Intrinsic muscles

INTRINSIC MUSCLE

Scuto-auricularis externus

  • Origin: The outer face of the scutiform cartilage.
  • Insertion: Medial part of the base of concha.
  • Action: To prick the ear.

Scuto-auricularis internus

  • Origin: Internal face of the scutiform cartilage,
  • Insertion: Anterior aspect of the Concha.
  • Action: To prick the ear,
  • Blood supply: External carotid, superficial temporal arteries and a small branch from the occipital artery.
  • Nerve supply: Facial nerve, first and second spinal nerves.
Last modified: Saturday, 15 October 2011, 8:40 AM