Pectoral Region Flashcards
consist of clavicle & scapula which articulate with one another at the ______
acromioclavicular joint
long, slender bone that lies horizontally across the root of the neck just beneath the skin
articulates with the sternum and
1st costal cartilage medially and
with the acromion process of the
scapula laterally
• medial 2/3 is convex forward and
its lateral 1/3 is concave forward
clavicle
flat triangular bone that lies
on the posterior chest wall
between the 2nd and 7th ribs
scapula
- articulates with the clavicle at
the lateral end of the spine
acromion
projects backward
Scapular spine
situated above and below the
scapular spine
Supraspinous & Infraspinous
fossa
projects upward and
forward above the glenoid
cavity
- provides attachment for
muscles and ligaments
Coracoid Process
concave and shallow
Subscapular Fossa
articulates with the head
of the humerus at the
shoulder joint at the
superolateral angle of the
scapula; pear-shaped
Glenoid Cavity / Fossa
medial to the base of the
coracoid process
Suprascapular Notch
Pectoralis major
origin
insertion
Clavicle, sternum,
and upper six
costal cartilages
Lateral lip of bicipital groove of humerus
Pectoralis minor
origin
insertion
3rd, 4th, and
5th ribs
Coracoid process of scapula
Subclavius
origin
insertion
1st costal cartilage
Clavicle
Serratus anterior
origin
insertion
Upper eight ribs
Medial border and inferior angle of scapula
Trapezius
origin
insertion
Occipital bone, ligamentum nuchae, spine of 7th cervical vertebra, spines of all thoracic vertebrae
Upper fibers into lateral third of clavicle; middle and lower fibers into acromion and spine of scapula
Latissimus dorsi
origin
insertion
Iliac crest, lumbar fascia, spines of lower six thoracic vertebrae, lower three or four ribs, and inferior angle of scapula
Floor of bicipital groove of humerus
Rotator Cuff Muscles
Supraspinatus
Infraspinatus
Subscapularis
Teres minor
Levator scapulae
o
i
Transverse processes of 1st four cervical vertebrae
Medial border of scapula
Rhomboid minor
o
i
Ligamentum nuchae and spines of 7th cervical and 1st thoracic vertebrae
Medial border of scapula
Rhomboid major
o
i
Second to 5th thoracic
spines
Medial border of scapula
deltoid
o
i
Lateral third of clavicle, acromion, spine of scapula
Middle of lateral surface of shaft of humerus
Supraspinatus
o
i
Supraspinous fossa of scapula
Greater tuberosity of humerus; capsule of shoulder joint
Infraspinatus
o
i
Infraspinous fossa of scapula
Greater tuberosity of humerus; capsule of shoulder joint
Teres major
o
i
Lower third of lateral border of scapula
Medial lip of bicipital groove of humerus
Teres minor
o
i
Upper two thirds of lateral border of scapula
Greater tuberosity of humerus; capsule of shoulder joint
Subscapularis
o
i
Subscapular fossa
Lesser tuberosity of humerus
