UE: Radius and Ulna

Question 1

What does the head of the radius articulate with?

Answer 1

The capitulum of the humerus.

Question 2

What is the radius?

Answer 2

The radius is a lateral forearm bone, thumb side.

Question 3

_______of the radius allows for pronation and supination of the forearm.

Answer 3

Pivoting of the radius allows for pronation and supination of the forearm.

Question 4

Are the radius and the ulna firmly attached? Why is this important?

Answer 4

The radius and the ulna are not firmly attached. This is important because it allows for pivoting- pronation and supination.

Question 5

Muscles responsible for pronation and supination must insert on the radius.

T/F

Answer 5

True

Question 6

What type of joint is the styloid process?

Answer 6

hinge joint

Question 7

What is the styloid process?

Answer 7

Wrist joitn formed between the carpals and the distal radius.

Question 8

Are the ulna and radius firmly attached?

Answer 8

Yes

Question 9

What is the ulna?

Answer 9

The ulna is a medial forarm bone, pinky side.

Question 10

What is the trochlear notch of the ulna?

Answer 10

Trochlear of radius and trochlear notch of ulna connect together to form a hinge

Allows for rotation

Question 11

Know the structures

Answer 11

Question 12

What is the olceranon process of the ulna?

Answer 12

It fits into the the olecranon fossa when the elbow is flexed.

Question 13

What type of movement does the trochlear notch (where the radius and ulna connect)?

Answer 13

hinge joint

allows for rotation

Question 14

What type of joint does the olecranon process of the ulna have with the humerus?

Answer 14

hinge type joint

Question 15

What type of action does the coronoid process of the ulna allow for?

Answer 15

Flexion and extension

cannot pivot because locked on place

prevents overextension of elbow

Question 16

Radius and ulna are held together by ___________.

Answer 16

Radius and ulna are held together by ligaments.

Helps divide forearm into anterior and posterior muscle compartments.

Question 17

The radius and ulna are totally disconnected.

Answer 17

False-

an interosseous membrane (sheet-like) that hold radius and ulna together.

Question 18

How the radius and ulna positioned relative to each other in supination?

Answer 18

Radius and ulna are paralled to each other in supianation.

Question 19

The radius cannot move and is locked in place.

T/F

Answer 19

Fale

The radius is NOT located into place.

It can pivot around the humerus.

It can pivot across the ulna.