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Midterm anatomy exci 254 > Lecture 4 - Facial muscles > Flashcards

Lecture 4 - Facial muscles Flashcards

1
Q

Parts of the scalp

A 
Skin
Connective tissue
Aponeurosis
Loose areolar tissue
Pericranium
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2
Q

Skin

A

Sweat and sebaceous gland, abundant arterial supply, good venous and lymphatic drainage

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3
Q

Connective tissue

A

Highly vascularized subcutaneous layer, well supplied with nerves

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4
Q

Aponeurosis

A

Strong tendinous sheet

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5
Q

Loose areolar tissue

A

Sponge-like, allows movement of 1st three layers

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6
Q

Pericranium

A

Forms external periosteum of calvaria

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7
Q

Muscles of facial expression (5)

A
  • Provide us with the ability to express a wide variety of emotions
  • Lie within the layers of superficial fascia
  • Usually originate in fascia or bones of the skull
  • Usually insert into the skin
  • Most important are those surrounding orifices of the head
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8
Q

Glosso

A

Tongue

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9
Q

Labi

A

Lip

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10
Q

Genio

A

Chin

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11
Q

Mylo

A

Mandible

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12
Q

Occuli

A

Eye

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13
Q

Oris

A

Mouth

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14
Q

Sterno

A

Sternum

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15
Q

Stylo

A

Styloid process

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16
Q

Hyo

A

Hyoid bone

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17
Q

Omo

A

Scapula (omoplate)

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18
Q

Frontalis m. action

A

Raises eyebrows

Wrinkles the skin of the forehead horizontally

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19
Q

Occipitalis m. action

A

Draws scalp posterior

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20
Q

Orbicularis oris m. action

A

“kissing muscle”

Closes and protrudes lips

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21
Q

Zygomaticus major m. action

A

Draws angle of mouth superiorly and laterally, as in smiling or laughing
Both raise the angle of the mouth

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22
Q

Zygomaticus minor m. action

A

Elevates upper lip, exposing maxillary teeth

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23
Q

Levator anguli oris m. action

A

Pulls the angle of the mouth upward

24
Q

Levator labii superioris m. action

A

Elevates upper lip

Dilates the nares (nostrils)

25
Q

Depressor labii inferioris m. action

A

Pulls the lower lip downward

26
Q

Depressor anguli oris m. action

A

Pulls the angle of the mouth downward and laterally

27
Q

Buccinator m. action

A

Compresses cheek (whistling, blowing, and sucking)
Pulls corner of mouth laterally
Assists in mastication by keeping food between teeth

28
Q

Mentallis m. action

A

Elevates and protrudes lower lip and wrinkles the skin of the chin up (pouting)

29
Q

Risorius m. action

A

Draws angle of mouth backwards laterally, as in tenseness

30
Q

Platysma m. action

A

Depresses the mandible
Draws the angle of the mouth downward
Wrinkles the skin of the neck

31
Q

Orbicularis oculi m. action

A

Closes the eyelid

Tightens the skin of the forehead

32
Q

Corrugator m. action

A

Draws eyebrows together as in frowning

33
Q

Procerus m. action

A

Wrinkles the skin between the eyebrows

34
Q

2 parts of orbicularis oculi

A

Palpabre and orbitale

35
Q

Muscles that move the mandible

A

Masseter
Temporalis
Medial pterygoid
Lateral pterygoid

36
Q

Masseter m. action

A

Raises the mandible

Closing the jaw

37
Q

Temporalis m. action

A

Elevates and retracts mandible

Closing the jaw

38
Q

Medial pterygoid m. action

A

Elevates and protracts mandible and moves mandible from side to side (grinding)
Closes the jaw

39
Q

Lateral pterygoid m. action

A

Opens and protrudes the mandible from side to side

40
Q

Muscles of the tongue

A

Genioglossus
Styloglossus
Palatoglossus
Hyoglossus

41
Q

Genioglossus m. action

A

Protracts, retracts and depresses the tongue

42
Q

Styloglossus m. action

A

Elevates tongue and draw it posteriorly (retracts)

43
Q

Palatoglossus m. action

A

Elevates posterior portion of tongue and draws soft palate down on tongue

44
Q

Hyoglossus m. action

A

Depresses tongue and draws its side downward

45
Q

Muscles of the floor of the oral cavity

A

Digastric
Stylohyoid
Mylohyoid
Geniohyoid

46
Q

Digastric m. action + innervation

A

CN V, VII

Raises the hyoid bone and assists in opening the jaw (depresses mandible)

47
Q

Stylohyoid m. action + innervation

A

CN VII

Elevates hyoid bone and draws it posteriorly (raises and retracts)

48
Q

Mylohyoid m. action + innervation

A

CN V

Elevates hyoid bone and floor of mouth and depresses mandible

49
Q

Geniohyoid m. action + innervation

A

CN XII

Pulls the hyoid anteriorly and superiorly

50
Q

Sternocleidomastoid (SCM) m. action bilateral

A

Cervical spine flexion, extension of head and elevates sternum during forced inspiration

51
Q

Sternocleidomastoid (SCM) m. action unilateral

A

Laterally flex to same side (side bend) and rotate head to side opposite contracting muscle

52
Q

Extrinsic muscles of larynx (infrahyoid)

A

Omohyoid
Sternohyoid
Sternothyroid
Thyrohyoid

53
Q

Omohyoid m. action + innervation

A

C1-C3

Depresses and retracts hyoid bone

54
Q

Sternohyoid m. action + innervation

A

C1-C3

Depresses larynx and hyoid bone

55
Q

Sternothyroid m. action + innervation

A

C1-C3

Depresses (pulls) thyroid cartilage of larynx

56
Q

Thyrohyoid m. action + innervation

A

CN XII, C1

Elevates thyroid cartilage and depresses hyoid bone

Midterm anatomy exci 254 (8 decks)

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