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Gross Anatomy Set 07
Muscles of the Forearm
97
Anatomy
Professional
08/31/2013

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Term
Flexor Compartment: Muscles in Layers
Definition
Superficial: Pronator Teres, Flexor Carpi Radialis, Palmaris Longus, Flexor Carpi Ulnaris Middle: Flexor Digitorum Superficialis Deep: Flexor Digitorum Profundus, Flexor Pollicis Longus, Pronator Quadratus
Term
Extensor Compartment: Muscles in Layers
Definition
Superficial: Brachioradialis, Extensor Carpi Radialis Longus, Extensor Carpi Radialis Brevis, Extensor Digitorum Communis, Extensor Digiti Minimi, Extensor Carpi Ulnaris

Deep: Supinator, Abductor Pollicis Longus, Extensor Indicis Proprius, Extensor Pollicis Brevis, Extensor Pollicis Longus
Term
Pronator Teres: Origin
Definition
Humerus: Medial Epicondyle
Term
Pronator Teres: Insertion
Definition
Middle of lateral radius
Term
Pronator Teres: Innervation
Definition
Median n.
Term
Pronator Teres: Blood Supply
Definition
Radial and Ulnar aa.
Term
Pronator Teres: Action
Definition
Pronates and flexes the forearm
Term
Flexor Carpi Radialis: Origin
Definition
Humerus: Medial epicondyle
Term
Flexor Carpi Radialis: Insertion
Definition
Bases of 2nd and 3rd metacarpals
Term
Flexor Carpi Radialis: Innervation
Definition
Median n.
Term
Flexor Carpi Radialis: Blood Supply
Definition
Radial a.
Term
Flexor Carpi Radialis: Action
Definition
Abducts and flexes hand
Term
Palmaris Longus: Origin
Definition
Humerus: Medial epicondyle
Term
Palmaris Longus: Insertion
Definition
Palmar Aponeurosis
Term
Palmaris Longus: Innervation
Definition
Median n.
Term
Palmaris Longus: Blood Supply
Definition
Ulnar a.
Term
Palmaris Longus: Action
Definition
Flexes hand
Term
Flexor Carpi Ulnaris: Origin
Definition
Humerus: Medial epicondyle
Term
Flexor Carpi Ulnaris: Insertion
Definition
Pisiform, Hamate, base of 5th metacarpal
Term
Flexor Carpi Ulnaris: Innervation
Definition
Ulnar n.
Term
Flexor Carpi Ulnaris: Blood Supply
Definition
Ulnar a.
Term
Flexor Carpi Ulnaris: Action
Definition
Adducts and flexes hand
Term
Flexor Digitorum Superficialis: Origin
Definition

Humerus: Medial epicondyle

Ulna: Coronoid Process

Term
Flexor Digitorum Superficialis: Insertion
Definition
Middle Phalanges
Term
Flexor Digitorum Superficialis: Innervation
Definition
Median n.
Term
Flexor Digitorum Superficialis: Blood Supply
Definition
Radial and Ulnar aa.
Term
Flexor Digitorum Superficialis: Action
Definition
Flexes hand, MP joints, and PIP joints of digits 2-5
Term
Flexor Digitorum Profundus: Origin
Definition
Proximal 3/4 of ulna and interosseus membrane
Term
Flexor Digitorum Profundus: Insertion
Definition
Distal Phalanges
Term
Flexor Digitorum Profundus: Innervation
Definition
Radial Half (2nd-3rd digits): Median n.
Ulnar Half (4th-5th digits): Ulnar n.
Term
Flexor Digitorum Profundus: Blood Supply
Definition
Anterior interosseus a.
Term
Flexor Digitorum Profundus: Action
Definition
Flexes hand, MP, PIP and DIP joints of digits 2-5
Term
Flexor Pollicis Longus: Origin
Definition
Anterior radius and interosseus membrane
Term
Flexor Pollicis Longus: Insertion
Definition
Base of distal thumb
Term
Flexor Pollicis Longus: Innervation
Definition
Median n.
Term
Flexor Pollicis Longus: Blood Supply
Definition
Anterior interosseus a.
Term
Flexor Pollicis Longus: Action
Definition
Flexes IP joint of thumb
Term
Pronator Quadratus: Origin
Definition
Distal 1/4 of Ulna
Term
Pronator Quadratus: Insertion
Definition
Distal 1/4 of Radius
Term
Pronator Quadratus: Innervation
Definition
Median n.
Term
Pronator Quadratus: Blood Supply
Definition
Anterior interosseus a.
Term
Pronator Quadratus: Action
Definition
Pronates Forearm
Term
Brachioradialis: Origin
Definition
Humerus: Lateral supracondylar ridge
Term
Brachioradialis: Insertion
Definition
Distal end of radius
Term
Brachioradialis: Innervation
Definition
Radial n.
Term
Brachioradialis: Blood Supply
Definition
Radial a.
Term
Brachioradialis: Action
Definition
Flexes forearm at mid-prone position
Term
Extensor Carpi Radialis Longus: Origin
Definition
Humerus: Lateral supracondylar ridge
Term
Extensor Carpi Radialis Longus: Insertion
Definition
Base of 2nd metacarpal
Term
Extensor Carpi Radialis Longus: Innervation
Definition
Radial n.
Term
Extensor Carpi Radialis Longus: Blood Supply
Definition
Radial a.
Term
Extensor Carpi Radialis Longus: Action
Definition
Abducts and extends hand
Term
Extensor Carpi Radialis Brevis: Origin
Definition
Humerus: Lateral Epicondyle
Term
Extensor Carpi Radialis Brevis: Insertion
Definition
Base of 3rd Metacarpal
Term
Extensor Carpi Radialis Brevis: Innervation
Definition
Radial n.
Term
Extensor Carpi Radialis Brevis: Blood Supply
Definition
Radial a.
Term
Extensor Carpi Radialis Brevis: Action
Definition
Abducts and Extends Hand
Term
Extensor Digitorum Communis: Origin
Definition
Humerus: Lateral Epicondyle
Term
Extensor Digitorum Communis: Insertion
Definition
Extensor hood of medial 4 digits
Term
Extensor Digitorum Communis: Innervation
Definition
Deep branch of Radial n. (posterior interosseus)
Term
Extensor Digitorum Communis: Blood Supply
Definition
Posterior Interosseus a.
Term
Extensor Digitorum Communis: Action
Definition
Extends 4 fingers (except thumb)
Term
Extensor Digiti Minimi: Origin
Definition
Humerus: Lateral Epicondyle
Term
Extensor Digiti Minimi: Insertion
Definition
Extensor hood of 5th digit
Term
Extensor Digiti Minimi: Innervation
Definition
Deep branch of Radial n.
Term
Extensor Digiti Minimi: Blood Supply
Definition
Posterior Interosseus a.
Term
Extensor Digiti Minimi: Action
Definition
Extends 5th digit
Term
Extensor Carpi Ulnaris: Origin
Definition
Humerus: Lateral Epicondyle
Term
Extensor Carpi Ulnaris: Insertion
Definition
Base of 5th Metacarpal
Term
Extensor Carpi Ulnaris: Innervation
Definition
Deep branch of Radial n.
Term
Extensor Carpi Ulnaris: Blood Supply
Definition
Posterior Interosseus a.
Term
Extensor Carpi Ulnaris: Action
Definition
Adducts and extends hand
Term
Supinator: Origin
Definition
Ulna: Supinator Fossa
Term
Supinator: Insertion
Definition
Proximal 1/3 of lateral radius
Term
Supinator: Innervation
Definition
Deep branch of radial n.
Term
Supinator: Blood Supply
Definition
Posterior Interosseus a.
Term
Supinator: Action
Definition
Supinates Forearm
Term
Abductor Pollicis Longus: Origin
Definition
Middle radius, ulna, and interosseus membrane
Term
Abductor Pollicis Longus: Insertion
Definition
Base of 1st Metacarpal
Term
Abductor Pollicis Longus: Innervation
Definition
Deep branch of radial n.
Term
Abductor Pollicis Longus: Blood Supply
Definition
Posterior Interosseus a.
Term
Abductor Pollicis Longus: Action
Definition
Abducts thumb and extends thumb at MP
Term
Extensor Indicis Proprius: Origin
Definition
Posterior Ulna and Interosseus Membrane
Term
Extensor Indicis Proprius: Insertion
Definition
Extensor hood of 2nd digit
Term
Extensor Indicis Proprius: Innervation
Definition
Deep branch of radial n.
Term
Extensor Indicis Proprius: Blood Supply
Definition
Posterior Interosseus a.
Term
Extensor Indicis Proprius: Action
Definition
Extends 2nd digit
Term
Extensor Pollicis Brevis: Origin
Definition
Posterior Radius and Interosseus Membrane
Term
Extensor Pollicis Brevis: Insertion
Definition
Proximal phalanx of thumb
Term
Extensor Pollicis Brevis: Innervation
Definition
Deep Radial n.
Term
Extensor Pollicis Brevis: Blood Supply
Definition
Posterior Interosseus a.
Term
Extensor Pollicis Brevis: Action
Definition
Extends proximal phalanx of thumb
Term
Extensor Pollicis Longus: Origin
Definition
Posterior Ulna and Interosseus Membrane
Term
Extensor Pollicis Longus: Insertion
Definition
Distal phalanx of thumb
Term
Extensor Pollicis Longus: Innervation
Definition
Deep radial n.
Term
Extensor Pollicis Longus: Blood Supply
Definition
Posterior Interosseus a.
Term
Extensor Pollicis Longus: Action
Definition
Extends distal phalanx of thumb
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