Hypertonia

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Hypertonia Classification and external resources
ICD-10	P94.1
ICD-9	358, 779.89
DiseasesDB	20872
MeSH	D009122

Hypertonia is a condition marked by an abnormal increase in the tightness of muscle tone and a reduced ability of a muscle to stretch (i.e. an increased stiffness). It is generally accompanied by (increased) spasticity of the particular muscles.

Damage to upper motor neurons causes hypertonia, as well as spasticity (overactive reflexes) and rigidity (constant muscle contractions). A form of hypertonia is known as Paratonia which is associated with dementia.

See also

• Hypotonia
• Paratonia
• Clasp-knife response

External links

• "The Clasp Knife Phenomenon" at mcg.edu

v • d • e Certain conditions originating in the perinatal period (P, 760-779)
Maternal factors and complications	Umbilical cord prolapse - Nuchal cord - Chorioamnionitis
Length of gestation and fetal growth	Small for gestational age - Large for gestational age - Premature birth - Postmature birth
Birth trauma	Cephalhematoma - Brachial plexus lesion (Erb's palsy, Klumpke paralysis)
Respiratory and cardiovascular	Intrauterine hypoxia - Infant respiratory distress syndrome - Transient tachypnea of the newborn - Meconium aspiration syndrome - Pneumomediastinum - Wilson-Mikity syndrome - Bronchopulmonary dysplasia
Haemorrhagic and haematological	Hemorrhagic disease of newborn - Hemolytic disease of the newborn - Rh disease - Hydrops fetalis - Kernicterus - Neonatal jaundice
Digestive system	Ileus - Necrotizing enterocolitis
Integument and temperature regulation	Erythema toxicum
Other disorders	Periventricular leukomalacia - Congenital hypertonia - Congenital hypotonia - Congenital rubella syndrome

fr:Hypertonie musculaire lt:Hipertonija

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .