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ODS > Muscles Of Facial Expression > Flashcards

Muscles Of Facial Expression Flashcards

1
Q

5 branches of facial nerves

A

Temporal
Zygomatic
Buccal
Mandibular
Cervical

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2
Q

Functions of facial expression muscles

A

Show emotions and expressions
Speech
Mastication

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3
Q

Where do the muscles of facial expressions lie?

A

Subcutaneous fascia (superficial layer)

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4
Q

Orbicularis oris
(Origin, insertion, action, innervation and blood supply)

A

Origin - anterior nasal spine and midline above lips.

Insertion - fibres interlace with muscles around lips.

Action - closes and opens mouth, compresses and protrusion of lips.

Nerve supply - facial nerve; buccal branch

Blood supply - facial artery, maxillary and superficial temporal arteries.

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5
Q

Levator Labii Superioris

(Origin, insertion, action, innervation and blood supply)

A

Origin - lower rim of orbit

Insertion - fibres of orbicularis oris at upper lip

Action - elevate upper lip

Innervation - facial nerve; zygomatic and buccal branches

Blood supply - facial and maxillary arteries

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6
Q

Depressor Labii Inferioris
(Origin, insertion, action, innervation and blood supply)

A

Origin - beneath lowest part of oblique line of mandible

Insertion - orbicularis oris in lower lip

Action - depresses lower lip

Nerve supply - facial nerve, mandibular branch

Blood supply - facial and maxillary arteries

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7
Q

Zygomaticus minor
(Origin, insertion, action, innervation and blood supply)

A

Origin - zygomatic arch

Insertion - orbicularis oris

Actions - elevate upper lip

Intervention - facial nerve; buccal and zygomatic branches

Blood supply - facial artery

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8
Q

Zygomaticus major
(Origin, insertion, action, innervation and blood supply)

A

Origin - zygomatic arch

Insertion - travels downwards and medically to insert into orbicularis oris at angle of mouth

Action - elevated corners of mouth

Innervation - facial nerve; buccal and zygomatic branches

Blood supply - facial artery

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9
Q

Levator anguli oris
(Origin, insertion, action, innervation and blood supply)

A

Origin - canine fossa of maxilla, below infraorbital foramen

Insertion - orbicularis oris at corner of mouth

Action - elevates corner of mouth

Nerve supply - facial nerve; buccal and zygomatic branches

Bloody supply - facial and maxillary arteries

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10
Q

Depressor anguli oris
(Origin, insertion, action, innervation and blood supply)

A

Origin - beneath angle of mandible

Insertion - converges into angles of mouth and blends with orbicularis oris

Action - depresses coroner of mouth

Nerve supply - facial nerve; buccal and mandibular nerves

Blood supply - facial and maxillary arteries.

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11
Q

Mentalis
(Origin, insertion, action, innervation and blood supply)

A

Origin - anterior surface of mandible (incisive fossa)

Insertion - skin covering skin

Action - pulls skin of skin up, helps clear food from labial surface

Innervation - facial nerve; mandibular branch

Blood supply - facial and maxillary arteries.

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12
Q

Buccinator
(Origin, insertion, action, innervation and blood supply)

A

Origin - pterygomandibular raphae and buccal alveolar bone (maxillary and mandibular molar region)

Insertion - blend with orbicularis oris at corner of mouth

Action - pulls corner of mouth back and compress cheek again buccal surface of molars.

Nerve supply - facial nerve; buccal branch

Blood supply - facial and maxillary arteries.

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13
Q

How does the buccinator aid in mastication

A

Works in opposition with tongue to direct food to occlusal surfaces of teeth

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14
Q

Risorius
(Origin, insertion, action, innervation and blood supply)

A

Origin - angle of mandible

Insertion - corner of mouth

Action - retracts angle of mouth (assist in smiling)

Innervation - facial nerve; buccal branch

Blood supply - facial artery

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15
Q

Muscles that lie in the subcutaneous fascia can be divided into which groups

A

Mouth
Scalp
Neck
Eyes
Nose
Ears

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16
Q

3 parts of occipitofrontalis and the part associated with facial expressions

A

Frontalis - associated with facial expressions
Occipitalis
Galea aponeurotica

17
Q

Frontalis
(Origin, insertion, action, innervation and blood supply)

A

Origin - connective tissue of scalp

Insertion - skin of frontal regions of eyebrows

Action - pulls scalp up and back; elevates eyebrows and wrinkles scalp

Innervation - facial nerve; temporal branch

Blood supply - superficial temporal and opthalmic arteries

18
Q

How many facial expression muscles are associated with the mouth

A

10

19
Q

How many facial expression muscles are associated with the scalp

A

1
Frontalis

20
Q

How many facial expression muscles are associated with neck

A

1
Platysma

21
Q

Platysma
(Origin, insertion, action, innervation and blood supply)

A

Origin - clavicle and shoulder

Insertion - lower border of mandible, skin and muscle of lower face and mouth

Actions - pulls down corners of mouth and wrinkles skin of chin and neck

Innervation - facial nerve; cervical branch

Blood supply - facial artery; thyrocervical trunk

22
Q

How many facial expression muscles are associated with the eyes

A

3
Orbicularis oculi
Corrugator
Procerus

23
Q

Orbicularis oculi 2 parts
(Origin and action)

A

Orbital - circles eye, originates from bone of upper medial orbital margin, closes eyes forcefully.

Palpebrae - arches laterally within eyelid, originates from medial palpebral ligament, closes eyes gently (blinking)

24
Q

Orbicularis oculi innovation and blood supply

A

Nerve - facial nerve; zygomatic and temporal branches

Blood supply - superficial temporal, facial and maxillary arteries

25
Q

Corrugator
(Origin, insertion, action, innervation and blood supply)

A

Origin - bridge of nose

Insertion - skin of lateral part of eyebrow

Action - pulls eyebrows medially (frown)

Nerve supply - facial nerve; temporal branch

Blood supply - superficial temporal artery

26
Q

Procerus
(Origin, insertion, action, innervation and blood supply)

A

Origin - bridge of nose

Insertion - medial end of eyebrows

Action - pulls eyebrows down and wrinkling of nose

Nerve supply - facial nerve; zygomatic branch

Blood supply - facial artery

27
Q

Muscle of facial expression associated with the nose

A

Nasalis
2 parts - dilator naris and compressor naris

28
Q

Nerve and blood supply of nasalis

A

Facial nerve; buccal branches
Facial artery

29
Q

Dilator naris
(Origin, insertion and action)

A

Origin - nasal margin of maxilla

Insertion - skin of nostril

Actions - flares the nostril

30
Q

Compressor naris
(Origin, insertion and action)

A

Origin - top of maxillary canine ridge

Insertion - midline over nasal cartilage

Action - closes nostrils

31
Q

What facial muscles act on external ear

A

Anterior auricular
Superior auricular
Posterior auricular

32
Q

Anterior auricular
(Origin, insertion, action, innervation and blood supply)

A

Origin - scalp and temporal fascia

Insertion - anterior medial aspect of helix of ear

Action - pulls ear forward slightly

Innervation - facial nerve; temporal branch

Blood supply - posterior auricular artery

33
Q

Superior auricular
(Origin, insertion, action, innervation and blood supply)

A

Origin - scalp and temporal fascia

Insertion - superior medial aspect of ear

Action - raises the ease

Nerve supply - facial nerve; temporal branch

Blood supply - posterior auricular artery

34
Q

Posterior auricular
(Origin, insertion, action, innervation and blood supply)

A

Origin - superior lateral aspect of mastoid process

Inversion - inferior medial aspect of auricle in ear

Action - pulls ear back

Innervation - facial nerve; temporal branch

Blood supply - posterior auricular artery

35
Q

Conditions that may affect functionality of facial muscles and how can they impact the patient and clinician

A

Bell’s Palsy
Stroke
Surgery
- difficulties swallowing, talking, smiling.
- communication, injections may be more difficult.

ODS (24 decks)

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