10. Posterior Shoulder Flashcards
(48 cards)
The medial part of the clavicle is called _ while the lateral end is called _
sternal facet
acromial end
The _ is the area where the deltoid muscle attaches
deltoid tubercle
T/F The lateral edge of the scapula is called the medial border
False (called the axillary border)
Name the 2 fossa on the posterior border of shoulder
supraspinous fossa
infraspinous fossa
The insertion point of the pectoralis minor is on the _
coracoid process
The lesser tubercle of the humerus is _ to the intertubercular groove
medial
The point of insertion for the deltoid is the _
deltoid tuberosity
The _ is also considered the funny bone
medial epicondyle
The fossa on the posterior part of the humerus is the _
olecranon fossa
The innervations of shoulder muscles are typically _ to the muscle
deep
The 3 origin points for the deltoid muscle are _
Clavicle
spine of scapula
acromion
The 3 actions of the deltoid are to _
flex/medially rotate
abduct humerus
extend/laterally rotate
The _ and _ are innervated by the axillary nerve
deltoid and teres minor
What is the origin of the supraspinatus muscle?
supraspinous fossa
The supraspinatus inserts onto the _
greater tubercle
What are the 2 actions of the supraspinatus?
Stabilize shoulder
Abducts humerus
The _ is the primary abductor of the arm until around 15 degrees, then the _ takes over
Supraspinatus
Deltoid
T/F The supraspinatus is innervated by the infrascapular nerve
False (suprascapular nerve)
Name the origin and insertion of the infraspinatus muscle
Infraspinous fossa
greater tubercle
Name the 2 actions of the infraspinatus
stabilize shoulder
laterally rotate humerus
The suprascapular nerve innervates _ and _
Supraspinatus
Infraspinatus
Teres minor inserts on the _
greater tubercle
What is the origin of the teres minor?
Dorsal axillary border
What are the 2 actions of teres minor?
Stabilize shoulder
Laterally rotate humerus
