Spinal Nerves from the Sacral Region of the Cord Innervate

Question

Spinal nerves from the sacral region of the cord innervate the ________ muscles.
A) shoulder
B) intercostal
C) abdominal
D) leg
E) facial

Accepted Answer

The sacral region of the spinal cord innervates the muscles of the legs, including the gluteal muscles, quadriceps, and hamstrings. Choice A is incorrect because shoulder muscles are innervated by spinal nerves from the cervical and brachial regions of the cord. Choice B is incorrect because intercostal muscles are innervated by spinal nerves from the thoracic region of the cord. Choice C is incorrect because abdominal muscles are innervated by spinal nerves from the thoracic and lumbar regions of the cord. Choice E is incorrect because facial muscles are innervated by cranial nerves, not spinal nerves.