Which of these muscles have motor units with the highest innervation ratio?

Question

Quizplus · Accepted Answer

Muscles that move the fingers have the highest innervation ratio as they require fine motor control and precision. The muscles of the fingers have small muscle fibers and many muscle fibers are innervated by a single motor neuron, resulting in a high innervation ratio. In contrast, muscles of the leg and trunk have larger muscle fibers and fewer muscle fibers are innervated by a single motor neuron, resulting in a lower innervation ratio.

Which of These Muscles Have Motor Units with the Highest