yogabook / muscles / hand/forearm dorsal / extensor indicis
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M. extensor indicis (proprius)
extensor of the index finger arising in the forearm
Origin: distal third of the facies dorsalis ulnae, interosseous membrane
Insertion: base of the distal phalanx of the index finger
Antagonists:
Movement: extension in all index finger joints, dorsiflexion of the wrist