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SPTH1103 > Muscles of the head and neck > Flashcards

Muscles of the head and neck Flashcards

1
Q

Muscles derived from pharyngeal arch 1 (Mandibular)

A

Muscles of mastification, (Masseter, Temporalis, Lateral pterygoid, medial pterygoid). Mylohyoid & ant. belly of digastic
Tensor Tympani
Tensor Veli Palantini

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2
Q

Muscles Derived from Pharyngeal arch 2 (Hyoid)

A

Muscles of facial expression
Stapedius
Stylohyoid
post. belly of digastric

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3
Q

Muscles derived from Pharyngeal arch 3

A

Stylopharyngeus

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4
Q

Muscles derived from Pharyngeal arch 4-6

A

Cricothyroid
Levator Veli Palatine
Constrictors of Pharynx
Intrinsic muscles of larynx

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5
Q

Where does the Cranial nerve VII emerge through

A

Emerges through stylomastoid foramen, divides inside parotid gland

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6
Q

What muscle raises the eyebrows

A

occipitofrontalis

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7
Q

Function of levator labii superioris

A

Lifting the top lip

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8
Q

Function of the corrugator supercilii

A

Draws the eyebrow downward and medially vertical wrinkes of the forehead, “frowning” muscles

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9
Q

Functions of the orbicularis Oculi

A

Closes the eye,

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10
Q

What does the palpebral portion of the orbicularis oculi do

A

Involuntarily closes the eye

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11
Q

What does the orbital portion of the orbicularis oculi do

A

Conscious control

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12
Q

What does the medial ligament do

A

Lacrimal function (tears), attaches to the lacrimal duct

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13
Q

What are the three muscles in the nose

A

Nasalis, depressor, septi nasi, procerus

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14
Q

What is the muscle in the chin

A

Mentalis

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15
Q

What is the muscle in the neck (facial expression)

A

Platysma

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16
Q

Function of orbicularis oris

A

Closes the mouth and puckers the lips when it contracts

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17
Q

Function of buccinator

A

Pushes cheek against teeth and aids in chewing

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18
Q

Function of risorius

A

Grinning

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19
Q

Zygomaticus Major, Minor Function, Levator labii superioris, levator anglui oris

A

Pulling the corners of the lips superiorly and laterally (Smiling)

20
Q

Function of the mentalis

A

Elevate and protrude the lip

21
Q

What is mastication

A

Chewing

22
Q

What is cranial nerve 5

A

Trigeminal (sensory + motor-)

23
Q

What are the three branches of cranial nerve 5

A

Mandibular nerve V3, Maxillary Nerve (V2), Ophthalmic nerve V1

24
Q

Function of mandibular nerve

A

Movement of mandible during mastication

25
Q

Insertion of the temporalis

A

Mandible

26
Q

Buccinator muscle function

A

Closes the mouth and puckers the lips when it contracts

27
Q

What occurs during a bilateral contraction of the lateral pterygoid

A

Protrudes mandible

28
Q

What occurs during a unilateral contraction of the lateral pterygoid

A

Lateral motion towards opposite side for grinding

29
Q

The function of two digastric bellies

A

Stablises mandible, aids in elevating hyoid bone for swallow
- opens jaw if hyoid fixed

30
Q

The function of mylohyoid

A

Elevates floor of the mouth and hyoid bone, contributes to opening if hyoid bone fixed

31
Q

Function of masseter

A

Elevates the mandible

32
Q

Function of temporalis

A

Elevates mandible and may contribute to the lateral movement

33
Q

Function of medial pterygoid

A

Elevates and protrudes mandible,
- unilateral contraction, moves the jaw laterally

34
Q

Which cranial nerve innervates the muscles of mastication

A

Trigeminal nerve

35
Q

embryological origin of the muscles of facial expression

A

Pharyngeal arch II

36
Q

Embryological origin of the muscles of mastication

A

Pharyngeal Arch I

37
Q

Which cranial nerve innervates the muscles of facial expression?

A

Facial Nerve

38
Q

Muscle that elevates eyebrows and forehead; wrinkles forehead.

A

Frontalis

39
Q

Muscle that elevates eyebrows and forehead; wrinkles forehead

A

Orbicular Oris

40
Q

The muscle that Draws ala of the nose towards septum to compress the opening

A

Nasalis

41
Q

Muscle that depresses mandible and tenses skin of neck and lower face

A

Platysma

42
Q

Muscle that Closes eyelids

A

Obicularis Oculi

43
Q

Muscle that Elevates and protrudes lower lip and wrinkles chin

A

Mentalis

44
Q

The muscle that Presses cheek against molar teeth, aiding chewing

A

Buccinator

45
Q

Elevates lip, dilates nostril, raises angle of the mouth

A

Levator labii superioris

46
Q

The lateral and medial pterygoid muscles arise from the lateral pterygoid plate. Which unpaired skull bone are these plates part of?

A

Sphenoid

47
Q

The lateral and medial pterygoid muscles arise from the lateral pterygoid plate. Which unpaired skull bone are these plates part of?

A

Digastric

SPTH1103 (9 decks)

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