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Flashcards in Bits & Pieces Deck (6)
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1

What seperates the ethmoid air cells from the orbit?

Lamina Papyracea or Orbital Lamina
Its the lateral bony plate of the ethmoid bone seperating the air cells from the orbit

2

Which part of the facial nerve innervates bilaterally?

The part to the forehead

3

Describe the arrangement of nerves in the IAM?

Split into 4 quadrants:
- Post-Inf = Inferior Vestibular
- Post-Sup = Superior Vestibular
- Ant-Inf = Cochlear
- Ant- Sup = Facial

(7up Coke Down = VII nerve superior and Cochlear nerve inf)

4

Describe the structure of the cochlea:

Scala Tympani (Tympanic Duct) runs around the Scala Media (cochlear Duct) which contains the Organ of corti on which the hair cells are found.

ST = Perilymph
SC = Endolymph

5

Describe the semi-circular Canals:

Three:
- Sup/Ant (Vertical in the Sagittal Plane so nodding/tipping head)
- Post (Coronal Plane)
- Lateral (Transverse plane so does turning of head)

These orientations are not very precise

6

Which end of the cochlea is high frequency sound detected at?

Basal turn i.e. closer to the Oval window.

(So does that mean low Frequency sounds travel further round?)