Gross Anat Lecture 2 Facial Muscles, Eyelid And Ear

Front 1

How are facial muscles different from muscles of mastication

Back 1

facial: involved with facial
expression
mastication: involved in raising
and lowering the jaw

Front 2

What innervates facial muscles

Back 2

facial nerve (cranial nerve VII)

Front 3

What are circumoral glands in the cat, where are they more numerous, and what are their secretions used for

Back 3

large sebaceous glands
more numerous on the lower lip
used for scent marking

Front 4

Platysma m.
innervation and action

Back 4

I: dorsal and ventral buccal
brs. and caudal auricular
br. of CN
VII
A: draw the commissure of
the lips caudally

Front 5

Orbicularis oris m.
innervation and action

Back 5

I: dorsal and ventral buccal
brs. of CN VII
A: close mouth, pull nose
downward during sniffing,
increase diameter of nostril

Front 6

Buccinator m.
innervation and action

Back 6

I: dorsal and ventral buccal
brs. of CN VII
A: move food from the
vestibule to the masticatory
surface of the teeth

Front 7

Levator nasolabialis m.
innervation and action

Back 7

I: auriculopalpebral br. of CN VII
A: dilate nostril and raise upper
lip

Front 8

Zygomaticus m.
innervation and action

Back 8

I: auriculopalpebral br. of CN
VII
A: draw commissure of the
mouth dorsocaudally; draw
the scutiform cartilage (and
ear) rostrally

Front 9

Parotidoauricularis m.
innervation and action

Back 9

I: CN VII
A: depress the ear

Front 10

What are the two palpebral ligaments and what do they attach

Back 10

medial: attaches the medial
palpebral commissure to the
frontal bone
Lateral: attaches the lateral
palpebral commissure to the
zygomatic bone

Front 11

What do the palpebral conjunctiva and bulbar conjunctiva cover

Back 11

PC: inner surface of the eyelid
BC: rostral part of the sclera
(continuous with outer layer of
cornea)

Front 12

what is the junction of the palpebral and bulbar conjunctiva

Back 12

conjunctival fornix

Front 13

what is the space between the eyeball and the palpebrae

Back 13

conjunctival sac

Front 14

What are the tarsal glands, where do their ducts open, what is their secretion part of, where are they better developed

Back 14

modified sebaceous glands
ducts open at the eyelid margin
secretion is part of the tear film
better dev in the upper eyelid

Front 15

where are tears produced

Back 15

lacrimal and superficial glands of the third eyelid

Front 16

what is the name of the slit in the upper lip

Back 16

philtrum

Front 17

Orbicularis oculi m
innervation and action

Back 17

I: palpebral brs. of
auriculopalpebral br. of CN VII
A: Closes palpebral fissure

Front 18

Retractor anguli oculi lateralis m.
innervation and action

Back 18

I: palpebral brs. of
auriculopalpebral br. of CN
VII
A: retracts the lateral angle of
the eye caudally

Front 19

Levator anguli oculi medialis m.
innervation and action

Back 19

I: palpebral brs. of
auriculopalpebral br. of CN VII
A: raises the eyelid

Front 20

What are the 3 mm. of the eyelid

Back 20

orbicularis oculi
retractor anguli oculi lateralis
levator anguli oculi medialis

Front 21

what are the 3 cartilages of the ear

Back 21

auricular cartilage
annular cartilage
scutiform cartilage

Front 22

What is the helix of the right K9 ear

Back 22

curved margins of the auricular cartilage

Front 23

what is the anthelix of the right K9 ear

Back 23

transverse ridge on the inner aspect of the auricle

Front 24

what is the marginal cutaneous sac of the right K9 ear

Back 24

skin pouch

Front 25

what is the tragus of the right K9 ear

Back 25

thick part of the auricular cartilage located laterally

Front 26

what is the antitragus of the right K9 ear

Back 26

ridge of cartilage located caudal to the tragus

Front 27

what is the intertragic incisure of the right K9 ear

Back 27

groove between the tragus and antitragus

Front 28

what is the pretragic incisure of the right K9 ear

Back 28

groove located rostral to the tragus

Front 29

what separates the external and middle ear

Back 29

the tympanic membrane

Front 30

what are the auditory ossicles and where are they located

Back 30

malleus, incus, stapes

in the tympanic cavity

Front 31

what 2 mm. are located in the tympanic cavity

Back 31

tensor tympani and stapedius

Front 32

what connects the tympanic cavity with the nasopharynx

Back 32

internal auditory (eustachian) tube

Front 33

what portion of the inner ear is involved with the vestibular system

Back 33

semicircular canals and vestibule cavities in the petrous temporal bone containing membranous semicircular canals, utricle and saccule

Front 34

what portion of the inner ear is involved with hearing

Back 34

cochlea cavity in the petrous temporal bone containing the membranous cochlear duct

Front 35

what kind of fluid does the inner ear contain

Back 35

perilymph and endolymph