Chapter 8 pt 2: Head and Neck Flashcards Preview

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Flashcards in Chapter 8 pt 2: Head and Neck Deck (440)
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1

-a parasympathetic ganglion of CN III

-receives sensory fibers from the nasociliary (ophthalamic) nerve

ciliary ganglion

2

innervate sphincter pupillae muscles and the ciliary muscle

postganglionic fibers

3

pass through and innervate the eyeball

Sensory fibers from nasociliary

4

may pass through the ganglion and innervate dilator pupillae muscle

sympathetic fibers

5

occupies the anterior part of the orbit

globe shaped eyeball

6

divided into anterior and posterior chambers both are filled with aqueous humor

eyeball

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directly posterior to the cornea and anterior to the iris

anterior chamber

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posterior to the iris

posterior chamber

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-filled with vitreous humor
-posterior to the lens

postremal chamber

10

Made up of- choroid, ciliary body, iris

vascular layer

11

posterior, thin, highly vascular layer that is firmly attached to the retina

choroid

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Anterior to the border of the choroid made up of ciliary muscle and process

ciliary body

13

smooth muscle that decreases the size of the ring formed by ciliary body

ciliary muscle

14

longitudinal ridges projecting from the inner surface of the body

ciliary process

15

projects off ciliary body, smooth muscle fibers (sphincter pupillae and dilator pupillae muscles) control size of pupil

iris

16

-consists of optic part and nonvisual part
-inner layer of the eye

retina

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-part of retina
-posterior and lateral and is sensitive to light

optic part

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-part of retina
-covers the internal part of the ciliary body and iris

nonvisual part

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the junction between the optic part and nonvisual parts of retina

ora serrata

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what are the 3 parts of the ear?

-external
-middle
-internal

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separates the outer and middle ear

tympanic membrane

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where sound gets turned into an electrical impulse

inner ear

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what are the 2 parts of the external ear?

-auricle (pinna)
-external acoustic meatus

24

-helps capture sound and is composed of cartilage covered in skin
-The helix, concha, tragus, lobule, antitragus, and antihelix

auricle

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innervate the extrinsic and intrinsic muscles of the auricle

CN VII

26

innervated by the mandibular (V3) and the cervical plexus

outer more superficial surfaces of the auricle

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innervated by the vagus (X) and facial nerve (VII)

deeper parts sof auricle

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comes from the external carotid which supplies the posterior auricular, superficial temporal, and occipital artery

blood supply of auricle

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-Extends between the deepest part of the auricle to the tympanic membrane, about 1 inch (2.5 cm)

external acoustic meatus

30

Contains modified sweat glands that produce cerumen (ear wax)

external acoustic meatus