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MSAK 101 > Muscles of the Head and Face > Flashcards

Muscles of the Head and Face Flashcards

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1
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A

occipitofrontalis

Occipito

  • O: lateral 2/3 of superior nuchal line, EOP and mastoid process (temporal bone)
  • I: Galea Aponeurotica
  • A: pulls the back of scalp to raise eyebrows
  • N: Facial nerve (CN VII) posterior auricular branch

Frontalis

  • O: Galea aponeurotica
  • I: skin and fascia above nose and eyes
  • A: pulls scalp posteriorly to raise eyebrows
  • N: facial nerve (CN VII) temporal branch
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2
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temporoparietalis

  • O: temporal fascia superior and anterior to ear
  • I: lateral border of galea aponeurotica
  • A: elevation of ear, stabilizies galea
  • N: facial nerve temporal branch
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3
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Auricularis

  • O: Anterior = galea aponeurotica
    • Supierior = galea aponeurotica
    • postierior = temporal bone
  • I: Anterior = anterior ear
    • Superior = superior ear
    • Posterior = posterior ear
  • A: Anterior = pulls ear anterior (forward)
    • superior = elevates ear
    • posterior = pulls ear posterior (backwards)
  • N: facial nerve
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4
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Orbicularis Oculi

  • O: Orbital portion = maxillary process of frontal bone and frontal process of maxilla
    • palpebral portion = palpebral ligament
    • lacrimal portion = lacrimal crest of the lacrimal bone
  • I: cicumferentially around the orbit meet at the origin
  • A: closes the eye tightly, squinting, depresses upper lid, elevates lower lid
  • N: facial nerve (CN VII) temporal and zygomatic branch
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5
Q
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Corregator supercilii

  • O: frontal bone just above the medial eye - lateral to glabella
  • I: skin of middle portion of eyebrows
  • A: pulls eyebrow downward and medially, with vertical wrinkles in the forehead “thinkers brow”
  • N: facial nerve (CN VII) zygomatic branch
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6
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Procerus

  • O: fascia covering the lower part of the nasal bone and the upper part of the lateral nasal cartilage
  • I: skin and fasica between eyebrows
  • A: pulls inner angle of the eyebrows downward and produces transverse wrinkles over the bridge of the nose. “the look of disgust”
  • N: facial nerve (CN VII) superior bruccal branches
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7
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A

Levator Palpebrae Superioris

  • O: inner surface of the lesser wing of the sphenoid
  • I: upper eyelid (faschia and skin)
  • A: raises upper eyelids
  • N: oculomotor nerve (CN III)
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8
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Nasalis

  • O: transverse part (superior) = maxilla, lateral to nose
    • Alar part (inferior) = maxilla, superior to the canine aleolar process
  • I: transverse part = opposite side nasalis over the upper cartilage of nose
    • alar part = alar cartilage of nose (nasal wing)
  • A: flares nostrils
  • N: facial nerve (CN VII)
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9
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A

depressor septinasi

  • O: incisive fossa of maxilla
  • I: septum and alar cartilage of the nose
  • A: constricts nostrils
  • N: facial nerve (CN VII)
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10
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A

Levator labii superoiris alaeque nasi

  • O: frontal process of the maxilla
  • I: lateral slip - upper lip muscles. medial slip - alar cartilage of the nose
  • A: raises & protrudes the upper lip, flares nostrils
  • N: facial nerve (CN VII)
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11
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Levator Labii superioris

  • O: medial inferior orbital margin of maxilla
  • I: upper lip muscles
  • A: elevation and eversion for the upper lip
  • N: facial nerve (CN VII)
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12
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zygomaticus minor

  • O: zygomatic bone (maxillary process)
  • I: skin, muscles and fascia of upper lip (orbicularis oris)
  • A: elevation & eversion of the upper lip
  • N: facial nerve (CN VII)
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13
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Zygomaticus Major

  • O: zygomatic bone (temporal process of the zygomatic bone)
  • I: angles of mouth (modiolus)
  • A: elevation of the angle of the mouth (smiling) pulls angle of the mouth laterally
  • N: facial nerve (CN VII)
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14
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A

Levator Anguli Oris

  • O: below infraorbital foramen of the maxilla
  • I: modiolus (near angle of the mouth)
  • A: elevates the angle of the mouth
  • :N facial nerve (CN VII)
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15
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A

Risorius

  • O: parotid fascia [(salivary glands) over the masseter]
  • I: modiolus
  • A: pulls the angle of the mouth lateraly
  • N: facial Nerve (CN VII)
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16
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A

Buccinator

  • O: maxilla and mandible ( posterior alveolar processes) and pterygomandibular raphe/ ligament
  • I: lateral angle of the mouth (modiolus)
  • A: compression of cheek against teeth
  • N: facial nerve (CN VII)
17
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A

Orbicularis Oris

  • O: modiolus
  • I: circumferentially around the mouth blending with other muscles
  • A: closes lips & protrudes them forward
  • N: facial nerve: (CN VII)
18
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A

Depressor Labii Inferioris

  • O: madible (between symphysis & mental foramen)
  • I: skin & fascia of lower lip
  • A: draws the lower lip downward & laterally, eversion of the lower lip
  • N: facial nerve (CN VII)
19
Q
A

Depressor Anguli Oris

  • O: oblique line of the mandible (lateral aspect of mental tubercle of mandible)
  • I: modiolus ( near the angle of the mouth)
  • A: depresses the angle of the mouth
  • N: facial nerve (CN VII)
20
Q
A

Mentalis

  • O: incisive fossa of the mandible
  • I: skin & fascia of the chin
  • A: elevation & eversion of the lower lip & wrinkles skin of chin, as in pouting
  • N: facial nerve (CN VII)
21
Q
A

Platysma

  • O: subcutaneous fascia (deltopectoral region below clavicle)
  • I: mandible & subcutaneous fascia of lower face
  • A: tenses the skin over the lower neck (creates ridge in skin depresses mandible and lower lip
  • N: facial nerve (CN VII)
22
Q
A

Temporalis

  • O: temporal fossa (temporal, shenoid & frontal bone lateral aspects)
  • I: coronoid process & ramus of the mandible (open the jaw to palpate)
  • A: closes the jaw (elevation & retraction of the mandible) posterior fibers
  • N: Trigeminal nerve (CN V)
23
Q
A

Masseter

  • O: Superficial part = zygomatic process (maxilla) & inferior border of the zygomatic arch;
    • profundus (deep) part = posterior 1/3 of inferior border & medial surface of the zygomatic arch
  • I: Superficial part = angle & ramus of the mandible;
    • Deep part = superior 1/2 of ramus & coronoid process of the mandible
  • A: elevation of the mandibe (clench teeth)
    • protraction of mandible (anterior fibres)
    • retraction of mandible (posterior fibres)
  • N: Trigeminal nerve ( CN V)
24
Q
A

Lateral pterygoid

  • O: Superior head = greater wing of the sphenoid
    • Inferior head = lateral surface of the lateral pterygoid plate (sphenoid bone)
  • I: Superior Head = capsule/ articular disc of TMJ
    • Inferior head = neck of mandibular condyle
  • A: opens the jaw (protraction and depression of the mandible) & lateral deviation of mandible to side opposite of contraction (during chewing)
  • N: Trigeminal nerve (CN V)
25
Q
A

Medial Pterygoid

  • O: medial surface of the lateral pterygoid plate (sphenoid bone), palatine bone & pterygoid fossa
  • I: inner surface of the mandibluar ramus and angle of the mandible
  • A: closes the jaw (elevation); ipsilateral deviation (ie deviates to the side of the contraction), protractin
  • N: Trigeminal nerve (CN V)
26
Q
A

Mylohyoid

  • O: inner surface of manbidle (mylohyoid line)
  • I: body of hyoid (anterior surface) along midline at mylohyoid raphe
  • A:elevation of hyoid bone (raises floor of mouth for swallong) depression of mandible when hyoid if fixed
  • N: trigeminal nerve ( CN V - mandibular division, V3)

No muscle test

27
Q
A

Digastric

  • O: Posterior Belly: mastoid notch of temporal bone
    • Anterior belly: digastric fossa of internal mandible
  • I: body og hyoid (both bellies attach by a pulley tendon)
  • A: elevation of the hyoid bone; depression of mandible (open mouth); stabilize hyoid bone for infrahyoid action
  • N: Posterior Belly: facial nerve (CN VIII)
    • Anterior Belly: trigeminal nerve (CN V)

No muscle test

28
Q
A

Geniohyoid

  • O: inner surface of mandible (mental spines)
  • I: body of hyoid (paired muscles separated by septum)
  • A: elevation of hyoid bone; depression of mandible (works with mylohyoid)
  • N: hypoglossal nerve (CN XII)

No muscle test

29
Q
A

Stylohiod

  • O: styloid process of temporal bone
  • I: lateral margin of hyoid body (base of greater horn)
  • A: elevation of hyoid (during swallowing) stabilizes hyoid bone for infrahyoid action
  • N: Facial Nerve (CN VII)

No muscle test

30
Q
A

Thyrohyoid

  • O: thyroid cartilage (oblique line)
  • I: body of hyoid bone
  • A: depression of hyoid bone; elevation of thyroid cartilage (Larynx)
  • N: C1 spinal nerve (via CN XII)

No muscle test

31
Q
A

Omohyoid

  • O: Superior Belly: hyoid bone (lateral to sternohyoid)
    • Inferior Belly: superior scapular border (medial to suprascapular notch)
  • I: clavical (both bellies meet & are held loosely to the clavical by a pulley tendon
  • A: depression of hyoid bone and larynx (acts eccentrically with suprahyoid muscles to provide them a stable base)
  • N: Ansa Cervicalis (C1, C2, C3)

No Muscle test

32
Q
A

Sternohyoid

  • O: Manubrium & sternoclavicular joint (posterior aspect of both)
  • I: body of hyoid bone
  • A: depression of hyoid & larynx; acts eccentrically with suprahyoid muscles to provide them a stable base
  • N: Ansa cervicalis (C1, C2, C3)

No Muscle test

33
Q
A

Sternothyroid

  • O: manubrium of sternum (posterior aspect)
  • I: thyroid cartilage (oblique line)
  • A: depression of thyroid cartilage; acts eccentrically with the suprahyoid muscles to provide them a stable base
  • N: Ansa cervicalis (C1, C2, C3)

No muscle test

MSAK 101 (32 decks)

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