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Internal acoustic meatus: magnified reference view with a numbered learning marker. The complete original plate is available in the next view.
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Internal acoustic meatus

Opening on posterior surface of petrous temporal bone. Faces the posterior cranial fossa. Different from the external ear canal.

Zoom in, then drag to inspect. Keyboard: + / − to zoom, arrows to pan, 0 to reset. Tap the numbered markers to explore parts.

Internal acoustic meatus: magnified reference view with a numbered learning marker. The complete original plate is available in the next view.

Image: OpenStax College / university open textbook · Source / original · CC BY 4.0

Numbered markers and focused views are Mediveerse learning overlays; the original reference is linked above.

Internal acoustic meatus

Foramina & canals

Internal acoustic meatus

STRUCTURE & FUNCTION

Understand what you see.

Opening on posterior surface of petrous temporal bone.

Zoom into the original labels. Practise pointing out each structure, then explain it aloud. Diagrams are teaching references; specimen appearance and slide staining vary.

01 / IDENTIFICATION

How to recognise it.

  1. Opening on posterior surface of petrous temporal bone
  2. Faces the posterior cranial fossa
  3. Different from the external ear canal
02 / KEY STRUCTURES

Point them out.

Tap a number to open its reference, zoom in and locate the structure. Numbers stay the same across views. This key follows landmarks visible in the reference images.

Related features & study points (3)

Additional relations, attachments or microscopic details to revise alongside this plate. These are separate from its numbered image landmarks.

  • Petrous temporal bone
  • Facial nerve
  • Vestibulocochlear nerve
03 / VIVA PRACTICE

Think first. Then reveal.

Say your answer aloud before opening the suggested response.

Examiner-style prompts: identify the structure, explain its relations, then answer the applied follow-up. These are revision questions, not authenticated past papers.

01Identify internal acoustic meatus and justify your identification.
SUGGESTED ANSWER

Opening on posterior surface of petrous temporal bone. Faces the posterior cranial fossa. Different from the external ear canal.

02What are its main neural contents?
SUGGESTED ANSWER

Facial VII and vestibulocochlear VIII.

03Where does VII leave the skull?
SUGGESTED ANSWER

After traversing the facial canal, VII exits through the stylomastoid foramen.

Read the references.

Credited anatomical plates, microscopy and university teaching references. Individual image credits appear below the viewer. Historical plates can use older terminology; use the lesson text for current names.