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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

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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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Mania, a psychological condition characterized by elevated mood, increased energy, and reduced sleep need, is part of the bipolar disorder cycle. The exact cause of mania isn't entirely known, but it is thought to be a combination of genetic, environmental, and neurological factors. Bipolar disorder involves alternating manic and depressive episodes. Mood stabilizers like lithium, antipsychotics, and anticonvulsants help manage these episodes. Lithium carbonate is particularly effective as a...

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Related Experiment Video

Updated: Jul 4, 2026

Implantation of Osmotic Pumps and Induction of Stress to Establish a Symptomatic, Pharmacological Mouse Model for DYT/PARK-ATP1A3 Dystonia

Implantation of Osmotic Pumps and Induction of Stress to Establish a Symptomatic, Pharmacological Mouse Model for DYT/PARK-ATP1A3 Dystonia

Published on: September 12, 2020

Catatonia: a review.

Natalie D Weder¹, Sunanda Muralee, Heath Penland

¹Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut 06519, USA.

Annals of Clinical Psychiatry : Official Journal of the American Academy of Clinical Psychiatrists

|June 24, 2008

Summary

Catatonia is a common neuropsychiatric syndrome with varied motor symptoms. Benzodiazepines and electroconvulsive therapy (ECT) show efficacy, but chronicity may limit treatment response.

Area of Science:

Neuroscience
Psychiatry
Clinical Medicine

Background:

Catatonia is a complex neuropsychiatric syndrome.
It presents with diverse motor signs and symptoms.
Etiologies are heterogeneous, impacting classification and treatment.

Purpose of the Study:

To provide an updated review of catatonia.
Synthesize current literature on catatonia's presentation, mechanisms, and treatment.

Main Methods:

Comprehensive literature search across major databases (Cochrane, Medline, EMBASE, PsychINFO).
Inclusion of various study types: RCTs, meta-analyses, cohort studies, case reports, and reviews.
Keywords included: catatonia, stupor, catatonic schizophrenia, and catalepsy.

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Main Results:

Catatonia is a prevalent syndrome with varied motor manifestations.
Evidence supports benzodiazepines and electroconvulsive therapy (ECT) for treatment.
Treatment effectiveness can be constrained by symptom chronicity.

Conclusions:

Catatonia is a distinct nosologic syndrome.
It is associated with diverse psychiatric, neurological, and medical conditions.
Subtypes and varied treatment responses necessitate further research.