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  2. Hypertonia - Wikipedia

    en.wikipedia.org/wiki/Hypertonia

    Spastic hypertonia involves uncontrollable muscle spasms, stiffening or straightening out of muscles, shock-like contractions of all or part of a group of muscles, and abnormal muscle tone. It is seen in disorders such as cerebral palsy, stroke, and spinal cord injury. Rigidity is a severe state of hypertonia where muscle resistance occurs ...

  3. Stiff-person syndrome - Wikipedia

    en.wikipedia.org/wiki/Stiff-person_syndrome

    Stiff-person syndrome (SPS), also known as stiff-man syndrome, [1] is a rare neurological disorder of unclear cause characterized by progressive muscular rigidity and stiffness. The stiffness primarily affects the truncal muscles and is characterised by spasms , resulting in postural deformities.

  4. Spasticity - Wikipedia

    en.wikipedia.org/wiki/Spasticity

    Spasticity can be differentiated from rigidity with the help of simple clinical examination, as rigidity is a uniform increase in the tone of agonist and antagonist muscles which is not related to the velocity at which the movement is performed passively and remains the same throughout the range of movement while spasticity is a velocity ...

  5. Extrapyramidal symptoms - Wikipedia

    en.wikipedia.org/wiki/Extrapyramidal_symptoms

    They include movement dysfunction such as dystonia (continuous spasms and muscle contractions), akathisia (may manifest as motor restlessness), [1] parkinsonism characteristic symptoms such as rigidity, bradykinesia (slowness of movement), tremor, and tardive dyskinesia (irregular, jerky movements). [2]

  6. Hypokinesia - Wikipedia

    en.wikipedia.org/wiki/Hypokinesia

    Hypokinesia is characterized by a partial or complete loss of muscle movement due to a disruption in the basal ganglia. [citation needed] Hypokinesia is a symptom of Parkinson's disease shown as muscle rigidity and an inability to produce movement. It is also associated with mental health disorders and prolonged inactivity due to illness ...

  7. Rigid spine syndrome - Wikipedia

    en.wikipedia.org/wiki/Rigid_spine_syndrome

    Rigid spine syndrome, also known as congenital muscular dystrophy with rigidity of the spine (CMARS), is a rare and often debilitating neuromuscular disorder. It is characterized by progressive muscle stiffness and rigidity, particularly in the spine, which can severely limit mobility and impact quality of life. This condition is typically ...

  8. Cadaveric spasm - Wikipedia

    en.wikipedia.org/wiki/Cadaveric_spasm

    Cadaveric spasm can be distinguished from rigor mortis as the former is a stronger stiffening of the muscles that cannot be easily undone, while rigor mortis can. [ 2 ] The cause is unknown but is usually associated with violent deaths under extreme physical circumstances with intense emotion , such as the circumstances associated with death ...

  9. Rhabdomyolysis - Wikipedia

    en.wikipedia.org/wiki/Rhabdomyolysis

    Antipsychotic medications may cause neuroleptic malignant syndrome, which can cause severe muscle rigidity with rhabdomyolysis and hyperpyrexia; Neuromuscular blocking agents used in anesthesia may result in malignant hyperthermia, also associated with rhabdomyolysis; Medications that cause serotonin syndrome, such as SSRIs