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49 Cards in this Set
- Front
- Back
Masseter
OIAI |
O: zygomatic arch/bone - maxillary process - inferior border and medial surface
I: mandible - ramus - angle and lateral surface A: elevation of mandible; can produce lateral movement/grinding INV: massteric nerve (branch of mandibular, V3) |
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Temporalis
OIAI |
O: temporal fossa - floor; temporal fascia - deep surf
I: mandible - coronoid process - tip and medial surface; ramus - ant border A: ant./vert. fibers - elevate mandible post./horiz. fibers - retract mandible, move post. INV: deep temporal n. (branch of mandibular, V3) |
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Boundaries of infratemporal region
-anterior -lateral -medial -roof |
Ant: body of maxilla
Lat: ramus of mandible Med: Lateral plate of pterygoid process Roof: flat, under surface of greater wing of sphenoid, includes foramina spinosum and ovale |
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Contents of pterygopalatine fossa
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pterygopalatine ganglion and third part of maxillary a.
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Contents of infratemporal fossa
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pterygoid muscles, much of maxillary a., pterygoid plexus (venous), and several nerves
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medial pterygoid m.
OIAI |
O: 1. lateral pterygoid plate - medial surface; palatine bone - pyramidal process; 2. maxilla - tuberosity
I: mandible - ramus - med surf - inf to mandibular foramen A: elevates mandible with masseter; contributes to protrusion; alternate unilateral activity produces smaller grinding movements INV: Ant trunk of mandibular n., V3; via medial pterygoid n. |
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lateral pterygoid m.
OIAI |
O: 1. sphenoid - greater wing - infratemporal surface and crest; 2. lateral pterygoid plate - lateral surface
I: (upper head) TMJ - joint capsule and articular disc; (inf. head) mandible - condyloid process - neck - anteromedial aspect - pterygoid fovea A: (bilaterally) protracts mandible and depresses chin; (unilaterally) swings jaw toward contralateral side; (alternate unilateral contraction) larger lateral chewing movements INV: ant. trunk of mandibular n., V3, via lateral pterygoid n. |
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mandibular nerve enters infratemporal fossa via
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foramen ovale
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divisions of mandibular nerve/trunk
branches of mandibular nerve/trunk |
ant. (motor)
post. (sensory) meningeal n. and n. to medial pterygoid m. |
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branches of ant. division of mandibular n.
branches of post. division |
masseteric, deep timporal, buccal (sensory), and n. to lateral pterygoid m.
auriculotemporal, lingual, and inf. alveolar nn. |
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Mastication muscles supplied by which artery
important branches include |
maxillary a.
middle meningeal a., inf. alveolar a., sphenopalatine a. |
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Vein(s) that drain in correspondence to maxillary a.
-has important connections with |
pterygoid plexus
1. cavernous sinus (via foramen ovale) 2. facial vein (via deep facial v) 3. pharyngeal plexus of veins |
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Otic ganglion is para- or sympathetic?
relay station for preganglionic fibers of ___________ n. destined for parotid gland? |
relay station for preganglionic parasympathetic biers of glossopharyngeal n. (CN IX) destined for parotid gland.
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Articular disc is arranged
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As a cap on the mandible, projecting forward under the articular tubercle
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Implication of an articular disc
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two types/planes of movement - one on each side of disc
-lower joint cavity: simple hinge movements, depression and elevation of mandible -upper joint cavity: gliding movements, protrusion and retraction of mandible |
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Lateral movements of the muscles of mastication are perfomed by
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ipsilateral temporalis and masseter and contralateral medial pterygoid
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outer fibrous layer of eyeball (post. 5/6)
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sclera
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transparent, ant. 1/6 of fibrous layer of eyeball
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cornea
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components of middle vascular layer of eye
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choroid, ciliary body, and iris
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inner layer (retina) of eye contains
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sensory receptors (rods and cones) for light
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accommodation
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change the shape of the lens, is essential for focusing light rays, coming from different distances, on the retina
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fluid/aqueous humor is recycled how often?
it is produced where? enters other chamber via |
all the time
post chamber pupil |
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what absorbs aqueous humor?
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veins in cornea
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If problem with recycling of fluid (aqueous humor) and it accumulates excessively
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glaucoma develops
increases pressure in eye |
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lens is suspended by
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tiny ligaments which are attached to the ciliary muscle
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contraction of the ciliary muscle results in
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accommodation of the lens
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ciliary muscle is supplied by (symp./parasymp.) motor fibers in _____ nerve
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parasympathetic fibers in CN III
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the iris contains two smooth muscles which
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regulate the size of the pupil
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contraction of dilator pupillae results in
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smaller pupil
(pupillary contraction) |
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dilator pupillae is supplied by (post-/pre-ganglionic) (symp./para-symp.) motor fibers from
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postganglionic sympathetic motor fibers from carotid plexus
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the blind spot of the retina occurs where _________ is attached and contains no _______________, but does contain ________________
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where optic nerve is attached
contains no rods or cones, but includes central artery of retina (only one to eye) |
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changes in blind spot can indicate increase in intracranial pressure because
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optic n. is surrounded by meninges, which can affect central artery of retina, which is located within the optic n.
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macula
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portion of the retina which has the highest concentration of cones (color vision) and the sharpest vision
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sup. rectus
A/I |
elevates
supplied by CN III, oculomotor |
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lat. rectus
A/I |
abducts
supplied by CN VI, abducens |
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med. rectus
A/I |
adducts
CN III, oculomotor |
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inf. rectus
A/I |
depresses
CN III, oculomotor |
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sup. oblique
A/I |
depresses and abducts
CN IV, trochlear |
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inf. oblique
A/I |
elevates and abducts
CN III, oculomotor |
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Levator palpebrae superioris
AI |
elevates eyelid
CN III, oculomotor - deep layer (superior tarsal muscle) is supplied by sympathetic fibers |
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Inferior part of levator palpebrae superioris is called
consists of (skeletal/smooth) muscle fibers insert into |
superior tarsal muscle
smooth muscle fibers insert into tarsal plate |
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Involuntary muscle fibers of superior tarsal muscle are innervated by
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post ganglionic sympathetic fibers, part of carotid plexus
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ptosis is
ptosis is a sign of |
drooping of upper eyelid
cervical sympathetic trunk injury (i.e. via lesion of cervical sympathetic chain ganglia |
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ptosis is part of a condition known as
it affects what muscle(s) |
Horner's syndrome
superior tarsal muscle(s) |
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Contents of orbit receive blood supply from
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opthalmic a. and its branches
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Opthalmic artery is a branch of _____________ artery
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internal carotid a. in cranial cavity
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Within orbit _________________________, a branch of opthalmic a., enters optic nerve to become sole blood supply of retina
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central artery of retina
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contents of orbit are drained by
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opthalmic vein, including superior opthalmic veins
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significance of opthalmic v., especially superior opthalmic v.?
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connection
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