Is the dorsal scapular nerve Part of the brachial plexus?
Is the dorsal scapular nerve Part of the brachial plexus?
The dorsal scapular nerve is a branch from the C5 root of the brachial plexus and supplies the rhomboid muscles.
What is the nerve root of dorsal scapular nerve in the brachial plexus?
The dorsal scapular nerve is one of the lateral branches of the brachial plexus, arising from its root, specifically from the root of spinal nerve C5….Dorsal scapular nerve.
| Origin | Anterior ramus of spinal nerve C5 |
|---|---|
| Branches | None |
| Supply | Rhomboid major, rhomboid minor and levator scapulae muscle |
What does 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 does the dorsal scapular nerve pierces?
The dorsal scapular nerve pierces the middle scalene muscle and travels posteriorly between the posterior scalene and serratus posterior superior and levator scapulae muscles to innervate the rhomboid major and minor muscles and, occasionally, the levator scapulae muscle (Figure 43.5).
What is the brachial plexus?
The brachial plexus is a network of nerves in the shoulder that carries movement and sensory signals from the spinal cord to the arms and hands. Brachial plexus injuries typically stem from trauma to the neck, and can cause pain, weakness and numbness in the arm and hand.
Which of the following muscles is innervated by the dorsal scapular nerve of the brachial plexus?
The dorsal scapular nerve innervates rhomboideus major, rhomboideus minor, and levator scapulae.
What is the brachial plexus nerve?
Which nerves make up the brachial plexus?
The brachial plexus is a network (plexus) of nerves (formed by the anterior rami of the lower four cervical nerves and first thoracic nerve (C5, C6, C7, C8, and T1). This plexus extends from the spinal cord, through the cervicoaxillary canal in the neck, over the first rib, and into the armpit.
Where does the brachial plexus originate?
How is the brachial plexus formed?
The brachial plexus is formed by the anterior primary rami of C5 through T1 and provides sensory and motor innervation of the upper extremity. The brachial plexus is divided, proximally to distally into rami/roots, trunks, divisions, cords, and terminal branches.
Which of the following is innervated by the dorsal scapular nerve quizlet?
How do the dorsal scapular and long thoracic nerves branch?
The dorsal scapular and long thoracic nerves course through the neck, where they may become entrapped between or within adjacent scalene muscles. Additionally, a high frequency of brachial plexus “piercing” variants have recently been documented, and it is unclear how they influence branching patterns distally along the brachial plexus.
What nerve causes winging of the scapula?
Dorsal scapular nerve syndrome can cause a winged scapula, with pain and limited motion. The dorsal scapular nerve arises from the brachial plexus, usually from the plexus root ( anterior/ventral ramus) of the cervical nerve C5. Once the nerve leaves C5 it commonly pierces the middle scalene muscle.
Which nerves are involved in root and plexus lesions of the scapula?
1. Dorsal scapular nerve, from C5 to rhomboid and levator scapula muscles; responsible for elevation and stabilization of the scapula. 2. Long thoracic nerve, from C5, C6, C7 to serratus anterior; responsible for abduction of the scapula. Testing these nerves is useful in differentiating between root and plexus lesions.
How common is dorsal scapular nerve injury?
Isolated dorsal scapular nerve injury is uncommon, but case reports usually involve injury to the scalene muscles. Dorsal scapular nerve syndrome can be caused by nerve compression syndrome. A winged scapula is the most common symptom.