Bones and bony landmarks of the shoulder joint: Scapula and clavicle

Question 1

Which 3 bones make up the shoulder joint?

Answer 1

Scapula (Shoulder blade)

Clavicle (collarbone)

Humerus

Question 2

What bony structure does the costal surface of the scapula face?

Answer 2

Costal (anterior) surface of scapula faces ribs

Question 3

Where is the subscapular fossa, and describe its surface shape and if it is on the costal, lateral or posterior surface of the scapula?

Answer 3

6

Subscapular fossa is large, concave depression

On costal surface of scapula

Question 4

Which rotator cuff muscle originates from the subscapular fossa of scapula?

Answer 4

Subscapularis

Question 5

Where is the coracoid process, and describe its shape and if it is on the costal, lateral or posterior surface of the scapula?

Answer 5

3

Coracoid process is a hook-like projection under acromion process

On costal surface

Question 6

Which 3 muscles originate from the coracoid process?

Answer 6

Short head of biceps brachii (anterior surface)

Pectoralis major (posterior surface)

Coracobrachialis (posterior surface)

Question 7

Where is the glenoid fossa/cavity, describe its shape and what scapular border is it located on?

Answer 7

4

Shallow depression

Superiorly on lateral border

Question 8

What bone does the glenoid fossa of the scapula articulate with, and what joint does this form?

Answer 8

Glenoid fossa of scapula articulates with humeral head to form glenohumeral joint in shoulder

Question 9

Where is the supraglenoid tubercule, and describe its location relative to the glenoid fossa?

Answer 9

1

Supraglenoid tubercule is immediately superior to glenoid fossa on lateral border

Question 10

Where is the infraglenoid tubercule, and describe its location relative to the glenoid fossa?

Answer 10

5

Infraglenoid tubercule is immediately inferior to glenoid fossa on lateral border

Question 11

Which muscles attach to the supraglenoid and infraglenoid fossa of scapula?

Answer 11

Supraglenoid fossa is origin site of long head of biceps brachii

Infraglenoid fossa is origin site of long head of triceps brachii

Question 12

What structure on the posterior surface of scapula divides it into 2 parts?

Answer 12

Spine, which runs horizontally across scapula

Question 13

Where is the acromion process of the scapula, and describe its location relative to the glenohumeral joint?

Answer 13

8

Acromion process is projection of spine that arches over glenohumeral joint

Question 14

What bone does the acromion process of the scapula articulate with, and what joint is this?

Answer 14

Acromion process of scapula articulates with clavicle to produce acromioclavicular joint

Question 15

Where is the infraspinous fossa of the scapula, describe its location relative to the spine and is it on the costal or posterior surface?

Answer 15

9

Infraspinous fossa is on posterior surface of scapula, inferior to spine

Question 16

Where is the supraspinous fossa of the scapula, describe its location relative to the spine and is it on the costal or posterior surface?

Answer 16

7

Supraspinous fossa is on posterior surface of scapula, superior to spine

Question 17

Which muscles originate from the supraspinous and infraspinous fossa of scapula?

Answer 17

Supraspinous fossa is the origin of supraspinatus

Infraspinous fossa is the origin of infraspinatus