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ANAT 316 > face and neck muscles > Flashcards

face and neck muscles Flashcards

1
Q

about muscles of facial expression

A
  • superfifcal muscles
  • origins –> facial bones or adjacent muscles
  • insertions–> skin
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2
Q

functions of muscles of facial expression

A
  • sphincters/dilators
  • facial expression alteration
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3
Q

frontalis

A

A: draws scalp back and raises eyebrows
I: CN VII (temporal)

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4
Q

blood supply + venous drainage of frontalis

A

blood supply: internal and external carotid a
venous drainage: ophthalmic v

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5
Q

corrugator supercilii

A

A: draws eyebrows medially/inferiorly
I: CN VII (temporal)

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6
Q

blood supply + venous drainage of corrugator supercilii

A

blood supply: ophthalmic a
venous drainage: superior ophthalmic v

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7
Q

orbicularis oculi

A

3 parts
1. orbital (wink-tightly close eye)
2. palpebral (blink- lossely close eye)
3. lacrimal (compress lacrimal sac)

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8
Q

blood supply + venous drainage of orbicularis oculi

A

innervation: CN VII (temporal and zygomatic)
blood supply: facial a, superficial temporal a. & ophthalmic a.

venous drainage: facial v

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9
Q

orbicularis oris

A

A: purse and protrude lips
I: CN VII (buccal and mandibular)
blood supply: facial a.
venous drainage: facial v

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10
Q

buccinator

A

A: pull cheeks inward
I: CN VII (buccal)

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11
Q

blood supply + venous drainage of buccinator

A

blood supply: buccal and facial a
venous drainage: pterygoid plexus & internal maxillary v

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12
Q

zygomaticus major

A

A: superior/lateral movement of mouth corners
I: CN VII

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13
Q

blood supply + venous drainage zygomaticus major

A

blood supply: facial a
venous drainage: facial v

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14
Q

zygomaticus minor

A

A: superior/lateral movement of mouth corners
I: CN VII (zygomatic & buccal)

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15
Q

blood supply + venous drainage zygomaticus minor

A

blood supply: facial a.
venous drainage: facial v

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16
Q

platysma

A

A: inferior movement of mouth corners
I: CN VII (cervical & mandibular)

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17
Q

blood supply + venous drainage platysma

A

blood supply: facial a
venous drainage: facial v

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18
Q

list all the muscles of facial expression

A
  • frontalis
  • zygomaticus minor
  • zygomaticus major
  • platysma
  • corrguator supercilli
  • orbicularis oculi
  • buccinator
  • orbicularis oris
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19
Q

about muscles of mastication

A

both superficial and deep muscles

functions:
- movement of the mandible

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20
Q

list the muscles of mastication

A
  • temporalis
  • masseter
  • medial pterygoid
  • lateral pterygoid
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21
Q

temporalis

A

O: temporal bone
I: coronoid process of mandible
A: elevate & retract mandible

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22
Q

blood supply + venous drainage of the temporalis

A

I: CN V3
blood supply: maxillary A.
venous drainage: deep temporal v

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23
Q

masseter

A

O: zygomatic arch
I: coronoid process & ramus of manadible
A: elevate mandible & approximate teeth

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24
Q

blood supply + venous drainage of masseter

A

I: CN V3 (masseteric)
blood supply: maxillary a.
venous drainage: masseteric v

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25
Q

medial pterygoid

A

O: maxially tuberosity & lateral pterygoid plate
I: medial ramus & angle of mandible
A: elevation & side-to-side movement of mandible

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26
Q

blood supply & venous drainage of medial ptergygoid

A

I: CN V3 (medial pterygoid)
blood supply: maxillary a
venous drainage: pterygoid plexus

27
Q

what is the pterygoid plexus

A

venous drainage
pterygoid plexus–>maxillary vein –>retromandibular vein–> internal jugular vein

28
Q

lateral pterygoid

A

O: greater wing and lateral pterygoid plate
I: condylar process of mandible
A: protraction and side-to-side movement of mandible

29
Q

blood supply + venous drainage of lateral pterygoid

A

I: CN V3 (lateral pterygoid)
blood supply: maxillary a
venous drainage: pterygoid plexus

30
Q

superficial anterior neck muscles

A
  1. platysma
  2. sternoclediomastoid (SCM)
31
Q

sternocleidomastoid

A

O: manubrium & clavicle
I: mastoid process
A: unilateral –> head rotation & lateral flexion
Bilateral –> flexion

32
Q

blood supply & venous drainage of sternocleidomastoid

A

I: CN XI
blood supply: superior thyroid a
venous drainage: internal jugular v

33
Q

deep anterior neck muscles

A

hyoid muscles
scalene muscles

34
Q

hyoid muscles

A

two groups
suprahyoid (above)
infrahyoid (below)

35
Q

suprahyoid

A
  1. digastric
  2. stylohyoid
  3. mylohyoid
  4. geniohyoid
36
Q

infrahyoid

A
  1. omohyoid
  2. sternhyoid
  3. thyrohyoid
  4. sternothyroid
37
Q

suprahyoid: digastric

A

O: inferior border of mandible
I: temporal bone
A: elevate hyoid & depress mandible

38
Q

blood supply & venous drainage of suprahyoid: digastric

A

innervation: CN V3 (anterior) & CN VII (posterior)

blood supply: facial a. (anterior) & occipital a./posterior auricular a. (posterior)

venous drainage: internal jugular v

39
Q

suprahyoid: stylohyoid

A

O: styloid process
I: hyoid
A: elevate/retract hyoid & elevate tongue

40
Q

blood supply + venous drainage suprahyoid: stylohyoid

A

I: CN VII
blood supply: occipital a
venous drainage: internal jugular v

41
Q

suprahyoid: mylohyoid

A

O: mylohyoid line (body of mandible)
I: other mylohyoid & hyoid
A: elevate hyoid, support tongue, depress mandible

42
Q

blood supply + venous drainage of suprahyoid: mylohyoid

A

I: CN V3 (inferior alveolar)
BS: facial a. & inferior alveolar a.
VD: internal jugular v

43
Q

suprahyoid: geniohyoid

A

O: inferior mental spine (body of mandible)
I: hyoid
A: elevate/protrude hyoid

44
Q

blood supply + venous drainage of suprahyoid geniohyoid

A

I: C1 (sheath of CN XII)
BS: lingual a
VD: internal jugular v

45
Q

infrahyoid: omohyoid

A

O: scapula
I: hyoid
A: depress hyoid

46
Q

blood supply + venous drainge of infrahyoid: omohyoid

A

I: ansa cervicalis (C1-C3)
BS: superior & inferior thyroid a.
VD: superior & inferior thyroid v

47
Q

infrahyoid: sternohyoid

A

O: manubrium (sternum)
I: hyoid
A: depress hyoid

48
Q

blood supply + venous drainage of infrahyoid: sternohyoid

A

I: ansa cervicalis (C1-C3)
BS: superior thyroid a
VD: superior thyroid v

49
Q

infrahyoid: thyrohyoid

A

O: thyroid cartilage
I: hyoid
A: depress hyoid

50
Q

blood supply + venous drainage of infrahyoid: thyrohyoid

A

I: C1(sheath of CN XII)
BS: superior thyroid a.
VD: superior thyroid v

51
Q

infrahyoid: sternothyroid

A

O: manubrium
I: thyroid cartilage
A: depress hyoid & open laryngeal inlet

52
Q

blood supply & venous drainage of infrahyoid : sternothyroid

A

I: ansa cervicalis (C1-C3)
BS: superior thyroid a
VD: superior thyroid v

53
Q

scalene muscles

A

3 muscles
deep neck
O/I: between ribs 1/2 & transverse processes of C1/2 vertebrae

54
Q

functions of scalene muscles

A

neck flexion & rotation

55
Q

blood supply + venous drainage of scalene muscles

A

I: C3-C8
BS: inferior thyroid a
VD: inferior thyroid v

56
Q

list all the hyoid muscles

A
  • mylohyoid
  • geniohyoid
  • thyrohyoid
  • sternohyoid
  • sternothyroid
  • stylohyoid
  • posterior belly of digastric
  • omohyoid
57
Q

list the deep anterior neck muscles

A
  • geniohyoid
  • thyrohyoid
  • sternohyoid
  • sternothyroid
  • middle scalene
  • anterior scalene
  • posterior scalene
  • omohyoid
58
Q

posterior neck

A

superficial to deep dissection- based apprach to reach the suboccipital triangle

59
Q

steps to seeing the suboccipital triangle

A
  1. reflect or remove the trapezius
  2. reflect or remove splenius capitis
  3. reflect levator scapulae
  4. reflect or remove semispinalis capitis
  5. identify the suboccipital triangle
60
Q

suboccipital triangle

A

3 major muscles
1. obliquus capitis superior
2. rectus capitis posterior major
3. obliquus capitis inferior

1 adjacent muscle
4. rectus capitis posterior minor

61
Q

functions of suboccipital triangle

A
  • neck extension & rotation
  • postural support
62
Q

contents of of suboccipital triangle

A
  • vertebral A
  • greater occipital N
63
Q
A

ANAT 316 (17 decks)

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