Step 7: Lower Forelimb Muscles

We found the Lower Forelimb to be one of the hardest areas to identify due to its delicate and thin muscles.

 The Brachioradialis is the thickest muscle in the lower forelimb and originates in the humerus, inserting into the radius and ulna.

The Extensor carpi radialis is next to the Brachiordialis and inserts in the metacarpal bones.
The Extensor digitorum communis is in between the Extensor carpi radialis and the Extensor digitorum lateralis and inserts on the digits.
The Extensor digitorum lateralis is next to the Extensor digitorum communis.
Helpful Hint: When isolating these muscles, it is easiest to start off by finding the large break that is located medially down the forearm. This break separates the Extensor digitorum communis and the Extensor digitorum lateralis. 


The Extensor carpi ulnaris is found next to the Lateralis and inserts on the metacarpal bones.