Lecture 8 - Shoulder Girdle & Upper Limb

Question 1

general characteristics of the shoulder girdle

Answer 1

• > responsible for support and articulation of the humerus
• > articulates to thorax posteriorly, laterally and anteriorly
• > medial clavicle articulates to manubrium
• > lateral clavicle articulates to scapula

Question 2

what bone in our body is the first to ossify

Answer 2

clavicle is the first to ossify (5wks) but the last to fuse (20-25 years

Question 3

structures of the clavicle

Answer 3

INFERIOR VIEW
- > sternal end
- > subclavian sulcus/groove
- > conoid tubercle
- > acromial end
SUPERIOR VIEW
- > sternal end
- > acromial end

Question 4

structures of the scapula

Answer 4

ANTERIOR VIEW
- > superior angle
- > inferior angle
- > oblique ridges
- > scapular notch (foramen)
- > coracoid proces
- > clavicular facet
- > acromion process
- > glenoid fossa
POSTERIOR VIEW
- > medial border
- > lateral border
- > supraspinous fossa
- > infraspinous fossa
- > scapular spine
- > acromion process

Question 5

how are upper and lower limbs similar

Answer 5

each vertebrate limb has 3 segments
- > girdle (shoulder/pelvis)
- > proximal segment (humerus/femur)
- > distal (2 segments in humans - ulna/radius and tibia/fibula)

Question 6

anatomical structures of the humerus

Answer 6

ANTERIOR VIEW
- > head
- > lesser tubercle
- > greater tubercle
- > bicipital groove/intertubercular sulcus
- > deltoid tuberosity
- > coronoid fossa
- > tochlea
- > capitulum
POSTERIOR VIEW
- > greater tubercle
- > deltoid tiberosity
- > lateral epicondyle
- > olecranon fossa
- > medial epicondyle
- > trochlea

Question 7

anatomical structures of the radius

Answer 7

POSTERIOR VIEW
- > head
- > radial tuberosity/bicipital tuberosity
- > interosseous crest
- > dorsal tubercle
- > ulnar notch
ANTERIOR VIEW
- > head
- > radial tuberosity/bicipital tuberosity
- > interosseous crest
- > styloid process

Question 8

anatomical structures of the ulna

Answer 8

• > olecranon process
• > trochlear notch
• > radial notch
• > coronoid process
• > interosseous crest
• > radial articulation
• > styloid process