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Qtr 3 Head Anatomy Midterm
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What nerve runs through the stylomastoid foramen?
Facial nerve (VII)
What are the contents of the jugular foramen?
IJV
glossopharyngeal n.
Vagus n.
Accessory n.
Where does the internal carotid artery enter the cranium?
carotid canal
what nerves enter the internal acoustic meatus?
facial
vestibulocochlear
Where do the three branches of the trigeminal nerve exit the cranium?
Ophthalmic = superior orbital fissure
Maxillary = foramen rotundum
Mandibular = foramen ovale
: Standing Room Only
Where does the optic nerve exit the cranium?
Optic canal
What makes up the floor of the orbits?
orbital part of maxilla
zygomatic bone, palatine bone
What makes up the roof of the orbit?
Frontal bone
Small wing sphenoid
What makes up the medial orbits?
maxilla
lacrimal bone
ethmoid
body of sphenoid
What makes up the lateral wall of the orbit?
zygomatic bone
great wing of sphenoid
What are the three parts of the orbicularis oculi muscle and what innervates it?
Orbital part (forcibly closes eyelid)
Palpebral part (blinking)
Lacrimal part (dilates lacrimal sac)
All innervated by facial nerve VII
What are the two parts of the lacrimal gland and what is the innervation?
Orbital part
Palpebral part
Secretomotor = Facial nerve
Sensory = Trigeminal nerve
What is the origin of all rectus muscles of the eye?
Common tendinous ring
Which extraocular muscle does not insert into the sclera?
Levator palpebrae superioris
Insertion
: Superor tarus and upper lid
What makes up the uveal tract?
Choroid
Ciliary body
Iris
What are the main functions of the structures of the ear?
Protect
Conduct
Transduce
Amplify
What are the functions of the external auditory meatus?
Protection
Conduction
Which has more sodium or potassium the perilymph or endolymph?
perilymph = sodium
Endolymph = Potassium
P's dont go together
What part of the cochlea carries high and low frequencies respectively?
High = Base
Low = Apex
What does the utricle detect?
linear acceleration and gravity in horizontal plane
What does the saccule detect?
linear acceleration and gravity in vertical plane
What contains the cupula of the semicircular canals?
Crista ampullaris
What acts like the cupula in the utricle and saccule
Macula
What is the etiology of benign paroxysmal positional vertigo BPPV?
Otoliths become dislodged from vestibule and circulate the semi-circular canals (Posterior is most common)
What may vertical nystagmus indicate?
Stroke
Supraorbital, supratrochlear, lacrima, infratrochlear, and external nasal are all branches of what cranial nerve?
Ophthalmic division of trigeminal
Where do all fibers of the facial nerve pass out?
Internal auditory meatus
What does the motor branch of the facial nerve pass through?
Internal acoustic meatus
stylomastoid foramen
What are the motor divisions and branches of the facial nerve?
Temporofacial division
-Temporal branch
-Zygomatic branch
Cervicofacial division
-Buccal branch
-Marginal mandibular branch
-Cervical branch
What are the layers of the SCALP?
S
kin (hair follicles, sebaceous and sweat glands)
C
onnective tissue (blood vessels and nerves)
A
poneurotic (unites frontalis and occiptalis muscles)
L
oose connective tissue (subaponeurotic space can spread infection to intracranial sinuses)
P
ericranium (periosteum of skull)
Frontal belly of occipitofrontalis
Protracts scalp / raise eyebrows
Temporal branch of Facial nerve
Occipital belly of occipitofrontalis
retracts scalp / assists in raising eyebrows
posterior auricular nerve of CNVII
Corrugator supercilii
draws eyebrows down and medial
temporal branch CN VII
Procerus m.
wrinkles skin between eyebrows
Buccal branch CN VII
Nasalis
Transverse part - compresses nostrils
Alar part - dilates nostrils
Orbicularis oris
closes or purses lips
Buccal and marginal mandibular branch of CN VII
What muscles elevate the lip and what is their innervation?
Levator Labii superioris (also dilates nares)
Levator Labii superioris alaeque nasi (also elevates ala of nose)
Zygomaticus minor
Zygomaticus major (up and back)
All innervated by buccal branch CN VII
Risorius m (joker muscle)
Retracts angle of mouth
Buccal branch
Depressor labii inferioris
depresses lower lip
marginal mandibular branch
Depressor anguli oris
depresses angle of mouth
marginal mandibular branch
Mentalis m.
Elevates and protrudes lower lip
marginal mandibular b.
Buccinator m.
compresses cheek
Buccal branch
Platysma m.
depresses mandible and angle of mouth
Cervical branch of Facial nerve
Author
bradley.knox
ID
217092
Card Set
Qtr 3 Head Anatomy Midterm
Description
foramen, auditory, vision, face muscles
Updated
5/1/2013, 9:44:57 PM
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