Extensor indicis muscle

Extensor indicis proprius
Transverse section across distal ends of radius and ulna. (Label "Ext. indic. prop." visible at bottom center.)
Posterior surface of the left forearm. Deep muscles. Extensor indicis muscle is labeled in purple.
Details
Origin	Posterior distal third of ulna and interosseous membrane
Insertion	Index finger (extensor hood)
Artery	Posterior interosseous artery
Nerve	Posterior interosseous nerve
Actions	Extends index finger, wrist
Identifiers
Latin	musculus extensor indicis
TA98	A04.6.02.052
TA2	2515
FMA	38524
Anatomical terms of muscle [edit on Wikidata]

In human anatomy, the extensor indicis (proprius) is a narrow, elongated skeletal muscle in the deep layer of the dorsal forearm, placed medial to, and parallel with, the extensor pollicis longus. Its tendon goes to the index finger, which it extends.