Muscles of Anterior Compartment of Forearm Flashcards
List the Superficial (first) Layer of Muscles in the Anterior Compartment of the Forearm
Pronator Teres
Flexor Carpi Radialis (FCR)
Palmaris Longus
Flexor Carpi Ulnaris (FCU)
List the Intermediate (second) Layer of Muscles in the Anterior Compartment of the Forearm
Flexor Digitorum Superficialis (FDS)
List the Deep (third) Layer of Muscles in the Anterior Compartment of the Forearm
Flexor Digitorum Profundus (FDP)
Flexor Pollicis Longus (FPL)
Pronator Quadratus
Pronator Teres - Origin
Ulnar Head
Humeral Head
Coronoid process of ulna
Pronator Teres - Insertion
Ulnar Head
Humeral Head
Middle of convexity of lateral surface of radius
Pronator Teres - Innervation
Ulnar Head
Humeral Head
Median Nerve (C6, C7)
Pronator Teres - Action(s)
Ulnar Head
Humeral Head
Pronates forearm and flexes elbow joint
Flexor Carpi Radialis (FCR) - Origin
Medial epicondyle of humerus
Flexor Carpi Radialis (FCR) - Insertion
Base of 2nd (3rd) metacarpal
Flexor Carpi Radialis (FCR) - Innervation
Median Nerve (C6, C7)
Flexor Carpi Radialis (FCR) - Action(s)
Flexes and abducts hand at wrist
Palmaris Longus - Origin
Medial epicondyle of humerus
Palmaris Longus - Insertion
Distal half of flexor retinaculum
Palmar aponeurosis
Palmaris Longus - Innervation
Median Nerve (C7, C8)
Palmaris Longus - Action(s)
Flexes hand (at wrist) and tenses palmar aponeurosis
Flexor Carpi Ulnaris (FCU) - Origin
Humeral Head
Ulnar Head
Olecranon and posterior border of ulna (via aponeurosis)
Flexor Carpi Ulnaris (FCU) - Insertion
Humeral Head
Ulnar Head
Pisiform
Hook of hamate
5th metacarpal
Flexor Carpi Ulnaris (FCU) - Innervation
Humeral Head
Ulnar Head
Ulnar Nerve (C7, C8)
Flexor Carpi Ulnaris (FCU) - Action(s)
Humeral Head
Ulnar Head
Flexes and adducts hand at wrist
Flexor Digitorum Superficialis (FDS) - Origin
Humero-ulnar head: medial epicondyle of humerus and coronoid process of ulna
Radial head: oblique line of radius
Flexor Digitorum Superficialis (FDS) - Insertion
Shafts (bodies) of middle phalanges of medial four digits
Flexor Digitorum Superficialis (FDS) - Innervation
Median Nerve (C7, C8, T1)`
Flexor Digitorum Superficialis (FDS) - Action(s)
Flexes wrist joint, carpometacarpal joints
Flexes proximal interphalangeal joints of middle four digits
Also flexes proximal phalanges at metacarpophalangeal joints
Flexor Digitorum Profundus (FDP) - Origin
Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane
Flexor Digitorum Profundus (FDP) - Insertion
Bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits
Flexor Digitorum Profundus (FDP) - Innervation
Lateral Part (digits 2&3): median nerve (C8, T1) Medial Part (digits 4&5): ulnar nerve (C8, T1)
Flexor Digitorum Profundus (FDP) - Action(s)
Flexes wrist joint, carpometacarpal joints
Flexes distal interphalangeal joints of digits 2-5
Assists with wrist flexion
Flexor Pollicis Longus (FPL) - Origin
Anterior surface of radius and adjacent interosseous membrane
Flexor Pollicis Longus (FPL) - Insertion
Base of distal phalanx of thumb
Flexor Pollicis Longus (FPL) - Innervation
Anterior interosseous nerve, from median nerve (C8, T1)
Flexor Pollicis Longus (FPL) - Action(s)
Flexes wrist joint, carpometacarpal joints
Flexes metacarpophalangeal and interphalangeal joints of thumb
Pronator Quadratus - Origin
Distal quarter of anterior surface of ulna
Pronator Quadratus - Insertion
Distal quarter of anterior surface of radius
Pronator Quadratus - Innervation
none
Pronator Quadratus - Action(s)
Pronates forearm; deep fibers bind radius and ulna together