A muscle spasm — also known as a charley horse, muscle cramp or twitch — is a sudden, involuntary movement in one or more muscles. Common causes include stress, exercise, or dehydration, but nerve ...
A 50-year-old woman arrived with progressive neck pain and stiffness, 3 years after a whiplash injury sustained in a motor vehicle crash. Previous diagnoses included cervical spondylosis and muscle ...
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