Muscles of Neck, Shoulder, Thorax (O/I/A) Flashcards
Trapezius
O: Occipital Bone
I: Acromion/spine of scapula
A: Stabilize, elevate, retract, rotate scapula
Latissimus dorsi
O: Lower 6 thoracic vertebrae
I: Intertubercular sulcus of Humerus
A: Extension, adduction, medial rotation of arm
Infraspinatus
O: Infraspinous fossa of scapula
I: Greater tubercle of Humerus
A: Laterally rotate arm
Teres minor
O: Dorsal scapular surface
I: Greater tubercle of Humerus
A: Laterally rotate arm
Teres major
O: Posterior scapula
I: Crest of lesser tubercle
A: Extend, medially rotate, adduct arm
Supraspinatus
O: Supraspinous fossa of the scapula
I: Greater tubercle of humerus
A: Initiate abduction of arm
Levator Scapulae
O: Transverse process of C1-4
I: Medial border of scapula
A: Elevate adduct scapula
Rhomboids
O: Spinous process of C7/T1 (minor) and T2-5 (major)
I: Medial border of scapula
A: Stabilize scapula
Clavotrapezius
O: Occipital bone and spine of cervical vertebrae
I: Clavicle
A: Pull clavicle upward
Acromiotrapezius
O: Spines of cervical and thoracic vertebrae
I: Spine and acromion of scapula
A: Pull scapula upward
Spinotrapezius
O: Spine of Thoracic vertebrae
I: Spine of scapula
A: Pulls scapula upward and back
Clavodeltoid
O: Clavicle
I: Semilunar notch of Ulna
A: Flexes forelimb
Acromiodeltoid
O: Acromion of scapula
I: Proximal end of humerus
A: Flexes and rotates limb
Spinodeltoid
O: Spine of scapula
I: Proximal end of humerus
A: Flexes and rotates limb
Rhomboid capitis
O: Occipital bone of skull
I: Medial border of scapula
A: Pulls scapula foreward
