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  2. Hypnic jerk - Wikipedia

    en.wikipedia.org/wiki/Hypnic_jerk

    As a consequence, it causes a jerk to wake the sleeper up so they can catch themselves. [11] A researcher at the University of Colorado suggested that a hypnic jerk could be "an archaic reflex to the brain's misinterpretation of muscle relaxation with the onset of sleep as a signal that a sleeping primate is falling out of a tree.

  3. Myoclonus - Wikipedia

    en.wikipedia.org/wiki/Myoclonus

    A myoclonic seizure (myo "muscle", clonic "jerk") is a sudden involuntary contraction of muscle groups. The muscle jerks consist of symmetric, mostly generalized jerks, localized in the arms and in the shoulders and also simultaneously with a head nod; both the arms may fling out together and simultaneously a head nod may occur.

  4. Restless legs syndrome - Wikipedia

    en.wikipedia.org/wiki/Restless_legs_syndrome

    Movement usually brings immediate relief, although temporary and partial. Walking is most common; however, stretching, yoga, biking, or other physical activity may relieve the symptoms. Continuous, fast up-and-down movements of the leg, and/or rapidly moving the legs toward then away from each other, may keep sensations at bay without having to ...

  5. Periodic limb movement disorder - Wikipedia

    en.wikipedia.org/wiki/Periodic_limb_movement...

    These medications decrease or eliminate both the leg jerks and the arousals. These medications are also successful for the treatment of restless legs syndrome . In one study, co-careldopa was superior to dextropropoxyphene in decreasing the number of leg kicks and the number of arousals per hour of sleep.

  6. List of reflexes - Wikipedia

    en.wikipedia.org/wiki/List_of_reflexes

    Brachioradialis reflex — a jerking of the forearm when the brachioradialis tendon is hit with a tendon hammer while the arm is resting, stimulating the C5 and C6 reflex arcs. Brain's reflex; Bulbocavernosus reflex; Cervico-collic reflex; Cervico-ocular reflex — stabilizes the eyes in response to trunk-to-head movements; Cervico-spinal reflex

  7. A Sleep Expert Warns Against "Unhealthy" Sleep Trend - AOL

    www.aol.com/sleep-expert-warns-against-unhealthy...

    “For example, a dog may have a three-to six-hour rhythm, and so that's why they're sleeping part of the time, and then they're up,” says Dr. Pristas. “Human beings have a sleep pattern that ...

  8. Charley horse - Wikipedia

    en.wikipedia.org/wiki/Charley_horse

    A charley horse is an American term for a very painful involuntary cramp in the legs (usually located in the calf muscle) and/or foot, lasting anywhere from a few seconds to a couple of days. The phrase formerly referred more commonly to bruising of the quadriceps muscle of the anterior or lateral thigh, or contusion of the femur, that commonly ...

  9. Peripheral neuropathy - Wikipedia

    en.wikipedia.org/wiki/Peripheral_neuropathy

    Peripheral neuropathy may be classified according to the number and distribution of nerves affected (mononeuropathy, mononeuritis multiplex, or polyneuropathy), the type of nerve fiber predominantly affected (motor, sensory, autonomic), or the process affecting the nerves; e.g., inflammation (), compression (compression neuropathy), chemotherapy (chemotherapy-induced peripheral neuropathy).