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L i s te n to T h e A B M P Po d c a s t a t a b m p.co m /p o d c a s t s o r w h e reve r yo u a cce s s yo u r favo r i te p o d c a s t s 99 More Cool Muscles Confessions of an Anatomy Geek By Dr. Joe Muscolino Extensor carpi radialis longus (ECRL) and extensor carpi radialis brevis (ECRB): They extend the wrist joint, but they fl ex the elbow joint. 10 10. EXTENSOR CARPI RADIALIS LONGUS AND EXTENSOR CARPI RADIALIS BREVIS The extensor carpi radialis longus (ECRL) and extensor carpi radialis brevis (ECRB) are cool because even though these extensors cross the wrist joint posteriorly, they actually cross the elbow joint anteriorly as part of the radial group of muscles (along with the brachioradialis), so they ex the elbow joint. This is where close attention to the name of a muscle matters. Extensor carpi means "extension of the wrist," but it does not necessarily mean they are also extensors of the elbow joint. This distinction matters when we are engaging the muscles during palpation assessment, and also when we look to stretch the muscles. The ECRB is also important because it is one of the principal muscles involved with tennis elbow (lateral elbow tendinopathy). Anyone who knows this anatomy geek knows I couldn't possibly end my "cool muscles" list at just nine. So, while you can read about the fi rst nine muscles on my VIP list starting on page 56, here are the remaining 11 muscles I have pegged as the coolest muscles. Brachioradialis ECRL ECRB