Anatomy

Embryology of the ear

  • Derived from 1st Pharyngeal Groove:
    • External Auditory Meatus
  • Derived from 1st Pharyngeal Arch:
    • Auricle or Pinna
    • Malleus and Incus
  • Derived from 2nd Pharyngeal Arch:
    • Stapes Suprastructure
    • Stapes Footplate and Annular Ligament
  • Derived from 1st Pharyngeal Pouch:
    • Tympanic Cavity
    • Eustachian Tube
  • Derived from All 3 Germ Layers:
    • Tympanic Membrane
  • Derived from Otic Capsule:
    • Membranous Labyrinth
  • Derived from Otic Vesicle (Pars Superior):
    • Semicircular Canals and Utricle
  • Derived from Otic Vesicle (Pars Inferior):
    • Saccule and Cochlea
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