Anatom3DMedial head of triceps brachii
Caput mediale musculi tricipitis brachii · Vnitřní hlava trojhlavého svalu pažního
Muscles
Looks like
The deep head of the triceps, starting from the back of the upper arm bone below the radial nerve groove.
What it does
Straightens the elbow in everyday, low-effort movements.
Keeping it well
Rarely injured alone; triceps tendon tears are rare but need early surgery.