Flexor digitorum superficialis muscle - wikipedia Flexor digitorum superficialis muscle Flexor digitorum superficialis Transverse section across distal ends of radius and ulna. ( Flexor dig. subliminis labeled at center top. ) Details Origin medial epicondyle of the humerus ( common flexor tendon ) as well as parts of the radius and ulna. Insertion anterior margins on the bases of the middle phalanges of the four fingers Artery ulnar artery Nerve median nerve Actions flexor of fingers ( primarily at proximal interphalangeal joints ) Antagonist Extensor digitorum muscle Identifiers Latin musculus flexor digitorum superficialis Dorlands / Elsevier m_22 / 12549098 TA A04. 6.02. 033 FMA 38469 Anatomical terms of muscle ( edit on Wikidata ) Flexor digitorum superficialis ( flexor digitorum sublimis ) is an extrinsic flexor muscle of the fingers at the proximal interphalangeal joints. It is in the anterior compartment of the forearm. It is sometimes considered to be the deepest part of the superficial layer of this compartment, and sometimes considered to be a distinct, `` intermediate layer '' of this compartment. It is relatively common for the Flexor digitorum superficialis to be missing from the little finger, bilaterally and unilaterally, which can cause problems when diagnosing a little finger injury. Contents 1 Structure 1.1 Innervation 2 Function 3 Additional images 4 References 5 External links Structure The muscle has two classically described heads - the humeroulnar and radial - and it is between these heads that the median nerve and ulnar artery pass. The ulnar collateral ligament of elbow joint gives its origin to part of this muscle. Four long tendons come off this muscle near the wrist and travel through the carpal tunnel formed by the flexor retinaculum. These tendons, along with those of flexor digitorum profundus, are enclosed by a common flexor sheath. The tendons attach to the anterior margins on the bases of the intermediate phalanges of the four fingers. These tendons have a split ( Camper 's Chiasm ) at the end of them through which the tendons of flexor digitorum profundus pass. Innervation The Flexor digitorium superficialis muscle is innervated by the median nerve ( C7, C8, T1 ). Function The primary function of flexor digitorum superficialis is flexion of the middle phalanges of the fingers at the proximal interphalangeal joints, however under continued action it also flexes the metacarpophalangeal joints and wrist joint. To test flexor digitorum superficialis, one finger is flexed at the proximal interphalangeal joint against resistance, while the remaining three fingers are held fully extended ( to inactivate flexor digitorum profundus ). Additional images Tendons of forefinger and vincula tendina. Cross-section through the middle of the forearm. Transverse section across the wrist and digits. The mucous sheaths of the tendons on the front of the wrist and digits. The muscles of the left hand. Palmar surface. The radial and ulnar arteries. Flexor digitorum superficialis muscle Flexor digitorum superficialis muscle Flexor digitorum superficialis muscle Flexor digitorum superficialis muscle Flexor digitorum superficialis muscle Muscles of upper limb. Cross section. References Jump up ^ Medical Mnemonics.com : 273 1117 Jump up ^ `` Dissector Answers - Forearm & Wrist ''. Retrieved 2008 - 01 - 17. Jump up ^ `` uams.edu ''. Retrieved 2008 - 01 - 17. Jump up ^ `` J Hand Surg Eur ''. Retrieved 2011 - 02 - 06. Jump up ^ Lutsky KF, Giang EL, Matzon JL ( January 2015 ). `` Flexor tendon injury, repair and rehabilitation ''. Orthopedic Clinics of North America. 46 ( 1 ) : 67 -- 76. doi : 10.1016 / j. ocl. 2014.09. 004. PMID 25435036. External links Illustration : upper - body / flexor - digitorum - superficialis from The Department of Radiology at the University of Washington Muscles of the arm Shoulder deltoid rotator cuff supraspinatus infraspinatus teres minor subscapularis teres major fascia : deltoid fascia supraspinous fascia infraspinous fascia Arm ( compartments ) anterior coracobrachialis biceps brachialis posterior triceps brachii anconeus articularis cubiti fascia axillary sheath axillary fascia brachial fascia intermuscular septa lateral medial other spaces quadrangular space triangular space triangular interval Forearm anterior superficial : pronator teres palmaris longus flexor carpi radialis flexor carpi ulnaris flexor digitorum superficialis deep : pronator quadratus flexor digitorum profundus flexor pollicis longus posterior superficial : mobile wad brachioradialis extensor carpi radialis longus and brevis extensor digitorum extensor digiti minimi extensor carpi ulnaris deep : supinator anatomical snuff box abductor pollicis longus extensor pollicis brevis extensor pollicis longus extensor indicis fascia bicipital aponeurosis common tendons extensor flexor antebrachial fascia other cubital tunnel Hand lateral volar thenar opponens pollicis flexor pollicis brevis abductor pollicis brevis adductor pollicis medial volar hypothenar opponens digiti minimi flexor digiti minimi brevis abductor digiti minimi palmaris brevis intermediate lumbrical interossei dorsal palmar fascia posterior : extensor retinaculum extensor expansion anterior : flexor retinaculum palmar aponeurosis Retrieved from `` https://en.wikipedia.org/w/index.php?title=Flexor_digitorum_superficialis_muscle&oldid=722282385 '' Categories : Muscles of the upper limb Forearm Hidden categories : Medicine infobox template using GraySubject or GrayPage Medicine infobox template using Dorlands parameter Talk Contents About Wikipedia Català Dansk Deutsch Español فارسی Français Galego Hrvatski Bahasa Indonesia עברית Magyar Mirandés Nederlands 日本 語 Polski Português Română Русский Slovenščina Svenska ไทย Edit links This page was last edited on 27 May 2016, at 02 : 27. 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Question: where does the flexor digitorum superficialis distally attach
Answer: The tendons attach to the anterior margins on the bases of the intermediate phalanges of the four fingers. These tendons have a split (Camper's Chiasm) at the end of them through which the tendons of flexor digitorum profundus pass.