BrachioRadialis Function: Its the Beer Raising muscle, flexes elbow, strongest when wrist is oriented like holding a beer.Innervation: Breaks Rule: it’s a flexor muscle But Radial. (Radial nerve usually is for extensors: Recall BEST rule: B was for brachioradialis).Important relation: Behind it is the Radial nerve in the cubital fossa.Attachment: Attaches to Bottom of Radius.