The extensor indicis is a slender muscle in the forearm that extends the index finger independently of the others. It aids in finger extension and fine motor control, especially during pointing or isolated index finger movements. It also assists in extending the wrist when the hand is in use.
Etymology:
The name comes from Latin: extensor means "stretcher," and indicis refers to the index finger (index in Latin), highlighting its role in extending the index finger.
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