Upper Extremity Joints and Muscles (Antebrachium)

Question 1

Humeroulnar Joint

Answer 1

Articulating bones: humerus and raise, humerus and ulna
Joint type: hinge
Movement: gliding

Question 2

Humeroradial Joint

Answer 2

Articulating bones: humerus and radius
Joint type: ball and socket
Movement: flexion, extension, pronation, supination

Question 3

Proximal Radioulnar Joint

Answer 3

Articulating bones: radius and ulna
Joint type: pivot
Movement: pronation and supination

Question 4

Biceps Brachii

Answer 4

Actions: flexion of forearm at humeroulnar/humeroradial joint; supination of forearm

Question 5

Brachialis

Answer 5

Action: flexion of forearm at humeroulnar/humeroradial joint

Question 6

Brachioradialis

Answer 6

Action: flexion of forearm at humeroulnar/humeroradial joint, returns pronation/supination to anatomical position

Question 7

Triceps Brachii

Answer 7

Action: extension of forearm at humeroulnar/humeroradial joint

Question 8

Supination

Answer 8

Lateral epicondyle of humerus to radial tuberosity

Action: supination of forearm at radoiocarpal joint

Question 9

Pronator Teres

Answer 9

Proximal, medial epicondyle of humerus to lateral radius

Action: pronation of forearm at radiocarpal joint

Question 10

Pronator Quadratus

Answer 10

sweatband muscle

Action: pronation of forearm at radoiocarpal joint

Question 11

Anconeus

Answer 11

Lateral epicondyle of humerus

Action: extends elbow joint