Test 3 - Special Senses Flashcards
What are the 3 Superior facial mm you need to know?
Proceeds
Nasalis
Levator labii superioris alaeque nasi
What cartilages are on the nose?
Lat cartilage
Septal cartilage
Alar cartilage
3 conchae and 3 meatuses?
Sup, mid, inf for both.
Meatuses lay below respective conchae
What are the major sources of blood for the LATERAL nasal cavity? (3)
ICA - Ophthalmic - ethmoidal aa. (Ant and post)
ECA - Maxillary - Sphenopalatine - Lat Post Nasal aa.
What are the major sources of blood to the nasal septum?
ICA - ophthalmic - Ethmoidal aa - ant septal bb.
ECA - Maxillary - sphenopalatine - Post septal bb.
- Facial - septal branch of superior labial a.
What plexus is in the anteroinferior portion of the nose?
Kiesselbach’s plexus
*Nose bleeds
What is the innervation to the nasal cavity and septum?
V1 - Ant nasal septum and cavity
-> Ant ethmoidal nerve
V2 - Rest of the nasal septum and cavity
->Nasopalatine (sphenopalatine) via sphenopalatine foramen
*ALSO, CN I
Tears take what route?
Lacrimal gland
Sup/Inf puncta
Sup/Inf lacrimal canaliculi
Lacrimal sac
Nasolacrimal duct
Drains below the concha
What are the 4 sinuses?
Frontal
Ethmoid (Air cells)
Maxillary
Sphenoid
What sinuses drain into the middle meatus?
Frontal
Ethmoid
Maxillary
What does the ethmoid sinus drain into?
Sphenoethmoidal recess
What drains tears?
Lacrimal duct
What drains the ear?
Pharyngeal orfice of auditory tube
4 parts of the external ear?
Helix
Lobule
Travis
Ext acoustic meatus
What does sensory of the superoanterior ear?
Auriculotemporal
What does sensory of posterior ear?
Lesser occipital
What does sensory inferior to the ear?
Great auricular
On the actual auricle, what is doing sensory? (2 CNs)
VII
X
What does sensory to tympanic membrane?
Outer - X
Inner - IX
What does sensory to middle ear?
CN IX
*With some CN VII
What vasculates middle ear?
Branches of maxillary artery
- Ant Tympanic
- Deep auricular
What are the ossicles?
Malleus
Incus
Stapes
- Stapes pushes on what?
- Oval window
- Malleus is on what?
- Tympanic membrane
What is in the internal ear?
What nerve is major here?
Cochlea
Semicircular canals
CN VIII
What are the three major external ear muscles?
What innervates them?
What artery supplies them?
Auricularis ant
Auricularis sup
Auricularis post
CN VII (Facial expression)
Sup temp, post auricular, etc.
What muscles closes the eye?
Orbicularis oculi
CN VII
What two muscles act on the eyelid?
Levator palpebrae superioris m
-CN III
Sup tarsal m
-Sympathetics from T1 spinal cord
—Pregang - T1
—Postgang - Sup cerv gang
3 major layers of the eyeball.
Sclera/cornea
Choroid layer
Retina
What is sensory to the cornea?
V1
*Cornea is clear bulb in ant eye
What is in the choroid layer?
Ciliary m
—Lens
Iris - Colored part
What does the ciliary muscle do?
When the MUSCLE is relaxed, the suspensory ligaments are TIGHT and the lens is flat
—This is for looking at the mountains
When the MUSCLE contracts, the suspensory ligaments are LOOSE and the lens is fat
—This is for reading a book
Ciliary muscle, symp or parasymp?
PARASYMP
The sphincter pupillae muscle does what?
Parasymp or symp?
What nerve?
Constricts the pupil
Parasymp
CN III
Which reflex uses only sphincter pupillae?
Pupillary light reflex
Which reflex uses both the sphincter pupillae and the ciliary muscle?
Accommodation (lens reshaping for looking at things of different distances)
Both the ciliary muscle and sphincter pupillae muscle use what route to get to the eye?
Accessory oculomotor nucleus to ciliary ganglion to eye
The dilator pupillae muscle does what?
What response?
Dilates the pupil
Sympathetic
What other muscle of the eye is sympathetically innervated?
Superior tarsal muscle
What is Horner’s syndrome?
Lack of sympathetic innervation to the head
What are the symptoms of Horner’s syndrome?
Ptosis - droopy eyelid
Anhydrosis - decreased sweating
Miosis - constricted pupil
**PAM (Ptosis, Anhydrosis, Miosis) has Horn’s
What on the retina gives the point of highest acuity?
Fovea centralis
T/F - The pupillary reflex is a consensual reflex.
TRUE
*Utilizes the Edinger-Westphal nucleus (parasymp)
What does LR6SO4R3 mean?
Lat rectus - CN 6
Sup oblique - CN 4
Rest - CN 3
Know the anatomical actions.
Lat rectus (6) - Lateral
Med rectus (3) - Medial
Sup rectus (3) - Sup and medial
Inf rectus (3) - Inf and medial
Sup oblique (4) - INF and LAT
Inf oblique (3) - SUP and LAT
Ophthalmic a comes off what?
And what are its branches?
ICA
-Lacrimal
-Frontal (Supratrochlear)
—Ant ethmoid
—Post ethmoid
-Supraorbital
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