In ALS, which function is typically spared?

In ALS, which function is typically spared?

• A. Bowel function
• B. Respiratory function
• C. Speech
• D. Bowel and bladder function are spared

Answer: (D)

In ALS, motor neurons that control voluntary movement degenerate, so weakness appears in limbs, and in bulbar and respiratory muscles that affect speech, swallowing, and breathing. Sensation and autonomic control are generally preserved early on, including the neural systems that manage bowel and bladder function. Because continence relies on these autonomic and pelvic floor pathways rather than the primary motor neurons most affected in ALS, bowel and bladder control tends to stay intact while other functions decline. Secondary issues like constipation can occur from immobility or reduced activity, but the core pattern is preserved bowel and bladder function despite progressive motor weakness.

In ALS, motor neurons that control voluntary movement degenerate, so weakness appears in limbs, and in bulbar and respiratory muscles that affect speech, swallowing, and breathing. Sensation and autonomic control are generally preserved early on, including the neural systems that manage bowel and bladder function. Because continence relies on these autonomic and pelvic floor pathways rather than the primary motor neurons most affected in ALS, bowel and bladder control tends to stay intact while other functions decline. Secondary issues like constipation can occur from immobility or reduced activity, but the core pattern is preserved bowel and bladder function despite progressive motor weakness.