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Anatomy > Muscles Unit 2 - Large Animal > Flashcards

Muscles Unit 2 - Large Animal Flashcards

0
Q

Cutaneous faciei m.
attachments?
innervation?
action?

A

attachments - laryngeal region TO commissure of mouth

innervation - facial n. (CN VII)

action - facial expression

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1
Q

Muscles of facial expression (14)

innervation?

A 
cutaneous faciei m.
parotidoauricularis m.
orbicularis oculi m.
orbicularis oris m.
zygomaticus m.
levator nasolabialis m.
levator labii superioris m.
dilator nares apicalis m.
caninus m.
depressor labii superioris m.
depressor labii inferioris m.
malaris m.
buccinator m.
frontalis m.

innervation - facial nerve (CN VII)

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2
Q

Parotidoauricularis m.
attachments?
innervation?
action?

A

attachments - fascia on ventral parotid salivary gland TO auricular cartilage

innervation - facial n. (CN VII)

action - draw ear ventrally and caudally (lays back ears)

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3
Q

Orbicularis oculi m.
attachments?
innervation?
action?

A

attachments - medial palpebral lig. TO upper and lower eyelids

innervation - auriculopalpebral n. from facial n. (CN VII)

action - close palpebral fissure

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4
Q

Orbicularis oris m.
attachement?
innervation?
action?

A

attachment - within stroma of lips

innervation - facial n. (CN VII)

action - close lips

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5
Q

Zygomaticus m.
attachements?
innervation?
action?

A

attachments - fascia covering masseter m. and temporal process of zygomatic bn. (RUMINANTS) TO commissure of lips and buccinator m.

innervation - facial n. (CN VII)

action - retract and elevate angle of mouth

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6
Q 
Levator nasolabialis m.
parts?
species differences?
origin/insertion?
innervation?
action?
A 
HORSE
origin - frontal and nasal bones
insertions:
dorsal branch - upper lip and lateral wing of nostril
ventral branch - commissure of lips

RUMINANTS
origin - rostral part of frontal bone and frontalis m.
insertions (only divided into parts in OX):
superficial part - nostril and superior lip
deep part - lateral nasal cartilages, incisive bone, lateral nostril

innervation - facial n. (CN VII)

actions - elevate upper lip and commissure; dilate nostrils

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7
Q 
Levator labii superioris m.
species differences?
origin/insertion?
innervation?
action?
A

HORSE
origin - junction of lacrimal, zygomatic, and maxillary bnn.
insertion - upper lip, single tendon from combined R and L mm.

RUMINANTS
origin - facial tuberosity
insertion - muzzle by way of several tendons
OX - courses between superficial and deep parts of levator nasolabialis m.

innervation - facial n. (CN VII)

action - elevate upper lip

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8
Q 
Dilator nares apicalis m.
species differences?
attachments?
innervation?
action?
A

HORSE only, unpaired m.

attachment - between alar cartilages of nostril

innervation - facial n. (CN VII)

action - dilates nostrils

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9
Q 
Caninus m.
species differences?
origin/insertion?
innervation?
action?
A

HORSE
origin - rostral part of facial crest
insertion - lateral wing of nostril

RUMINANTS
origin - facial tuberosity
insertion - lateral portion of nostril

HORSE, OX - courses between 2 parts of levator nasolabialis m.

innervation - facial n. (CN VII)

action - dilate nostrils

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10
Q 
Depressor labii superioris m.
species differences?
origin/insertion?
innervation?
action?
A

RUMINANTS only

origin - maxilla and facial tuberosity

insertion - upper lip and ventral portion of nostril

innervation - facial n. (CN VII)

action - retract rostral upper lip and ventrolateral nostril

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11
Q

Depressor labii inferioris m.
origin/insertion?
innervation?
action?

A

origin - alveolar border of mandible

insertion - lower lip

innervation - facial n. (CN VII)

action - depress and retract lower lip

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12
Q 
Malaris m.
parts?
species differences?
origin/insertion?
innervation?
action?
A

RUMINANTS only

rostral part
origin - facial part of lacrimal bone
insertion - buccal fascia dorsal to buccinator m.
action - raise caudal cheek

caudal part
origin - masseteric fascia
insertion - lower eyelid
action - depress lower eyelid and widen palpebral fissure

innervation - facial n. (CN VII)

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13
Q 
Buccinator m.
species differences?
origin/insertion?
innervation?
action?
A

main cheek m.

origin - lateral maxilla and alveolar border of mandible

insertion - angle of mouth

innervation - facial n. (CN VII)

action - flatten cheek to press food between teeth, retract angle of mouth

GOAT - thinner

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14
Q 
Frontalis m.
species differences?
origin/insertion?
innervation?
action?
A

RUMINANTS only, best developed in OX

origin - base of horn and intercornual protuberance

insertion - upper eyelid and frontal region

innervation - facial n. (CN VII)

action - elevate superior palpebra and medial angle of eye

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15
Q

Muscles of mastication (4)

innervation?

A

masseter m.
temporalis m.
digastricus m.
pterygoideus mm.

innervation - mandibular n. from trigeminal n. (CN V)

16
Q 
Masseter m.
species differences?
origin/insertion?
innervation?
action?
A

origin - zygomatic arch and facial crest (HORSE) or facial tuberosity (RUMINANTS)

insertion - lateral surface of ramus of mandible

innervation - mandibular n. from trigeminal n. (CN V)

action - close mouth; pull mandible laterally

17
Q

Temporalis m.
origin/insertion?
innervation?
action?

A

origin - temporal fossa and surrounding crests

insertion - coronoid process of mandible

innervation - mandibular n. from trigeminal n. (CN V)

action - close mouth

18
Q 
Digastricus m.
parts?
species differences?
origin/insertion?
innervation?
action?
A

origin - jugular process

insertion - medial surface of ventral border of caudal part of body of mandible
occipitomandibular insertion (HORSE) - caudal border of mandible

innervation
mostly - mandibular n. from trigeminal n. (CN V)
caudal belly - facial n. (CN VII)

action - open mouth

19
Q 
Pterygoideus mm.
species differeneses
origin/insertion?
innervation?
action?
A

Origins - pterygoid process of basisphenoid bn. and…
HORSE - crest formed by pterygoid process and palatine bn.
RUMINANTS - pterygopalatine fossa, lateral surface of palatine bn.

Insertions - medial surface of ramus, condyle of mandible, and…
HORSE - ventral border of mandible
RUMINANTS - neck of mandible

innervation - mandibular n. from trigeminal n. (CN V)

action - close mouth, pull mandible laterally

Anatomy (9 decks)

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