Podcast
Questions and Answers
The _____ teres originates from the coronoid process.
The _____ teres originates from the coronoid process.
pronator
The flexor carpi _____ is responsible for flexing the hand and abducting it.
The flexor carpi _____ is responsible for flexing the hand and abducting it.
radialis
The palmaris longus tenses the palmar _____ and flexes the hand.
The palmaris longus tenses the palmar _____ and flexes the hand.
aponeurosis
The flexor carpi ulnaris inserts at the pisiform and hook of the _____.
The flexor carpi ulnaris inserts at the pisiform and hook of the _____.
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The flexor digitorum superficialis flexes the middle phalanges at the _____ interphalangeal joints.
The flexor digitorum superficialis flexes the middle phalanges at the _____ interphalangeal joints.
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The flexor digitorum profundus flexes the distal phalanges at the metacarpophalangeal joints and is located at the ____ of the medial and anterior ulna.
The flexor digitorum profundus flexes the distal phalanges at the metacarpophalangeal joints and is located at the ____ of the medial and anterior ulna.
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The flexor pollicis longus flexes the thumb and originates from the anterior surface of the ____.
The flexor pollicis longus flexes the thumb and originates from the anterior surface of the ____.
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The brachioradialis aids in elbow flexion and is located on the proximal ⅔ of the lateral ____ ridge.
The brachioradialis aids in elbow flexion and is located on the proximal ⅔ of the lateral ____ ridge.
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The extensor carpi radialis longus extends and abducts the hand from the dorsal aspect of the base of the ____ metacarpal.
The extensor carpi radialis longus extends and abducts the hand from the dorsal aspect of the base of the ____ metacarpal.
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The extensor carpi ulnaris extends and adducts the hand, originating from the lateral epicondyle of the ____.
The extensor carpi ulnaris extends and adducts the hand, originating from the lateral epicondyle of the ____.
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The extensor digitorum extends the medial 4 digits through the ____ expansion.
The extensor digitorum extends the medial 4 digits through the ____ expansion.
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The supinator muscle allows for forearm supination and is located at the lateral condyle of the ____.
The supinator muscle allows for forearm supination and is located at the lateral condyle of the ____.
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The extensor pollicis longus extends the thumb from the posterior surface of the middle third of the ____.
The extensor pollicis longus extends the thumb from the posterior surface of the middle third of the ____.
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The extensor indices is responsible for extending the pointer finger and uses the ____ expansion of the second digit.
The extensor indices is responsible for extending the pointer finger and uses the ____ expansion of the second digit.
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The extensor pollicis brevis extends the thumb from the dorsal aspect of the distal 3rd of the ____.
The extensor pollicis brevis extends the thumb from the dorsal aspect of the distal 3rd of the ____.
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Study Notes
Muscle Origins, Insertions, and Actions
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Pronator Teres: Originates at the coronoid process and medial epicondyle of the humerus. Inserts at the middle of the lateral surface of the radius. Action: Pronates and flexes the arm at the elbow, flexes and abducts the hand.
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Flexor Carpi Radialis: Originates at the medial epicondyle of the humerus. Inserts at the base of the second metacarpal. Action: Flexes and abducts the hand.
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Palmaris Longus: Originates at the medial epicondyle of the humerus. Inserts at the palmar aponeurosis. Action: Flexes the hand and tenses the palmar aponeurosis.
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Flexor Carpi Ulnaris: Originates at the medial epicondyle of the humerus and pisiform/hook of hamate, 5th metacarpal. Inserts at the shafts of the medial four phalanges. Action: Flexes and adducts the hand.
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Flexor Digitorum Superficialis: Originates at the medial epicondyle. Inserts at the middle four phalanges (medial four digits). Action: Flexes the middle phalanges at the proximal interphalangeal joints, and also flexes the proximal phalanges at the metacarpophalangeal joints.
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Flexor Digitorum Profundus: Originates at the proximal ¼ of the medial and anterior ulna and interosseus membrane. Inserts at the bases of the distal phalanges of the 4th/5th digits. Action: Flexes the distal phalanges.
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Flexor Policis Longus: Originates at the anterior surface of the radius and interosseus membrane. Inserts at the base of the distal phalanx of the thumb. Action: Flexes the thumb.
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Brachioradialis: Originates at the proximal ⅓ of the lateral supracondylar ridge of the humerus. Inserts at the lateral surface of the distal end of the radius proximal to the styloid process. Action: Elbow flexion, hand neutral.
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Extensor Carpi Radialis Longus: Originates at the lateral supracondylar ridge of the humerus. Inserts at the dorsal aspect of the base of the second metacarpal. Action: Extends and abducts the hand.
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Extensor Carpi Radialis Brevis: Originates at the lateral supracondylar ridge of the humerus. Inserts at the dorsal aspect of the base of the third metacarpal. Action: Extends and abducts the hand.
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Extensor Carpi Ulnaris: Originates at the lateral epicondyle of the humerus. Inserts at the dorsal aspect of the base of the fifth metacarpal. Action: Extends and adducts the hand.
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Extensor Digitorum: Originates at the lateral epicondyle of the humerus. Inserts at the extensor expansion of the medial 4 digits. Action: Extends the medial 4 digits.
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Extensor Digiti Minimi: Originates at the lateral epicondyle of the humerus. Inserts at the extensor expansion of the fifth digit. Action: Extends the pinky.
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Supinator: Originates at the lateral condyle of the humerus. Inserts at lateral, posterior, and anterior surface of the proximal third of the radius. Action: Supinates the forearm.
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Extensor Policis Longus: Originates at the posterior surface of the middle third of the radius and interosseus membrane. Inserts at the dorsal aspect of the distal phalanx of the thumb. Action: Extends the thumb.
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Extensor Policis Brevis: Originates at the posterior surface of the distal third of the radius. Inserts at the dorsal aspect of the proximal phalanx of the thumb. Action: Extends the thumb.
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Extensor Indices: Originates at the posterior surface of the distal third of the ulna and interosseus membrane. Inserts at the extensor expansion of the second digit. Action: Extends the pointer finger.
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Description
Test your knowledge on the origins, insertions, and actions of key muscles, including Pronator Teres, Flexor Carpi Radialis, and more. This quiz will help reinforce your understanding of muscle anatomy and their functions in the human body.
