Posterior cord
Encyclopedia
The posterior cord is a part of the brachial plexus
. It consists of contributions from all of the roots of the brachial plexus.
The posterior cord gives rise to the following nerves:
Brachial plexus
The brachial plexus is a network of nerve fibers, running from the spine, formed by the ventral rami of the lower four cervical and first thoracic nerve roots...
. It consists of contributions from all of the roots of the brachial plexus.
The posterior cord gives rise to the following nerves:
| Name | Roots | Supplies >- | upper subscapular nerve Upper subscapular nerve The upper subscapular enters the upper part of the Subscapularis, and is frequently represented by two branches. It is derived from C5, C6 nerve fibers, and branches from the posterior cord of the brachial plexus.... |
C5-C6 | rotator cuff Rotator cuff In anatomy, the rotator cuff is the group of muscles and their tendons that act to stabilize the shoulder. The four muscles of the rotator cuff, along with the teres major muscle, the coracobrachialis muscle and the deltoid, make up the seven scapulohumeral muscles of the human body.-Function:The... >- | lower subscapular nerve Lower subscapular nerve The lower subscapular nerve is a nerve that supplies the lower part of the subscapularis muscle, and also supplies the teres major muscle.... |
C5-C6 | >- | C6-C8 | >- | C5-C6 | shoulder Shoulder The human shoulder is made up of three bones: the clavicle , the scapula , and the humerus as well as associated muscles, ligaments and tendons. The articulations between the bones of the shoulder make up the shoulder joints. The major joint of the shoulder is the glenohumeral joint, which... and motor to the deltoid Deltoid Deltoid can refer to:* The deltoid muscle, a muscle in the shoulder* Kite , also known as a deltoid, a type of quadrilateral* A deltoid curve, a three-sided hypocycloid* A leaf shape* The deltoid tuberosity, a part of the humerus... muscle, the teres minor and the triceps brachii (long head) muscle >- | radial nerve Radial nerve The radial nerve is a nerve in the human body that supplies the upper limb. It supplies the medial and lateral heads of the triceps brachii muscle of the arm, as well as all 12 muscles in the posterior osteofascial compartment of the forearm and the associated joints and overlying skin.It... |
C5-C8, T1 | triceps brachii muscle, the brachioradialis Brachioradialis Brachioradialis is a muscle of the forearm that acts to flex the forearm at the elbow. It is also capable of both pronation and supination, depending on the position of the forearm... muscle, the extensor muscles of the fingers and wrist (extensor carpi radialis Extensor carpi radialis Extensor carpi radialis can refer to:* Extensor carpi radialis brevis muscle* Extensor carpi radialis longus muscle... muscle), supinator, and the extensor and abductor muscles of the thumb |