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Deep_Muscles_of_Flexor_Compartment_of_Forearm.pdf
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Dr.Sherif Fahmy
August 15, 2019
Science
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Deep_Muscles_of_Flexor_Compartment_of_Forearm.pdf
Dr.Sherif Fahmy
August 15, 2019
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Transcript
Deep Muscles of Flexor (Anterior) Compartment of Forearm
1- Flexor digitorum profundus. 2- Flexor pollicis longus. 3- Pronator
quadratus.
Pronator teres Flexor carpi radialis Palmaris longus Flexor carpi ulnaris
Flexor digitorum superficialis (cut) Flexor digitorum profundus Flexor pollicis longus Pronator quadratus Flexor retinaculum Lumbricals Deep muscles of forearm Lateral Medial
Flexor digitorum profundus Flexor pollicis longus Pronator quadratus Origin of
flexor digitorum profundus Ulnar aponeurosis Origin of pronator quadratus Origin of flexor pollicis longus m. Insertion of pronator quadratus m. Interosseous membrane
Flexor Digitorum Profundus
Interosseous membrane Flexor digitorum profundus from upper ¾ of anterior
and medial surfaces of ulna (main origin) Flexor retinaculum Ulnar aponeurosis
Common synovial sheath (ulnar bursa) Flexor retinaculum Synovial sheath Fibrous
flexor sheath
Tendons of flexor digitorum profundus Tendons of flexor digitorum superficialis
Lumbricals
Action of flexor digitorum profundus • Flexes all joints of
the medial four fingers. • Flexes the wrist. Nerve supply -Medial ½ from ulnar nerve. -Lateral ½ from anterior interosseous nerve (branch from median)
Flexor Pollicis Longus
Interosseous membrane Flexor retinaculum Flexor pollicis longus Tendon of flexor
pollicis longus Upper 2/3 of anterior surface of radius Insertion to palmar aspect of distal phalanx of thumb
Tendon of flexor carpi radialis Flexor retinaculum Tendon of flexor
pollicis longus Tendons of flexor digitorum superficialis Tendons of flexor digitorum profundus
Action of flexor pollicis longus • Flexes all joints of
the thumb. • Assists in flexion of the wrist. Nerve supply -Anterior interosseous nerve (branch from median)
Pronator Quadratus Muscle
Pronator Quadratus M. Origin: from oblique ridge on the lower
¼ of anterior surface of the shaft of ulna Insertion: into lower ¼ of anterior and medial surfaces of radius
Pronator quadratus m.
Action of pronator quadratus Pronation of forearm on radioulnar joints.
Nerve supply -Anterior interosseous nerve (branch from median)