Pass, Fail, Pass, Fail for Anterior Forearm

So a lot of people use the mnemonic ‘pass, fail, pass, fail’ to remember the anterior forearm muscles.

Remember all come from the medial epicondyle. So put you thumb on your medial epicondyle and then fan your fingers out across your anterior forearm so your index finger is on your radius and pinky is on your ulna. Then say pass, fail, pass, fail while tapping each finger for each word.

First PASS (your index finger), is your pronator teres. The position of your index finger might be a little misleading. The pronator is deep to the flexor carpi radialis, so you need to push that out of the way to see that when dissecting.

First FAIL (your middle finger), is really 2 f’s;  your flexor carpi radialis and the flexor pollicis longus. This wraps around the radius and has a HUGE tendon. It is just lateral to the flexor digitorum profundus.  The radial nerve and artery are sandwiched between these 2 muscles.

Second PASS (your ring finger), is your palmaris longus (this is not present in everyone. I only have one. It can be missing unilaterally or bilaterally)

Second FAIL (your pinky finger), is really 3 f’s; your flexor digitorum superificialis, flexor digitorum profundus, and flexor carpi ulnaris. The median nerve lies and brachial artery bifurcation takes place between the flexor digitorum muscles. The ulnar nerve and artery are sandwiched between the flexor digitorum profundus and flexor carpi ulnaris.

(And don’t forget the pronator quandratus…also doesn’t fit in the mnemonic) (this video has both upper and anterior forearm muscles. Its a great video)


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