PathophysiologyDysrhythmias result from disorders of impulse formation, impulse conduction, or both. The heart contains specialized cells in the sinoatrial node, atrioventricular node, and the bundle of His and Purkinje fibers...
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Learning disabilities are cognitive disorders caused by neurological impairments that affect cognitive functions like language and reading, without indicating overall intellectual or developmental challenges. These disabilities differ from global intellectual or developmental disabilities as they are limited to distinct cognitive functions. Common learning disabilities include dysgraphia, dyslexia, and dyscalculia, each of which impacts unique aspects of learning.
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Related Experiment Video

Updated: Mar 29, 2026

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Dysarthria.

Pamela M Enderby1, Angela Morgan2

  • 1School of Health and Related Research, University of Sheffield, Sheffield, United Kingdom.

Handbook of Clinical Neurology
|March 27, 2026
PubMed
Summary
This summary is machine-generated.

Dysarthria, a speech disorder impacting communication, arises from brainstem lesions affecting articulation and fluency. This chapter details its types, assessment, and holistic treatment for improved social engagement.

Keywords:
CommunicationDysarthriaDysarthria assessmentDysphagiaSpeech and language therapy

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Area of Science:

  • Neurology
  • Speech-Language Pathology

Background:

  • Communication is vital for personal identity, relationships, education, employment, and social interaction.
  • Dysarthria is a speech disorder with significant disabling effects.

Purpose of the Study:

  • To provide comprehensive information on dysarthria.
  • To highlight the brainstem's role in speech production.

Main Methods:

  • Describing various types of dysarthria based on lesion location.
  • Outlining assessment and treatment methodologies.

Main Results:

  • The brainstem plays a crucial role in articulation, intonation, prosody, and fluency.
  • Different brainstem lesions result in distinct forms of dysarthria.

Conclusions:

  • A holistic approach is essential for managing dysarthria.
  • Effective management can improve quality of life and social participation.