What Innervates the trapezius muscle?

Cranial nerve XI innervates the motor function of the trapezius. The function of the trapezius is to stabilize and move the scapula. The upper fibers can elevate and upwardly rotate the scapula and extend the neck.

What nerve provides motor innervation to the trapezius?

The accessory nerve
The accessory nerve provides the main motor input to the trapezius muscle, but preservation of the C2-C4 branches to the muscle during modified neck dissection should improve outcomes.

Where does the trapezius obtain its innervation from?

cranial nerve XI
It is a large, strong muscle that is innervated by the accessory nerve (cranial nerve XI). In addition to its innervation from the accessory nerve, the trapezius muscle receives some proprioceptive fibers from the third and fourth cervical ventral rami.

What artery supplies the trapezius?

It was found that there are two main patterns of vascular supply to the trapezius, and that the muscle is principally supplied by three vascular sources: the transverse cervical artery, the dorsal scapular artery, and the posterior intercostal arterial branches.

Which cranial nerve innervates the trapezius and sternocleidomastoid?

the XI nerve
The muscles innervated directly by the XI nerve are the trapezius and the sternocleidomastoid, in addition to the laryngeal musculature (in collaboration with the vagus nerve), such as the palatal, pharyngeal, laryngeal muscles.

Which cranial nerve innervates the sternocleidomastoid and trapezius quizlet?

Which cranial nerve innervates the sternocleidomastoid and trapezius muscles? The spinal accessory nerve is a motor nerve that innervates the sternocleidomastoid and trapezius muscles.

What does thoracodorsal nerve supply?

The thoracodorsal nerve carries solely motor fibers. Its main function is to innervate the latissimus dorsi muscle. When it reaches the muscle, the thoracodorsal nerve gives off several small terminal branches that reach the margins of the muscle and supply the whole muscle.

What Innervates the levator scapulae?

The levator scapulae muscle is innervated by contributions from C3 and C4 rami. The nerves emerge from beneath the posterior border of the sternocleidomastoid to travel caudally into the posterior cervical triangle.

What nerve innervates the levator scapulae?

The DSN is a motor nerve that innervates the levator scapulae, rhomboid major, and rhomboid minor muscles. These muscles work dynamically and collectively are considered periscapular stabilizing muscles. Individually they can retract and elevate the scapula.

What muscles are innervated by C1 C3?

Motor. On the other hand, the motor branches of the cervical plexus form the ansa cervicalis (C1-C3), which is a nerve loop innervating the infrahyoid muscles in the anterior cervical triangle. They also form the phrenic nerve (C3-C5) which supplies the diaphragm and the pericardium of the heart.