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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «S»:

  1. Sleep, paroxysmal Sleep, paroxysmal
    Sleep, paroxysmal: A neurological disorder marked by a sudden recurrent uncontrollable compulsion to sleep. Also known as narcolepsy. The disorder is often associated with cataplexy (a sudden loss of muscle tone and paralysis of voluntary muscles associated with a strong emotion), sleep paralysis ...
  2. Sleep, rapid eye movement Sleep, rapid eye movement
    Sleep, rapid eye movement: REM sleep is the portion of sleep when there are rapid eye movements (REMs). Dreams occur during REM sleep. We typically have 3 to 5 periods of REM sleep per night. They occur at intervals of 1-2 hours and are quite variable in length. An episode of REM sleep may last 5...
  3. Sleep, REM Sleep, REM
    Sleep, REM: REM sleep is the portion of sleep when there are rapid eye movements (REMs). Dreams occur during REM sleep. We typically have 3 to 5 periods of REM sleep per night. They occur at intervals of 1-2 hours and are quite variable in length. An episode of REM sleep may last 5 minutes or ove...
  4. Sleep, twilight Sleep, twilight
    Sleep, twilight: A term applied to the combination of analgesia (pain relief) and amnesia (loss of memory) produced by a mixture of morphine and scopolamine ("scope") given by a hypodermic injection (an injection under the skin). The mixture of the two drugs created a state in which the woman, while...
  5. Sleep-disordered breathing Sleep-disordered breathing
    Sleep-disordered breathing: A condition characterized by repeated episodes of hypopnea (underbreathing) and apnea (not breathing) during sleep. A significant proportion of adults are thought to experience sleep-disordered breathing. Sleep-disordered breathing can cause temporary elevations in bloo...
  6. Sleepiness, excessive daytime (EDS) Sleepiness, excessive daytime (EDS)
    Sleepiness, excessive daytime (EDS): A neurological disorder marked by a sudden recurrent uncontrollable compulsion to sleep. Also known as narcolepsy. It is often associated with cataplexy (a sudden loss of muscle tone and paralysis of voluntary muscles associated with a strong emotion), sleep par...
  7. Sleeping disease Sleeping disease
    Sleeping disease: A neurological disorder marked by a sudden recurrent uncontrollable compulsion to sleep. Also known as narcolepsy. The disorder is often associated with cataplexy (a sudden loss of muscle tone and paralysis of voluntary muscles associated with a strong emotion), sleep paralysis (...
  8. Sleeping sickness, African Sleeping sickness, African
    Sleeping sickness, African: See: African sleeping sickness....
  9. Sleeplessness Sleeplessness
    Sleeplessness: Insomnia. See also Fatal familial insomnia....
  10. Sleepwalking Sleepwalking
    Sleepwalking: Purposeful moving, usually but not always including walking, while in a deep stage of sleep. Sleepwalking occurs most frequently in children, particularly boys. Sedatives tend to exacerbate rather than cure sleepwalking. The best measures are preventative: ensure that the sleepw...
  11. Sliding hiatal hernia Sliding hiatal hernia
    Sliding hiatal hernia: Hiatal hernias are categorized as being either sliding or para-esophageal. Sliding hiatal hernias are those in which the junction of the esophagus and stomach, referred to as the gastro- esophageal junction, and part of the stomach protrude into the chest. The junction may...
  12. Slipped disc Slipped disc
    Slipped disc: Rupturing of the tissue that separates the vertebral bones of the spinal column. The center of the disc, which is called the nucleus, is soft, springy and receives the shock of standing, walking, running, etc. The outer ring of the disc, which is called the annulus (Latin for ring...
  13. Slipped elbow Slipped elbow
    Slipped elbow: See: Nursemaid's elbow....
  14. Slipped spine Slipped spine
    Slipped spine: See: Spondylolisthesis....
  15. Slipped vertebra Slipped vertebra
    Slipped vertebra: See: Spondylolisthesis....