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Involuntary extension of the "normal" leg occurs when flexing the contralateral leg against resistance. To perform the test, the examiner should hold one hand under the heel of the "normal" limb and ask the patient to flex the contralateral hip against resistance (while the patient is supine), asking the patient to keep the weak leg straight while raising it.
Abnormal posturing is an involuntary flexion or extension of the arms and legs, indicating severe brain injury. It occurs when one set of muscles becomes incapacitated while the opposing set is not, and an external stimulus such as pain causes the working set of muscles to contract. [1] The posturing may also occur without a stimulus.
The phenomenon has been observed to occur several minutes after the removal of medical ventilators used to pump air in and out of brain-dead patients. [4] It also occurs during testing for apnea—that is, suspension of external breathing and motion of the lung muscles—which is one of the criteria for determining brain death used for example by the American Academy of Neurology.
Balance is a partly involuntary and unconscious business, dependent on "spinal reflexes." When provided with appropriate context, these reflexes go into oscillation that is called "clonus," a phenomenon that is familiar to everybody and which is easily produced. (While sitting, place the leg with thigh horizontal and foot supported on the floor.
Hyperglycemia-induced involuntary movements, which, in this case, did not consist of typical hemiballismus but rather of hemichorea (dance-like movements of one side of the body; initial movements of the right arm in the video) and bilateral dystonia (slow muscle contraction in legs, chest, and right arm) in a 62-year-old Japanese woman with ...
Chorea (rapid, involuntary movement) Drug induced chorea: G25.4 Drug-induced tics and tics of organic origin 333.3 G25.6 Paroxysmal nocturnal limb movement G25.80 Painful legs (or arms), moving toes (or fingers) syndrome G25.81 Sporadic restless leg syndrome: G25.82 Familial restless leg syndrome G25.83 Stiff-person syndrome: 333.91 G25.84
Late-onset dyskinesia, also known as tardive dyskinesia, occurs after long-term treatment with an antipsychotic drug such as haloperidol (Haldol) or amoxapine (Asendin). The symptoms include tremors and writhing movements of the body and limbs, and abnormal movements in the face, mouth, and tongue – including involuntary lip smacking, repetitive pouting of the lips, and tongue protrusions.
Walking may become difficult and include odd postures and leg movements. Unlike ataxia, which affects the quality of voluntary movements, or Parkinsonism, which is a hindrance of voluntary movements, the movements of chorea and ballism occur on their own, without conscious effort. Thus, chorea is said to be a hyperkinetic movement disorder.