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Bassett Collection of Stereoscopic Images of Human Anatomy

Dissection of ear from lateral aspect

Petrotympanic fissure; relation of cartilaginous part of left external auditory meatus to tympanic part of temporal bone

Image #60-2

KEYWORDS: Bones cartilage joints, Brain, Diencephalon, Ear.

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Dissection of ear from lateral aspect
Petrotympanic fissure; relation of cartilaginous part of left external auditory meatus to tympanic part of temporal bone
The capsule of the temporomandibular articulation has been removed. The tympanic ring produces a noticeable bulge of the bone lateral to the petrotympanic fissure. The squamous part of the temporal bone has been cut away and the cerebral hemisphere removed. The brain stem is visible in the background.
  1. Tympanosquamous fissure
  2. Petrotympanic fissure
  3. Elevation at site of tympanic annulus
  4. Temporal bone (squamous part)
  5. Middle meningeal artery within foramen spinosum
  6. Sphenosquamous suture
  7. Mandibular nerve (V) in foramen ovale
  8. Masseteric nerve
  9. Upper pointer: Angular spine Lower pointer: Alar fascia
  10. Auriculotemporal nerve
  11. Internal maxillary nerve plexus
  12. Internal maxillary artery
  13. Lingual nerve
  14. Inferior alveolar nerve
  15. Ceruminous gland
  16. Mastoid cells
  17. External acoustic meatus
  18. Upper pointer: Cartilaginous acoustic meatus Lower pointer: Incisure of external cartilaginous acoustic meatus
  19. Facial nerve (VII) at exit from stylomastoid foramen
  20. Styloid process
  21. Posterior auricular nerve (displaced)
  22. Superficial temporal artery
  23. Lymph node
  24. Digastric muscle
  25. Posterior auricular artery