What is the innervation of levator scapulae?
The levator scapulae is innervated by cervical nerve (C3-C4) and dorsal scapular nerve (C5).
What is the action and innervation of the levator scapulae?
| Levator scapulae muscle | |
|---|---|
| Artery | dorsal scapular artery |
| Nerve | cervical nerve (C3, C4) and dorsal scapular nerve (C5) |
| Actions | Elevates scapula and tilts its glenoid cavity inferiorly by downwardly rotating the scapula |
| Identifiers |
What does levator scapula do?
The levator scapulae muscles are superficial extrinsic muscles of the back that primarily function to elevate the scapulae.
What nerve innervates the levator scapulae and the rhomboids?
The dorsal scapular nerve (C5) supplies the levator scapulae and rhomboid muscles; it aids in elevation and adduction of the scapula toward the spinal column.
What Innervates the teres major?
The subscapular nerve from C5 to C6 roots innervates the teres major muscle. The anterior thoracic nerve from the C5 to C8 roots innervates the pectoralis major and minor, and the thoracodorsal nerve from C6 to C8 roots innervates the latissimus dorsi muscle.
What is the trapezius innervated by?
Cranial nerve XI
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 does the dorsal scapular nerve innervate?
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 Innervates rhomboid major?
The rhomboids are important in upper limb movement and stability of both the shoulder girdle and scapula. Both rhomboids receive innervation from the dorsal scapular nerve and supplied by the dorsal scapular artery.
What nerve innervates the trapezius muscle?
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.
What nerve Innervates the scapula?
dorsal scapular nerve
The dorsal scapular nerve comes directly and laterally off of the C5 nerve root and innervates the levator scapula, rhomboid major, and minor rhomboid muscles. The long thoracic nerve, coming from roots C5 through C7, innervates the serratus anterior muscle.
What nerve Innervates the shoulder blade?
The dorsal scapular nerve provides motor innervation to the rhomboid muscles, which pull the scapula medially towards the vertebral column, and levator scapulae muscle, which elevates the scapula.
Does infraspinatus abduct?
Infraspinatus is the main external rotator of the shoulder joint. It assists in producing shoulder extension. With the arm fixed, it abducts the inferior angle of the scapula.
What kind of innervation does the levator scapulae have?
The levator scapulae is innervated by the third through fifth cervical nerves (C3-C5). The fifth cervical nerve is also known as the dorsal scapular nerve. Innervation means that the levator scapulae receives electrical signals from the brain through these nerves.
Is the levator scapulae part of the trapezius muscle?
Levator scapulae is a posterior Axio-appenducular muscle that connects the upper limb to the vertebral column and lies in the posterior triangle of the neck. The superior aspect of the levator scapulae is covered by sternocleidomastoid, and its inferior part by trapezius. [1]
What are the symptoms of paralysis of the levator scapulae?
An isolated lesion of the dorsal scapular nerve with a consequent paralysis of the levator scapulae muscle is very rare. The symptoms include a “winging” of the scapula (scapula alata) as well as an atrophy of both the levator scapulae and rhomboid muscles.
What is the function of the dorsal scapular nerve?
The dorsal scapular nerve (C5) supplies the levator scapulae and rhomboid muscles; it aids in elevation and adduction of the scapula toward the spinal column. A nerve lesion leads to lateral displacement of the vertebral border of the scapula and to rhomboid atrophy (difficult to detect).