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A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment.
When a person is recumbent, or is lying down, blood is redistributed from the lower extremities and abdominal cavity (splanchnic circulation) to the lungs. [5] Failure to accommodate this redistribution results in decreased vital capacity and pulmonary compliance , further causing the shortness of breath experienced in PND.
Gastroparesis (gastro- from Ancient Greek γαστήρ – gaster, "stomach"; and -paresis, πάρεσις – "partial paralysis") is a medical disorder of ineffective neuromuscular contractions (peristalsis) of the stomach, resulting in food and liquid remaining in the stomach for a prolonged period of time.
Gastroenteritis, often called the “stomach flu,” is an infection in your stomach and intestines. It causes symptoms like diarrhea, nausea, vomiting, and cramps, notes Dr. Boxer.
The spins (as in having "the spins") [1] is an adverse reaction of intoxication that causes a state of vertigo and nausea, [2] causing one to feel as if "spinning out of control", [3] especially when lying down. It is most commonly associated with drunkenness [4] or mixing alcohol with other psychoactive drugs [5] such as cannabis.
Visceroptosis is a prolapse or a sinking of the abdominal viscera (internal organs) below their natural position. "Ptosis" being the defining term, any or all of the organs may be displaced downward.
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Roemheld syndrome is characterized strictly by abdominal maladies triggering reflexes in the heart. There are a number of pathways through which cardiac reflexes can occur: hormones, mechanical, neurological and immunological.