Spiral groove

Spiral groove

Situatoin: In the middle part of the lateral border of humerus, below and medial to the faint oblique ridge.
Direction: Downwards and forwards.
Importance:
1)      Spiral groove contains the radial nerve, which is liable to injury during fracture of the humerus.
2)      It also contans the profunda brachii artery & its branches.

3)      The medial head of triceps brachii arises from the smooth surface below the radial groove.

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