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In the absence of blood flow, the patient's hypocalcemia and subsequent neuromuscular irritability will induce spasm of the muscles of the hand and forearm. The wrist and metacarpophalangeal joints flex, the DIP and PIP joints extend, and the fingers adduct .
The fencing response is an unnatural position of the arms following a concussion.Immediately after moderate forces have been applied to the brainstem, the forearms are held flexed or extended (typically into the air) for a period lasting up to several seconds after the impact.
The major tissues affected are nerves and muscles, where irreversible damage starts to occur after 4–6 hours of cessation of blood supply. [4] Skeletal muscle, the major tissue affected, is still relatively resistant to infarction compared to the heart and brain because its ability to rely on anaerobic metabolism by glycogen stored in the cells may supply the muscle tissue long enough for ...
A spasm is a sudden involuntary contraction of a muscle, [1] a group of muscles, or a hollow organ, such as the bladder. A spasmodic muscle contraction may be caused by many medical conditions, including dystonia .
Writer's cramp or focal hand dystonia (FHD) is an idiopathic movement disorder of adult onset, characterized by abnormal posturing and movement of the hand and/or forearm during tasks requiring skilled hand use, such as writing.
Injuries to the arm, forearm or wrist area can lead to various nerve disorders. One such disorder is median nerve palsy. The median nerve controls the majority of the muscles in the forearm. It controls abduction of the thumb, flexion of hand at wrist, flexion of digital phalanx of the fingers, is the sensory nerve for the first three fingers, etc.
There are a number of terms used to describe radial nerve injuries, which are dependent on the causation factor such as: Honeymoon palsy from another individual sleeping on and compressing one's arm overnight. [11] Saturday night palsy from falling asleep with one's arm hanging over the arm rest of a chair or edge of bed, compressing the radial ...
The most common cause of compartment syndrome in children is traumatic injury. [77] In children <10 years of age, the cause is usually vascular injury or infection. [78] In children >14 years of age, the cause is usually due to trauma or surgical positioning. [78] Treatment for compartment syndrome in children is the same as adults. [72]