human skeleton quiz 5

What is the largest bone in the upper limb?

Humerus

How many primary ossification centers are there on the humerus?

one (diaphysis)

How many secondary ossification centers are there on the humerus?

7 (3 proximal, 4 distal)

What degree is humeral torsion?

145 degrees

Locate the greater tubercle of the humerus

What muscle(s) attach at the greater tubercle of the humerus?

Supraspinatus

Infraspinatus

Teres minor

Locate the lesser tubercle of the humerus

What muscle(s) attach at the lesser tubercle of the humerus?

Subscapularis

Locate the intertubercular groove of the humerus

What direction does the nutrient foramen of the humerus towards?

The elbow

Locate the deltoid tuberosity of the humerus

What muscle(s) attach at the deltoid tuberosity of the humerus?

Deltoid

Locate the capitulum of the humerus

Locate the trochlea of the humerus

Locate the radial fossa of the humerus

Locate the medial epicondyle of the humerus

Locate the lateral epicondyle of the humerus

What feature of the humerus is responsible for flexion and pronation of the forearm?

Medial epicondyle

What feature of the humerus is responsible for extension and supination of the forearm?

Lateral epicondyle

What bone is the shortest of the long bones in the arm?

Radius

Locate the radial head of the radius

Locate the radial tuberosity of the radius

Locate the shaft of the radius

Locate the radial neck of the radius

Locate the nutrient foramen of the radius

Locate the interosseous crest of the radius

Locate the ulnar notch of the radius

Locate the radial styloid process of the radius

Locate the groove for extensor tendons of the radius

Locate the lunate carpal surface of the radius

Locate the scaphoid carpal surface of the radius

Locate the olecranon process of the ulna

Locate the trochlear notch of the ulna

Locate the radial notch of the ulna

Locate the coronoid process of the ulna

Locate the ulnar tuberosity of the ulna

Locate the nutrient foramen of the ulna

Locate the interosseous crest of the ulna

Locate the pronator ridge of the ulna

Locate the ulnar head of the ulna

Locate the ulnar styloid process of the ulna

Locate the extensor carpi ulnaris groove of the ulna

What kind of joint is the elbow joint?

Saddle joint

What are the pronator muscles?

Pronator teres muscle

Pronator quadratus

What are the supinator muscles?

Supinator muscle

Biceps brachii muscle

What is the function of the medial epicondyle?

Flexion of the wrist

What is the function of the lateral epicondyle?

Extension of wrist

How many bones are in the wrist and the hand?

27 bones

How many bones are in the carpus or the wrist?

8 bones

How many bones are in the hand or the manus?

19 bones

How many rays are in each hand?

5 rays

What does each ray consist of?

metacarpal

3 phalanges (proximal, middle, distal)

How many phalanges does the thumb have?

2 (proximal and distal)

What carpal bones articulate with the radius?

Scaphoid

Lunate

What carpals articulate with the metacarpals?

Trapezium (MC 1 & 2)

Trapezoid (MC 2)

Capitate (MC 2 & 3)

Hamate (MC 4 & 5)

Which carpal is the most lateral?

Scaphoid

Where does the scaphoid articulate?

With the radius on the radial facet on the proximal side

Locate the scaphoid tubercle

Locate the facet for the head of the capitate

Locate the radial facet

Locate the scaphoid

Locate the lunate

Locate the radial facet of the lunate

Locate the facet for the head of the capitate on the lunate

Locate the triquetral

Locate the pisiform

Locate the trapezium

Locate the trapezial ridge of the trapezium

Locate the trapezoid

Locate the capitate

Locate the head of the capitate

Locate the hamate

Locate the hamulus

What bones anchor the flexor retinaculum?

Scaphoid

Pisiform

Trapezium

Hamate

What ligament band forms the carpal tunnel?

Flexor retinaculum

What is the funny bone?

Cubital tunnel syndrome (ulnar nerve at the elbow)

What carpals are in the distal row?

Trapezium

Trapezoid

Capitate

Hamate

What metacarpal(s) articulate with the trapezoid?

MC 1

What carpal(s) articulate with MC 2?

Trapezium

Trapezoid

Capitate

What carpal(s) articulate with MC 3?

Capitate

What carpal(s) articulate with MC 4?

Hamate

What carpal(s) articulate with MC 5?

Hamate

How many ossification centers do MC 2-5 have?

2 centers for ossification