Together with supinator, abductor pollicis longus, extensor pollicis longus, and extensor pollicis brevis muscles, it causes the extension of the wrist and fingers. Innervation. It belongs to the deep extensors of the forearm. Contentsto top. Extensor Indicis Action extension of digit II Innervation radial nerve Extensor from BIOLOGY 250 at Cleveland University-Kansas City Physical Exam Hand; Hand Anatomy (Main) Hand Pain (Main) Physical Exam Wrist; ... Extensor Indicis. Posterior Interosseous Nerve (C7-C8) Clinical Significance. Bend it. [1]. A Thoma, A Quttainah. Extensor Indicis: Origin, Insertion, Nerve Supply & Action Extensor Indicis: The extensor indicis muscle allows the index finger to be independent of the other fingers during extension. ... and how to avoid disturbing the superficial branch of the radial nerve in patients with de Quervain tenosynovitis during surgery. For independent adduction of the small finger, Hoch 12 described extensor indicis proprius (EIP) transfer in 1993, without details of the clinical results. Extensor Pollicis Brevis: The extensor pollicis brevis muscle can be found medially and deep to the abductor pollicis longus muscle. Description: The Extensor indicis is a narrow, elongated muscle, placed medial to, and parallel with, the preceding. Extensor indicis proprius tendon transfer for extensor pollicis longus rupture. The wrist extensor muscles of the hand are located in the back of the forearm and have long tendons connecting them to bones in the hand, where they exert their action. the extensor of the little finger), the tendon of the extensor indicis runs and inserts on the ulnar side of the tendon of the common extensor digitorum. 1 Origin; 2 Insertion; 3 Actions; 4 Vascular Supply; 5 Nerve; 6 Clinical Significance; 7 See Also; 8 References; Extensor Indicis. It may assist in wrist extension. The extensor indicis muscle is an accessory extensor of the 2 nd digit. Origin: Originates from the posterior surface of the radius and interosseous membrane. It arises, from the dorsal surface of the body of the ulna below the origin of the Extensor pollicis longus, and from the interosseous membrane. (Note: extensor indicis proprius has the most distal muscle belly of the extensors). It is one of the extrinsic muscles of the hand.. Summary. Extensor indicis proprius transfer can be a reliable option for correction of abduction deformity of the small finger, maintaining active abduction and full flexion and extension. The interosseous membrane is next to it. Nerve. The primary function of Extensor Indicis Propius is the extension of second digit at metacarpophalangeal and interphalangeal joints. The interosseous membrane is next to it. Relations. Warm Therapy Treatment for Extensor Indicis Injury or Pain: There are a lot of heat therapy or warm therapy gels readily available in the market which can be used to treat extensor indicis injury or pain. ANTERIOR GLIDE (of radius on ulna): Uses: Pain management, tissue stretch, and increasing pronation. Start studying Anatomy - Extensor indicis muscle. Arterial Supply: Posterior interosseous artery. The order of innervation is important in differentiating a radial nerve injury from a mechanical myotendinous injury or muscle disruption after a forearm laceration. anatomy of an extensor indicis (EI) muscle with a double tendon and the associated distribution of the deep branch of the radial nerve (DBRN). EDC (extensor digitorum communis): no direct attachment to phalanx, attaches to the extensor expansions; EIP (extensor indicis proprius): lies ulnar to 1st EDC tendon) Fifth compartment. Table I. Extensor indicis proprius transfers Patient Age (yr) EIP transfer to: J. H. 19 Median nerve injury APB N. T. 45 Median nerve injury APB J. They then joined the medial slips of the extensor [4] Double tendons of the extensor indicis proprius was also reported. flexor carpi ulnaris, flexor carpi radialis, pronator quadratus, extensor indicis, extensor digitorum, extensor carpi radialis longus and brevis, ulnar artery, radial artery, interosseous arteries, venous network of hand, cephalic vein, radial nerve, median nerve, and ulnar nerve. Through this attachment to the finger, the muscles can act on multiple joints as once, extending the entire finger until it forms a straight line. The wrist extensors includes extensor carpi radialis longus (ECRL) , extensor carpi radialis brevis (ECRB) , extensor digitorum (ED) , extensor digiti minimi (EDM) , extensor carpi ulnaris (ECU) and extensor indicis (EI). It assists in abducting the index finger. Extensor Indicis :-Muscle details :- Extensor indicis is a narrow, elongated muscle found in the posterior compartment of the forearm. [2] Split tendons of the muscle inserting on both ulnar and the radial side of the common extensor digitorum was also reported. Extensor indicis muscle is labeled in purple. Like the extensor digiti minimi (i.e. [7] The extensor digitorum muscle (also known as extensor digitorum communis) is a muscle of the posterior forearm present in humans and other animals. Home; Books; Search; Support. During a routine dissection, we found two anatomical variants in the right forearm and hand of an 84-year-old male cadaver including the extensor indicis radialis and the extensor medii proprius associated with a fibromuscular slip. The extensor digitorum muscle (also known as extensor digitorum communis) is a muscle of the posterior forearm present in humans and other animals. [2] The extensor indicis lacks the juncturae tendinum interlinking the tendons of the extensor digitorum on the dorsal side of the hand. It exists as a single tendon most of the time. Extensor pollicis longus originates from the middle third of the posterior surface of ulna, mostly... Relations. Insertion: Attaches to the extensor hood of the index finger. ''Posterior'' refers to the back or back facing portion of something. Can J Plast Surg 2001;9(4):139-142. [3], The extensor indicis proprius does not show much variation. and hand, sheathed with the extensor digitorum tendon. Extensor Indicis. ANATOMY The brachioradialis (BR) and forearm extensor musculature originate in the lateral humeral epicondyle and the… This article incorporates text in the public domain from page 456 of the 20th edition of Gray's Anatomy (1918). Insertion: It attaches to the base of the proximal phalanx of the […] Copyright © 2016 - 2019 How To Relief. Origin. Posterior Interosseous Nerve (C7-C8) Clinical Significance. (Extensor indicis proprius visible going into second digit.). It is known that the extensor indicis proprius inserts to the index finger on the ulnar side of the extensor digitorum. Learn vocabulary, terms, and more with flashcards, games, and other study tools. B. Extensor Indicis Proprius (EIP) Instruct the patient “Point with your index finger with the rest of your hand in a fist” Insertion: extensor hood of index finger; Action: extension of MCP joints and IP joints of the index finger; Innervation: posterior interosseous branch of radial nerve Extensor Indicis. Transverse section across the wrist and digits. Origin: Ulna Insertion: Index finger (extensor hood) Nerve: Temporal branches of facial; Action: Tightens scalp. The extensor indicis originates in the lower back of the ulna, just beneath the extensor pollicis longus. EDC (Extensor Digitorum Profundus; radial) and EIP (Extensor Indicis Proprius; ulnar) + Posterior … Posterior surface of the forearm. A lesion that does not recover results in predictable wrist, finger, and thumb extensor deficits. [8], The extensor indicis extends the index finger, and by its continued action assists in extending (dorsiflexion) the wrist and the midcarpal joints. – Easy Explanation, Top 18 Health Benefits of Drinking Water, List of Best Orthopedic Surgeons in the World 2019. Anatomy Of The Extensor Indicis Muscle - Everything You Need To Know - Dr. Nabil Ebraheim - Duration: 4:46. nabil ebraheim 18,463 views. Extensor indicis opponensplasty: a modified evaluation system: AbstractBackgroundExtensor indicis opponensplasty is the gold standard treatment for the restoration of opposition in individuals with median nerve injuries, and it has excellent outcomes. Isolated Paralysis of the Extensor Pollicis Longus Muscle: A Further Variation of Posterior Interosseous Nerve Palsy May 2000 The Journal of Hand Surgery British & European Volume 25(2):225-6 The medial tendon (closer to the middle finger) is the extensor indicis tendon. Extensor Indicis. No variation was observed in the right side of extensor indicis muscle. One of the muscles attached to the interosseous membrane is the extensor indicis. [2] [5] [6] It is known that the extensor indicis proprius inserts to the index finger on the ulnar side of the extensor digitorum. Look at your index finger. The extensor carpi radialis brevis (ECRB) innervation may arise from the radial nerve or the PIN. How To Protect Your Eyes From Electronics Devices? - Extensor expansion of 2nd digit - Posterior interosseous nerve: C7,8 - Posterior interosseous artery: Extensor indicis - Extends 2nd digit - Weak wrist extension-posterior surface of ulna and interosseous membrane - Extensor expansion of 2nd digit - Posterior interosseous nerve: C7,8 - …

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