The Joy of Learning about Cranial Nerves!

Which muscles in the neck are innervated by Cranial Nerve XI (Spinal Accessory)?

A) sternomastoid and trapezius.
B) spinal accessory and omohyoid.
C) trapezius and sternomandibular.
D) sternomandibular and spinal accessory.

Answer:

The Spinal Accessory (Cranial Nerve XI) innervates the sternomastoid and trapezius muscles in the neck.

Let's Dive into the World of Cranial Nerves!

Learning about Cranial Nerves can be both fascinating and rewarding. Cranial Nerve XI, also known as the Spinal Accessory Nerve, plays a crucial role in innervating specific muscles in the neck.

The correct answer to the question is that the Spinal Accessory Nerve innervates the sternomastoid and trapezius muscles. These muscles are essential for various movements such as rotation of the head, flexion of the head, and stabilizing the shoulder blades.

When examining a patient's cranial nerve function, understanding which muscles are innervated by specific cranial nerves like the Spinal Accessory Nerve is essential for proper assessment.

So, let's continue exploring the wonders of anatomy and physiology, and dive deeper into the intricate world of cranial nerves!