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  2. 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.

  3. 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 ...

  4. Stiff-person syndrome - Wikipedia

    en.wikipedia.org/wiki/Stiff-person_syndrome

    Rigid trunk muscles can also prevent the chest and abdomen from expanding, causing shortness of breath and early satiety. [6] In many people with SPS, muscle rigidity eventually progresses from the trunk to the limbs — first affecting muscles closest to the trunk, then further. [ 6 ]

  5. Parkinson's disease - Wikipedia

    en.wikipedia.org/wiki/Parkinson's_disease

    Rigidity, also called rigor, refers to a feeling of stiffness and resistance to passive stretching of muscles that occurs in up to 89 percent of cases. [23] [24] Postural instability typically appears in later stages, leading to impaired balance and falls. [25] Postural instability also leads to a forward stooping posture. [26]

  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. 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 ...

  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. Catalepsy - Wikipedia

    en.wikipedia.org/wiki/Catalepsy

    A patient with depression and catalepsy Rigidity of the body produced by catalepsy. Symptoms include a rigid body, rigid limbs, limbs staying in same position when moved (waxy flexibility), no response, loss of muscle control, and slowing down of bodily functions, such as breathing.

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