The helix is the curved outer rim of the auricle, running from just above the ear canal up and around to the earlobe. It is made of folded elastic cartilage covered by thin skin.
| Location | Outer margin of the auricle |
|---|---|
| Parts |
|
| Nerve Supply | Great auricular nerve; Auriculotemporal nerve; Lesser occipital nerve; Auricular branch of the vagus nerve |
| Blood Supply | Posterior auricular artery; Anterior auricular branches of the superficial temporal artery |
Helps funnel sound into the ear canal and aids sound localisation.
The helix is very exposed to sun and is a common site for skin cancers. Its cartilage is often pierced, and infection can cause perichondritis. Frostbite also affects the rim first.
A painful nodule on the helix, typically worse when sleeping on that side.
Infection of the cartilage lining after piercing or injury.
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