Flashcards in Test 3 - Special Senses Deck (46):
What are the 3 Superior facial mm you need to know?
Levator labii superioris alaeque nasi
What cartilages are on the nose?
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?
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?
Sup/Inf lacrimal canaliculi
Drains below the concha
What are the 4 sinuses?
Ethmoid (Air cells)
What sinuses drain into the middle meatus?
What does the ethmoid sinus drain into?
What drains tears?
What drains the ear?
Pharyngeal orfice of auditory tube
4 parts of the external ear?
Ext acoustic meatus
What does sensory of the superoanterior ear?
What does sensory of posterior ear?
What does sensory inferior to the ear?
On the actual auricle, what is doing sensory? (2 CNs)
What does sensory to tympanic membrane?
Outer - X
Inner - IX
What does sensory to middle ear?
*With some CN VII
What vasculates middle ear?
Branches of maxillary artery
What are the ossicles?
*Stapes pushes on what?
*Malleus is on what?
What is in the internal ear?
What nerve is major here?
What are the three major external ear muscles?
What innervates them?
What artery supplies them?
CN VII (Facial expression)
Sup temp, post auricular, etc.
What muscles closes the eye?
What two muscles act on the eyelid?
Levator palpebrae superioris m
Sup tarsal m
-Sympathetics from T1 spinal cord
—Pregang - T1
—Postgang - Sup cerv gang
3 major layers of the eyeball.
What is sensory to the cornea?
*Cornea is clear bulb in ant eye
What is in the choroid layer?
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?
The sphincter pupillae muscle does what?
Parasymp or symp?
Constricts the pupil
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?
Dilates the pupil
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?
T/F - The pupillary reflex is a consensual reflex.
*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?
DRAW THE BRACHIAL PLEXUS!