Elbow Actions

Question 1

Elbow Flexors

Answer 1

BICEPS BRACHII (long head)

O: supraglenoid tubercle of scapula

I: radial tuberosity

BICEPS BRACHII (short head)

O: coracoid process

I: radial tuberosity

BRACHIALIS

O: distal anterior humerus

I: coronoid process of ulna

BRACHIORADIALIS

O: lateral supracondylar ridge of humerus

I: styloid process of radius

PRONATOR TERES

O: medial epicondyle and medial coronoid process

I: lateral shaft of radius

Question 2

ELBOW EXTENSORS

Answer 2

TRICEPS BRACHII (long head)

O: infraglenoid tubercle of scapula

I: olecranon process

TRICEPS BRACHII (lateral head)

O: superior posterior humerus

I: olecranon process

TRICEPS BRACHII (medial head)

O: inferior posterior humerus

I: olecranon

ANCONEUS

O: posterolateral epicondyle of humerus

I: lateral olecranon

Question 3

FOREARM SUPINATORS

Answer 3

BICEPS BRACHII (long head)

O: supraglenoid tubercle of scapula

I: radial tuberosity

BICEPS BRACHII (short head)

O: coracoid process

I: radial tuberosity

BRACHIORADIALIS

O: lateral supracondylar ridge of humerus

I: styloid process of radius

SUPINATOR

O: lateral epicondyle of humerus, shaft of ulna

I: shaft of radius

Question 4

ELBOW PRONATORS

Answer 4

PRONATOR QUADRATUS

O: distal shaft of ulna

I: distal shaft of radius

PRONATOR TERES

O: medial epicondyle and medial coronoid process

I: lateral shaft of radius

Question 5

Which muscles that flex/extend the elbow also flex/extend the shoulder?

Answer 5

BICEPS BRACHII (long head)

O: supraglenoid tubercle of scapula

I: radial tuberosity

A: elbow flexion, forearm supination, shoulder flexion

TRICEPS BRACHII (long head)

O: infraglenoid tubercle of scapula

I: olecranon process

A: elbow extension, shoulder extension/hyperextension