What does "Substantial weakness in the arm" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.
"Substantial weakness in the arm" refers to a significant loss of strength in one's arm. This can make it difficult for a person to perform regular tasks like lifting objects, writing, or even just moving the arm. It's often a symptom of an underlying health issue, such as a nerve problem or muscle disease. The severity of the weakness can vary, but in this case, it's considered to be quite severe or noticeable.
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