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Alterations in Muscle Tone ll

Alterations in Muscle Tone ll

Alterations in muscle tone are common manifestations of neurological disorders and reflect dysfunction within different nervous system regions. Spasticity, paratonia, and dystonia represent distinct forms of hypertonia, each with unique mechanisms, clinical features, and diagnostic importance.CharacteristicsSpasticity happens from upper motor neuron lesions and is characterized by velocity-dependent resistance to passive movement. Clinical features include:Exaggerated deep tendon reflexesClonus...

Alterations in Muscle Tone lll

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: Apr 19, 2026

A Battery of Motor Tests in a Neonatal Mouse Model of Cerebral Palsy

A Battery of Motor Tests in a Neonatal Mouse Model of Cerebral Palsy

Published on: November 3, 2016

Neonatal hypertonia - a diagnostic challenge.

Anthony R Hart¹, Ruchi Sharma², Christopher D Rittey¹

¹Department of Paediatric Neurology, Sheffield Children's Hospital NHS Foundation Trust, Sheffield, UK.

Developmental Medicine and Child Neurology

|December 16, 2014

Summary

This summary is machine-generated.

Neonatal hypertonia, or increased muscle tone in newborns, is uncommon. This review addresses its causes and proposes a diagnostic approach for clinicians facing this rare condition.

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Area of Science:

Neonatology
Neurology
Pediatrics

Background:

Neonatal hypertonia is less common than hypotonia.
Limited scientific literature exists on neonatal hypertonia causes.
A clear diagnostic algorithm for clinicians is lacking.

Purpose of the Study:

To review the causes of neonatal hypertonia.
To propose a diagnostic approach for neonatal hypertonia.

Main Methods:

Literature review of neonatal hypertonia.
Discussion of diagnostic strategies.

Main Results:

Hypertonia causes include central nervous system and spinal conditions.
Rare peripheral neuromuscular disorders can cause hypertonia.
Onset can be antepartum, peripartum (transient or persistent), or postnatal.

Conclusions:

Neonatal hypertonia requires a structured diagnostic approach.
Understanding diverse etiologies is crucial for timely diagnosis and management.