Muscles of Forearm Flashcards

1
Q

What is the origin insertion and action for pronator teres

A

Origin - medial epicondyle of humerus + coronoid process of ulna
Insertion - middle of lateral surface of radius
Action - pronates forearm and assists elbow flexion

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2
Q

What is the origin insertion and action for pronator quadratus

A

Origin - distal part of anterior surface of shaft of ulna
Insertion - distal part of anterior surface of shaft of radius
Action - pronates forearm and stabilises the bones (inf RU jt) in weight bearing

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3
Q

What are muscles are in the anterior compartment

A

Pronator teres

Pronator quadratus

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4
Q

What muscles are in the posterior compartment

A

Brachioradialis

Supinator

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5
Q

What is the origin insertion and action for brachioradialis

A

Origin - lateral supracondylar ridge of humerus
Insertion - lateral surface of radius above the styloid process
Action - flexes elbow when forearm is mid prone, returns forearm from full supination or full pronation to mid range

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6
Q

What is the origin insertion and action for supinator

A

Origin - Lateral epicondyle of humerus, radial collateral and annular ligaments, supinator fossa and crest of ulna
Insertion - lateral posterior and anterior surfaces of proximal 1/3 of radius
Action - supinates forearm

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