14 Questions
What is the blood supply for the external auricle (pinna)?
Superficial temporal and posterior auricular arteries
Which nerve provides sensory innervation to the external auricle (pinna)?
Great auricular nerve (C2-C3) and auriculotemporal nerve (CN 5)
What is the composition of the lateral 1/3 of the external auditory meatus?
Cartilaginous and lined by hair-lined skin with ceruminous glands
What is the function of the pinna in the ear?
To funnel sound waves from the ambience into the canal
What is the diameter of the tympanic membrane (eardrum)?
1 cm
What is the composition of the margin of the tympanic membrane?
Fibrocartilaginous ring
What is the floor of the middle ear lined by?
Mucous membrane
What forms the lateral wall of the middle ear?
Membranous wall
What constitutes the boundaries of the middle ear?
Tegmental wall, labyrinthine wall, jugular wall, mastoid wall
Which part of the cranium forms a partition in the skull?
Dura mater
What is the function of the falx cerebri?
Extend in the midline from crista galli to the internal occipital protuberance
Which layer of the meninges forms delicate reticular fibers?
Arachnoid
What is the shape of the diaphragma sellae?
Crescent-shaped
Which part of the cranium separates the two cerebellar hemispheres?
Falx cerebelli
Test your knowledge of the anatomy of the external ear with this quiz. Explore the auricle/pinna and the external auditory meatus/ear canal, including their blood supply and nerve innervation.
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