Which finding would most strongly suggest a neurological source of weakness during MMT?

Which finding would most strongly suggest a neurological source of weakness during MMT?

• A. Presence of neurological signs on exam
• B. Normal ROM
• C. Absence of pain
• D. Rapid fatigue

Answer: (A)

The key idea is that weakness with a neural origin is usually accompanied by other neurological abnormalities. When you find signs such as altered sensation or sensory loss in a dermatomal pattern, decreased or abnormal reflexes, coordination deficits, or muscle fasciculations indicating denervation, these point to nerve or nerve-pathway involvement rather than a purely local issue with the muscle or joint. That combination—weakness plus objective neurological signs on exam—strongly suggests a neurological source. Other options don’t point as strongly to nerve involvement. Normal range of motion can occur even with true weakness and doesn’t rule out fine neural reasons. Absence of pain isn’t specific to neural problems and can be seen in many musculoskeletal conditions. Rapid fatigue can arise from poor effort, deconditioning, or non-neural myopathies and doesn’t specifically indicate a neurological origin.

The key idea is that weakness with a neural origin is usually accompanied by other neurological abnormalities. When you find signs such as altered sensation or sensory loss in a dermatomal pattern, decreased or abnormal reflexes, coordination deficits, or muscle fasciculations indicating denervation, these point to nerve or nerve-pathway involvement rather than a purely local issue with the muscle or joint. That combination—weakness plus objective neurological signs on exam—strongly suggests a neurological source.

Other options don’t point as strongly to nerve involvement. Normal range of motion can occur even with true weakness and doesn’t rule out fine neural reasons. Absence of pain isn’t specific to neural problems and can be seen in many musculoskeletal conditions. Rapid fatigue can arise from poor effort, deconditioning, or non-neural myopathies and doesn’t specifically indicate a neurological origin.