Question

Does spinal muscular atrophy damage upper or lower motoneurons?
1) Upper
2) Lower

Answer 1

In spinal muscular atrophy, the lower motor neurons are primarily affected.

Step-by-step explanation:

In spinal muscular atrophy, the lower motor neurons are primarily affected. The disease causes the progressive degeneration of the lower motor neurons in the spinal cord, leading to muscle weakness and atrophy.