Extensor Indicis

Origin: Posterior surface of the Ulna and the interosseous membrane

Insertion: dorsal base of the index finger Middle Phalanx and the Digital extensor mechanism

Function: extends the index finger MCP and PIP joints

Nerve: Posterior Interosseous

Artery: Posterior Interosseous

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Links to this page: Alphabetical Muscle Index | Brachial Plexus Lower Trunk Posterior Division | Brachial Plexus Lower Trunk | Brachial Plexus Middle Trunk Posterior Division | Brachial Plexus Middle Trunk | Brachial Plexus Posterior Cord | C7 Root Shared Muscle Innervation | C7, C8 roots | C8 Root Shared Muscle Innervation | Dorsal Forearm muscles: Deep Group | Extensor Indicis Tendons | Index Distal Interphalangeal Joint | Muscles Innervated by the Posterior Interosseous Nerve | Muscles which produce interphalangeal joint extension | Muscles which produce MCP joint extension | Nerve route to Extensor Indicis | Phalangeal joint Movement MCP, PIP, DIP, IP | Ulna | Distal Forearm Cross Sectional Anatomy |