Shoulder anatomy Flashcards
Shoulder is what typ of joint
ball and socket
shoulder is most _____ and least ____ joint
most mobile and least stable
what is the glenoid labrum
fibrocartilage ring attached to the rim of the glenoid fossa, which deepens the cavity.
what is the surgical neck
where the head meets the body
what is the anatomical neck
where the head meets the tubercles.
what is the greater tubercle/ tuberosity and what attaches (2)
large projection lateral to the head. Supraspinatus, infraspinatus attach here.
what is the less tubercle/tuberosity and what attaches
smaller projection on the anterior surface, subscapularis and teres minor attaches here.
where is the deltoid tuberosity and what attaches
lateral side, near the midpoint, deltoid attaches here.
what is the bicipital grove and what does it contain
groove between the tubercles containing the long head of the biceps tendon
what bones make up the shoulder (3)
humerus, scapula, clavicle
anterior deltoid origin
front and top of lateral third of clavivle
anterior deltoid insertion
deltoid tuberosity on outer surface of humeral shaft
anterior deltoid movement
forward flexes and internally rotates humerus
lateral deltoid origin
lateral border of acromion process of scapula
lateral deltoid insertion
deltoid tuberosity on outer surface of humeral shaft
lateral deltoid movement
abducts humerus following initiation of movement by supraspinatus muscle of rotator cuff
posterior deltoid origin
spine of scapula
posterior deltoid insertion
deltoid tuberosity on outer surface of humeral shaft
posterior deltoid movement
extends and externally rotates humerus
pectoralis major originates
along the sternum and clavicle, inserts on the humerus
pec major functions to: (3)
adduct
flex
medially rotate the arm.
trapezius starts at base of ____, runs out to tip of ______ and down to the ___ thoracic vertebrae
Skull
shoulder
12th
what does the trapezius function to do
shrug and square the shoulders
rhomboids are group of two muscles that run _______ from the _____ to the _____ border of the ______
diagonally
from the spine
medial border of the scapula
rhomboids function to
retract the scapula
what gives wing like appearance to the sides
latissimus dorsi
latissimus dorsi starts along the _________ of back and inserts on the _______ aspect of _______
thoracic vertebrae
anterior aspect of the humerous
latissimus dosi functions to
extend , adduct and medially rotate the arm
little helper of the lates
teres major
teres major runs from the _________ to the ___________
axillary boarder of the scapula
lesser tubercle of the humerus
coracobrachialis attaches to the _______ and the arm or ________.
coracoid process
Brachium
choracobrachialis Stabalizes the ______.
humerus in the fossa
rotator cuff muscles (4)
supraspinatus
infraspinatus
teres minor
subscapularis
Supraspinatus- _____ - _____ shoulder. It is ______ to the spine of the scapula. the movement is ______
anterior-superior
superior
abduction
infraspinatus is located _____- ____ shoulder.
_______ to the spine of the scapula.
the movement is_______
posterior-inferior
inferior
external rotation
teres minor is ____ shoulder and functions in what movement
posterior shoulder
functions in adduction
Subscapularis is _______shoulder and functions in what movement
anterior
internal rotation
The four rotator cuff muscles cover ________ and hold the head against the __________.
the humeral head
glenoid fossa
