Anatomy Lecture Exam 3

Front 1

Masseter
OIAI

Back 1

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)

Front 2

Temporalis
OIAI

Back 2

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)

Front 3

Boundaries of infratemporal region
-anterior
-lateral
-medial
-roof

Back 3

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

Front 4

Contents of pterygopalatine fossa

Back 4

pterygopalatine ganglion and third part of maxillary a.

Front 5

Contents of infratemporal fossa

Back 5

pterygoid muscles, much of maxillary a., pterygoid plexus (venous), and several nerves

Front 6

medial pterygoid m.
OIAI

Back 6

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.

Front 7

lateral pterygoid m.
OIAI

Back 7

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.

Front 8

mandibular nerve enters infratemporal fossa via

Back 8

foramen ovale

Front 9

divisions of mandibular nerve/trunk


branches of mandibular nerve/trunk

Back 9

ant. (motor)
post. (sensory)

meningeal n. and n. to medial pterygoid m.

Front 10

branches of ant. division of mandibular n.


branches of post. division

Back 10

masseteric, deep timporal, buccal (sensory), and n. to lateral pterygoid m.

auriculotemporal, lingual, and inf. alveolar nn.

Front 11

Mastication muscles supplied by which artery

important branches include

Back 11

maxillary a.

middle meningeal a., inf. alveolar a., sphenopalatine a.

Front 12

Vein(s) that drain in correspondence to maxillary a.

-has important connections with

Back 12

pterygoid plexus

1. cavernous sinus (via foramen ovale)
2. facial vein (via deep facial v)
3. pharyngeal plexus of veins

Front 13

Otic ganglion is para- or sympathetic?
relay station for preganglionic fibers of ___________ n. destined for parotid gland?

Back 13

relay station for preganglionic parasympathetic biers of glossopharyngeal n. (CN IX) destined for parotid gland.

Front 14

Articular disc is arranged

Back 14

As a cap on the mandible, projecting forward under the articular tubercle

Front 15

Implication of an articular disc

Back 15

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

Front 16

Lateral movements of the muscles of mastication are perfomed by

Back 16

ipsilateral temporalis and masseter and contralateral medial pterygoid

Front 17

outer fibrous layer of eyeball (post. 5/6)

Back 17

sclera

Front 18

transparent, ant. 1/6 of fibrous layer of eyeball

Back 18

cornea

Front 19

components of middle vascular layer of eye

Back 19

choroid, ciliary body, and iris

Front 20

inner layer (retina) of eye contains

Back 20

sensory receptors (rods and cones) for light

Front 21

accommodation

Back 21

change the shape of the lens, is essential for focusing light rays, coming from different distances, on the retina

Front 22

fluid/aqueous humor is recycled how often?

it is produced where?

enters other chamber via

Back 22

all the time

post chamber

pupil

Front 23

what absorbs aqueous humor?

Back 23

veins in cornea

Front 24

If problem with recycling of fluid (aqueous humor) and it accumulates excessively

Back 24

glaucoma develops
increases pressure in eye

Front 25

lens is suspended by

Back 25

tiny ligaments which are attached to the ciliary muscle

Front 26

contraction of the ciliary muscle results in

Back 26

accommodation of the lens

Front 27

ciliary muscle is supplied by (symp./parasymp.) motor fibers in _____ nerve

Back 27

parasympathetic fibers in CN III

Front 28

the iris contains two smooth muscles which

Back 28

regulate the size of the pupil

Front 29

contraction of dilator pupillae results in

Back 29

smaller pupil
(pupillary contraction)

Front 30

dilator pupillae is supplied by (post-/pre-ganglionic) (symp./para-symp.) motor fibers from

Back 30

postganglionic sympathetic motor fibers from carotid plexus

Front 31

the blind spot of the retina occurs where _________ is attached and contains no _______________, but does contain ________________

Back 31

where optic nerve is attached
contains no rods or cones, but includes central artery of retina (only one to eye)

Front 32

changes in blind spot can indicate increase in intracranial pressure because

Back 32

optic n. is surrounded by meninges, which can affect central artery of retina, which is located within the optic n.

Front 33

macula

Back 33

portion of the retina which has the highest concentration of cones (color vision) and the sharpest vision

Front 34

sup. rectus
A/I

Back 34

elevates
supplied by CN III, oculomotor

Front 35

lat. rectus
A/I

Back 35

abducts
supplied by CN VI, abducens

Front 36

med. rectus
A/I

Back 36

adducts
CN III, oculomotor

Front 37

inf. rectus
A/I

Back 37

depresses
CN III, oculomotor

Front 38

sup. oblique
A/I

Back 38

depresses and abducts
CN IV, trochlear

Front 39

inf. oblique
A/I

Back 39

elevates and abducts
CN III, oculomotor

Front 40

Levator palpebrae superioris
AI

Back 40

elevates eyelid
CN III, oculomotor - deep layer (superior tarsal muscle) is supplied by sympathetic fibers

Front 41

Inferior part of levator palpebrae superioris is called

consists of (skeletal/smooth) muscle fibers

insert into

Back 41

superior tarsal muscle

smooth muscle fibers

insert into tarsal plate

Front 42

Involuntary muscle fibers of superior tarsal muscle are innervated by

Back 42

post ganglionic sympathetic fibers, part of carotid plexus

Front 43

ptosis is

ptosis is a sign of

Back 43

drooping of upper eyelid

cervical sympathetic trunk injury (i.e. via lesion of cervical sympathetic chain ganglia

Front 44

ptosis is part of a condition known as

it affects what muscle(s)

Back 44

Horner's syndrome

superior tarsal muscle(s)

Front 45

Contents of orbit receive blood supply from

Back 45

opthalmic a. and its branches

Front 46

Opthalmic artery is a branch of _____________ artery

Back 46

internal carotid a. in cranial cavity

Front 47

Within orbit _________________________, a branch of opthalmic a., enters optic nerve to become sole blood supply of retina

Back 47

central artery of retina

Front 48

contents of orbit are drained by

Back 48

opthalmic vein, including superior opthalmic veins

Front 49

significance of opthalmic v., especially superior opthalmic v.?

Back 49

connection