Brachial Plexus Flashcards
What structures are innervated by the dorsal scapular nerve
Rhomboids
What structures are innervated by the Long thoracic
serratus anterior
What structures are innervated by the suprascapular
supraspinatus and infraspinatus muscles
glenohumoral joint
What structures are innervated by the Subclavian nerve
subclavius and sternoclavicular joint
What structures are innervated by the lateral pectoral
primarily pectoralis major
What structures are innervated by the musculocutaneous
muscles of anterior compartment of the arm
- coracohrachialis
- biceps brachii
- brachialis
skin of lateral arm
What structures are innervated by the median nerve
- muscle of anterior fore arm compartment (except for flexor carpi ulnaris and ulnar half of flexor digitorum profundous)
- five intrinisc muscles in thenar half of palm
- palmar skin
What structures are innervated by the medial pectoral nerve
percoralis minor
sternocostal part of pectoralis major
What structures are innervated by the medial cutaneous nerve of arm
skin of medial side of arm, as far distal as medial epicondyle of humerus and olecranon of ulna
What structures are innervated by the median cutaneous nerve of forearm
skin of medial side of forearm as far distal as the wrist
What structures are innervated by the ulnar nerve
flexor carpi ulnaris and ulnar half of flexor digitorum profundus (for arm)
most intrinisc muscles of hand
skin of hand medial to axial line of digit 4
What structures are innervated by the upper suubscapular nerve
superior portion of subscapularis
What structures are innervated by the lower subscapular
inferior portion of subscapularis and teres major
What structures are innervated by the thoracodorsal nerve
latissimus dorsi
What structures are innervated by the axillary nerve
glenohumeral joint
teres minor and deltoid muscles
skin of superolateral arm
What structures are innervated by the radial nerve
All muscles of posterior compartments of arm and forearm
skin of posterior and inferolateral arm, posterior forarm and dorsum of hand lateral to axial line of digit 4
What is the origin of the dorsal scapular nerve
posterior aspect of anterior ramus of C5 with a frequent contribution from C4
What is the origin of the long thoracic nerve
Posterior aspect of anterior rami of C5, C6, and C7
What is the origin of the supra scapular nerve
Superior trunk, receiving fibers from C5, C6, C7 and often C4
What is the origin of the Subclavian Nerve
Superior trunk, receiving input from C5, C6 and often C4
What is the origin of the Lateral pectoral nerve
Side branch of lateral cord, Receiving fibers from C5, C6, and C7
What is the origin of the musculocutaneous nerve
Terminal branch of lateral cord, receiving fibers from C5-C7
What is the origin of the Median nerve
Lateral root of median nerve is a terminal branch of lateral of lateral cord (C6, C7)
Medial root of median nerve is a terminal branch of medial cord (C8, T1)
What is the origin of the Medial Pectoral Nerve
Side branches of of medial cord, receiving fibers from C8, T1
What is the origin of the Medial cutaneous nerve of arm
Side branches of of medial cord, receiving fibers from C8, T1
What is the origin of the Median cutaneous nerve of forearm
Side branches of of medial cord, receiving fibers from C8, T1
What is the origin of the Ulnar nerve
Larger terminal branch of medial cord, receiving fibers from C8, T1 and often C7
What is the origin of the Upper sub scapular nerve
Side branch of posterior cord, receiving fibers from C5
What is the origin of the lower subscapular
side branch of posterior cord receiving fibers from C6
What is the origin of the throracodorsal nerve
side branch of posterior cord, receiving fibers from C6, C7, C8
What is the origin of the axillary nerve
Terminal branch of posterior cord, receiving fibers from C5, C6
What is the origin of the Radial Nerve
Larger terminal branch of posterior cord (Largest branch of plexus) receiving fibers from C5-T1
