Table of Muscles

MUSCLE ORIGIN INSERTION ACTION INNERVATION
trapezius superior nuchal line 
of occipital bone
nuchal ligament
spines of 7th &
all thoracic vertebrae
lateral third of clavicle
median margin of acromion
scapular spine
elevates shoulder
laterally rotates scapula
retracts scapula on thoracic wall
spinal accessory n.
latissimus dorsi spinous processes of lower thoracic vertebrae
lumbodorsal fascia
crest of ilium
floor of intertubercular
groove of humerus
adducts, extends, medially rotates arm thoracodorsal n.
rhomboid major spinous processes of 2nd thru
5th thoracic vertebrae
medial border of scapula
below root of scapular spine
retracts and medially rotates scapula dorsal scapular n.
rhomboid minor spine of 7th cervical
and 1st thoracic vertebrae
lower part of nuchal ligament
medial margin of scapula
at the root of the scapular spine
retracts and medially rotates scapula dorsal scapular n.
levator scapulae transverse processes of C1-C4 medial border of scapula
above root of scapular spine
raises scapula dorsal scapular n.
supraspinous supraspinous fossa of scapula superior aspect of
greater tubercle of humerus
abducts the arm (1st 15 degrees) suprascapular n.
infraspinous infraspinous fossa of scapula mid portion of 
greater tubercle of humerus
rotates the arm laterally suprascapular n.
teres minor lateral border of scapula lower aspect of greater tubercle of humerus rotates arm laterally axillary n.
teres major inferior medial border of scapula crest of lesser tubercle of humerus adducts and rotates arm medially lower subscapular n.
deltoid lateral third of clavicle
acromion process
scapular spine
deltoid tuberosity of humerus abduction of arm from 15 degrees to 90 degrees axillary n.
triceps, long head infraglenoid tubercle of scapula olecranon process of ulna extends arm and forearm radial n.


Vessels & Nerves of Posterior Shoulder Structures   Surface Anatomy of Pectoral Region


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