Shoulder Muscle Innervations Flashcards
1
Q
Deltoid
A
Axillary C5, 6
2
Q
Trapezius
A
Spinal portion of cranial nerve XI; Ventral ramus C2, 3, 4
3
Q
Latissimus dorsi
A
Thoracodorsal C6, 7, 8
4
Q
Teres major
A
Lower subscapular C5, 6, 7
5
Q
Infraspinatus
A
Suprascapular C4, 5, 6
6
Q
Subscapularis
A
Upper and lower subscapular C5, 6, 7
7
Q
Supraspinatus
A
Suprascapular C4, 5, 6
8
Q
Teres minor
A
Axillary C5, 6
9
Q
Levator Scapula
A
Cervical 3, 4 and dorsal scapular C4, 5
10
Q
Sternalis
A
Internal thoracic nerve (55%); intercostal nerve (43%); both nerves in remaining cases
11
Q
Pectoralis major (upper fibers)
A
lateral pectoral C5, 6, 7
12
Q
Pectoralis major (lower fibers)
A
lateral and medial pectoral C6, 7, 8, T1
13
Q
Subclavius
A
subclavian C5, 6
14
Q
Biceps brachii
A
musculocutaneous C5, 6
15
Q
Triceps brachii
A
radial C6, 7, 8, T1
