Muscles of the Anterior Compartment of the Forearm Flashcards
Insertion of Pronator Teres (PT)
Middle of Convexity of Lateral Surface of the Radius
Origin of Pronator Teres (PT)
Ulnar Head: Coronoid Process of Ulna
Humeral Head: Medial Epicondyle of Humerus
Innervation of Pronator Teres (PT)
Median Nerve (C6,C7)
Action of Pronator Teres (PT)
Flexes and Pronates the forearm
Origin of Flexor Carpi Radialis
Medial Epicondyle of Humerus
Insertion of Flexor Carpi Radialis
Base of the 2nd Metacarpal
Innervation of Flexor Carpi Radialis
Median Nerve (C6,C7)
Action of Flexor Carpi Radialis (FCR)
Flexes and ABducts the hand at the wrist
Origin of Palmaris Longus
Medial Epicondyle of Humerus
Insertion of Palmaris Longus
1)Distal Half of Flexor Retinaculum , 2) Palmar Aponeurosis
Innervation of Palmaris Longus
Median Nerve (C7,C8)
Action of Palmaris Longus
Flexes hand (at wrist), tenses palmar aponeurosis
Origin of Flexor Carpi Ulnaris
Olecranon, Posterior Border of Ulna (via aponeurosis)
Insertion of Flexor Carpi Ulnaris
Pisiform, Hook of Hamate, and 5th metacarpal
Innervation of Flexor Carpi Ulnaris
Ulnar Nerve (C7, C8)
Action of Flexor Carpi Ulnaris
Flex and ADDuct the hand at wrist
Which Muscles Make up the Superficial Layer of the Anterior Compartment of Forearm?
Pronator Teres
Flexor Carpi Radialis
Palmaris Longus
Flexor Carpi Ulnaris
Which muscle makes up the intermediate layer?
Flexor Digitorum Superficialis
Origin of Flexor Digitorum Superficialis
Humero-Ulnar Head: Medial Epicondyle of Humerus and Coronoid Process of Ulna
Radial Head: Oblique Line of Radius
Insertion of Flexor Digitorum Superficialis
Shafts (bodies) of middle phalanges of medial four digits
Innervation of Flexor Digitorum Superficialis
Median Nerve (C7,C8,T1)
Action of Flexor Digitorum Superficialis
1) Flexes Wrist Joint
2) Flexes Proximal Interphalangeal Joints of Medial Four Digits;
3) Acting more strongly, flexes the proximal phalanges at the metacarpophalangeal joints
What muscles make up the deep layer of the anterior compartment of the forearm?
Flexor Digitorum Profundus
Flexor Pollicis Longus
Pronator Quadratus
Origin of Flexor Digitorum Profundus
Proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane
Insertion of Flexor Digitorum Profundus
Bases of Distal Phalanges 2, 3, 4, and 5
Innervation of Flexor Digitorum Profundus
Lateral Part (digits 2 and 3): Median Nerve (C8, T1) Medial Part (digits 4 and 5): Ulnar Nerve (C8, T1)
Action of Flexor Digitorum Profundus
1) Flexes Wrist Joint
2) Flex Distal Interphalangeal Joints of Digits 2, 3, 4, and 5; assist in wrist flexion
Origin of Flexor Pollicis Longus
Anterior Surface of the Radius and its adjacent interosseous membrane
Insertion of Flexor Pollicis Longus
Base of the Distal Phalanx of the thumb
Innervation of Flexor Pollicis Longus
Anterior Interosseous Nerve (C8,T1), from median nerve
Action of Flexor Pollicis Longus
1) Flexes Wrist
2) Flexes the metacarpophalangeal and interphalangeal joints of thumb
Origin of Pronator Quadratus
Distal 1/4 of Anterior Surface of Ulna
Insertion of Pronator Quadratus
Distal 1/4 of anterior surface of Radius
Innervation of Pronator Quadratus
Anterior Interosseous Nerve (C8, T1), from median nerve
Action of Pronator Quadratus
Pronates the forearm; deep fibers are going to bind radius and ulna
