Special Senses Check off Flashcards
1
Q
External Auditory Canal
A
2
Q
Suspensory Ligaments
A
3
Q
Cerumen
A
Earwax
4
Q
Choroid Layer
Iris
A
5
Q
Ora seratta
A
6
Q
Anterior (aqueous) chamber
A
7
Q
Hearing Pathway?
A
Sound Produced
- Goes in Pinna
- into External Auditory Canal
- Vibrates the Tympanic membrane, connected to ossicles causing
- Malleus vibrates then
- Incus vibrates then
- Stapes vibrates against the
- Oval window of the Cochlea which
- vibrates Perilymph in the Scala Vestibuli casuing the
-
Vestibular Membrane to vibrate
10a. Vibrations also travel in the Vestibular Duct to the apex of the cochlea (go to step 15)
10b. which causes the Endolymph of Cochlear duct to vibrate which
11a. vibrates the Basilar Membrane, moving hair cells of
12a. the Organ of Corti against Techotial membane
13a. Hair cells synpase with Spiral Ganglian, sending signals to
14a. the Cochlear Branch of the Vestibular Nerve
10b. Vibrations also travel in the Vestibular Duct to the apex of the cochlea - Sound from the apex of the cochlea and vestibular nerve transmitted to Perilymph of Scala Tympani
- Sound enrgy then dissipated through Round Window into air in the middle ear cavity.
8
Q
Conjunctiva
A
9
Q
Choroid Layer
Pupil
A
10
Q
Semicircular Canals
A
11
Q
Visual Pathway
A
Light goes to
- Cornea, then to
- Aqueous Humor, then to
- Lens, then to
- Vitreous Humor then to
then passes through two layer of transparent cells in the retina
- Ganglion Cells then to
- Bipolar Cell Layer which stimulates
- Rods and Cones, creating action potentials (go to 9)
- light is abosrbed at Pigmented Epithelium at the retina and the underlying choroid layer (middle layer in wall of eye)
- Action potenitals go from Rods and Cones to
- Bipolar layer then to
- Ganglian cells who leave the retina at the Optic disc (blind spot) this becomes the
- Optic Nerve whcih crosses at the optic chiasm and becomes the
- Optic Tract which goes to to the
- Thalamus, which sends info to Occipital Lobe
12
Q
Vestibullar Nerve
A
13
Q
Tympanic Membrane
A
14
Q
Eastachian Tube
A
15
Q
ossicles: Stapes
A
16
Q
Chochlea
A
17
Q
Where is the round window?
A
End of the cochlea
18
Q
Oval Window
A
19
Q
Optic Nerve
A
20
Q
Lacrimal Sac
A
21
Q
Choroid Layer
A
22
Q
Cochlear nerve (branch)
A
23
Q
Posterior (vitreous) chamber
A
24
Q
Ciliary Body
Ciliary Muscles
A
25
Q
Fibrous Layer
Sclera
A
26
Q
Fibrous Layer
Cornea
A
27
Q
Macular Lutea
A
28
Q
ossicles: Malleous
A
29
Q
Lens
A
30
Q
Pinna
A
31
Q
Ciliary Body
A
32
Q
ossicles: Incus
A
33
Q
Fovea Centralis
A
34
Q
Optic Disk
A
35
Q
Retina
A
36
Q
Medial Canthus
A
