With the palm down on the table, raise the second finger off the table. This requires a contraction of which muscle?

The action of lifting your second finger while your palm is down involves the contraction of the Extensor Digitorum muscle. This muscle is located in the posterior compartment of the forearm and is responsible for the extension of the fingers and the wrist.

Here are the steps:

1. The brain sends a signal through the nervous system to the Extensor Digitorum muscle in your forearm.
2. This signal triggers the muscle fibers in the Extensor Digitorum to contract.
3. The contraction of these muscle fibers pulls on the tendons connected to the second finger.
4. This pulling action causes the second finger to lift off the table.