Anatom3DHumeral head of pronator teres
Caput humerale musculi pronatoris teretis · Pažní hlava oblého pronátoru
Muscles
Looks like
The larger head of pronator teres, starting from the inner elbow bump.
What it does
Turns the palm down and helps bend the elbow.
Keeping it well
The median nerve passes between its two heads; aching forearm with numb fingers may be pronator syndrome.