The Elbow

Question 1

what is the radial falsa

Answer 1

shallow depression on inferior humerus

Question 2

what is the coronoid falsa

Answer 2

medial inferior aspect of humerus

Question 3

what muscles flex the elbow

Answer 3

• long head of biceps brachii
• short head of biceps brachii
• brachialis
• brachioradialis

Question 4

where does the long head of biceps brachii originate and insert

Answer 4

• origin: supraglenoid tubercle of scapula
• insertion: radial tuberosity and antebrachial fascia

Question 5

where does the short head of biceps brachii originate and insert

Answer 5

• origin: apex of coracoid process of scapula
• insertion: radial tuberosity and antebrachial fascia

Question 6

where does the brachialis originate and insert

Answer 6

• origin: anterior aspect of distal half of humerus
• insertion: coronoid process and tuberosity of ulna

Question 7

where does the brachioradialis originate and insert

Answer 7

• origin: superior two thirds of lateral supracondylar ridge of humerus
• insertion: lateral aspect of distal part of radius

Question 8

what muscles extend the elbow

Answer 8

• long head of triceps brachii
• short head of triceps brachii
• anconeus

Question 9

where does the long head of triceps brachii originate and insert

Answer 9

• origin: infraglenoid tubercle of scapula
• insertion: olecranon of ulna and adjacent antebrachial fascia

Question 10

where does the short head of triceps brachii originate and insert

Answer 10

• origin: posterior surface of humerus, superior to radial groove
• insertion: olecranon of ulna and adjacent antebrachial fascia

Question 11

where does the anconeus originate and insert

Answer 11

• origin: posterior aspect of lateral epicondyle of humerus
• insertion: olecranon; proximal end of body of ulna

Question 12

what muscles pronate the elbow

Answer 12

• pronator quadratus
• pronator teres

Question 13

where does the pronator quadratus originate and insert

Answer 13

• origin: anterior aspect of distal one quarter of ulna
• insertion: anterior aspect of distal one quarter of radius

Question 14

where does the pronator teres originate and insert

Answer 14

• origin: medial supracondylar ridge of humerus via the common flexor tendon and medial aspect of coronoid process of ulna
• insertion: middle one third of anterolateral aspect of radius

Question 15

what muscle supinate the elbow

Answer 15

• long head of biceps brachii
• short head of biceps brachii
• supinator

Question 16

where does the supinator originate and insert

Answer 16

• origin: lateral epicondyle of humerus, supinator crest and supinator fossa of ulna
• insertion: anterior, lateral, and posterior aspects of proximal one third of radius