Flexor digitorum superficialis muscle
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View Henry Knipe's current disclosuresAt the time the article was last revised Mostafa El-Feky had no financial relationships to ineligible companies to disclose.
View Mostafa El-Feky's current disclosures- Flexor digitorum superficialis (FDS) muscles
- Flexor digitorum sublimis (FDS) muscle
- Flexor digitorum sublimis (FDS) muscles
Flexor digitorum superficialis (FDS) muscle, also known as flexor digitorum sublimis muscle, is a muscle in the second (intermediate) layer of the anterior compartment of the forearm. It splits into four tendons, passes through the carpal tunnel under the flexor retinaculum. At the level of the head of the metacarpal, the flexor digitorum superficialis tendons split and wrap around the flexor digitorum profundus muscle creating an aperture for the flexor digitorum profundus to travel through. This crossing of the tendons can be referred to as the Camper chiasm. The flexor digitorum superficialis tendons rejoin deep to the flexor digitorum profundus and insert at the volar side of the proximal portion of the middle phalanx of the 2nd- 5th digits. It is one of the extrinsic muscles of the hand.
Summary
-
origin
- humeroulnar head: medial epicondyle of the humerus and coronoid process of the ulna
- radial head: diaphysis of the radius
- insertion: via four tendons into the volar aspect of the base of the middle phalanx of digits 2-5 (index, middle, ring and little fingers)
- innervation: median nerve (C7-T1)
- action: flexion of the proximal interphalangeal joints
Quiz questions
References
- 1. Michael Schünke, Lawrence M. Ross, Erik Schulte et al. General Anatomy and Musculoskeletal System. (2010) ISBN: 9781604062922 - Google Books
Related articles: Anatomy: Upper limb
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skeleton of the upper limb
- clavicle
- scapula
- humerus
- radius
- ulna
- hand
- accessory ossicles of the upper limb
- accessory ossicles of the shoulder
- accessory ossicles of the elbow
-
accessory ossicles of the wrist (mnemonic)
- os centrale carpi
- os epilunate
- os epitriquetrum
- os styloideum
- os hamuli proprium
- lunula
- os triangulare
- trapezium secondarium
- os paratrapezium
- os radiostyloideum (persistent radial styloid)
- joints of the upper limb
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pectoral girdle
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shoulder joint
- articulations
- associated structures
- joint capsule
- bursae
- ligaments
- movements
- scapulothoracic joint
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glenohumeral joint
- arm flexion
- arm extension
- arm abduction
- arm adduction
- arm internal rotation (medial rotation)
- arm external rotation (lateral rotation)
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- arterial supply - scapular anastomosis
- ossification centers
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shoulder joint
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elbow joint
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- ligaments
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- arterial supply - elbow anastomosis
- development
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wrist joint
- articulations
-
ligaments
- intrinsic ligaments
- extrinsic ligaments
- radioscaphoid ligament
- dorsal intercarpal ligament
- dorsal radiotriquetral ligament
- dorsal radioulnar ligament
- volar radioulnar ligament
- radioscaphocapitate ligament
- long radiolunate ligament
- Vickers ligament
- short radiolunate ligament
- ulnolunate ligament
- ulnotriquetral ligament
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- ulnar collateral ligament
- associated structures
- extensor retinaculum
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hand joints
- articulations
- carpometacarpal joint
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metacarpophalangeal joints
- palmar ligament (plate)
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interphalangeal joints
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- ossification centers
- articulations
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pectoral girdle
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anterior compartment of the forearm
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posterior compartment of the forearm (extensors)
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- deep
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accessory muscles
- elbow
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- flexor indicis profundus
- flexor carpi radialis vel profundus
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- volar wrist ulnar-side
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arteries
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arteries
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brachial plexus (mnemonic)
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- branches from the cords
- lateral cord
- posterior cord
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- terminal branches
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