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NE Exam 1 > 4: Muscles Of The Neck > Flashcards

4: Muscles Of The Neck Flashcards

1
Q

Difference between temporal fossa and infratemporal fossa

A

Temporal: superior to zygomatic arch
Infratemporal: inferior to zygomatic arch

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2
Q

Four muscles of mastication

A

Temporalis, masseter, lateral pterygoid, medial pterygoid

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3
Q

general innervation to Muscles of mastication

A

CN V3

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4
Q

General innervation to TMJ

A

CN V3

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5
Q

Temporalis O and I

A

O: temporal fascia and fossa
I: coronoid process of mandible

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6
Q

Temporalis N

A

Deep temporal N

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7
Q

Temporalis A (3 parts)

A

Vertical fibers: elevates mandible
Horizontal fibers: retract mandible
Unilaterally: lateral movement of mandible

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8
Q

Masseter O and I

A

O: zygomatic arch
I: mandibular ramus and angle, deep head also on coronoid process

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9
Q

Masseter N

A

Masseteric N

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10
Q

Masseter A

A

Elevates mandible, protraction, retraction, side-to-side motion

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11
Q

Lateral pterygoid O and I

A

O: greater wing of sphenoid, lateral pterygoid plate
I: neck of mandible, TMJ

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12
Q

Lateral pterygoid N

A

Lateral pterygoid N

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13
Q

lateral pterygoid A: bilaterally and unilateral

A

Bilaterally: protrudes mandible, opens mouth
Unilateral: side-to-side movement

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14
Q

Medial pterygoid N

A

Medial pterygoid N

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15
Q

Medial pterygoid O and I

A

O: maxilla, palatine bone, pterygoid plate, pterygoid fossa
I: pterygoid rugosity, medial mandible

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16
Q

Medial pterygoid A (bilateral and unilaterally)

A

Bilateral: elevates mandible, protrusion
Unilateral: protrusion, medial movement towards opposite side, side-to-side chewing movement

17
Q

Three muscles for mandible elevation

A
  1. Temporalis
  2. Masseter
  3. Medial pterygoids
18
Q

Three muscles for mandible depression

A
  1. Lateral pterygoid
  2. Suprahyoids
  3. Infrahyoids
19
Q

Three muscles for mandible protrusion

A
  1. Lateral pterygoids
  2. Medial pterygoids
  3. Masseter
20
Q

Two muscles for mandible retrusion

A
  1. Temporalis

2. Masseter

21
Q

Three muscles for lateral movement of mandible

A
  1. Ipsilateral temporalis + masseter

2. Contralateral pterygoids

22
Q

Seven prevertebral muscles

A
  1. Posterior scalene
  2. Anterior scalene
  3. Middle scalene
  4. Longus capitis
  5. Longus colliculi
  6. Rectus capitis lateralis
  7. Rectus capitis anterior
23
Q

Where are prevertebral muscles?

A

Posterior to retropharyngeal space

24
Q

Innervation to all prevertebral muscles

A

Cervical and/or brachial plexus

25
Q

Posterior scalene O and I

A

O: posterior tubercles C5-7
I: 2nd rib

26
Q

Action of all three scalene muscles

A

Flexes neck laterally, elevates rib during deep inspiration

27
Q

Middle scalene O and I

A

O: posterior tubercles C2-7
I: superior 1st rib

28
Q

Anterior scalene O and I

A

O: anterior C3-6 TPs
I: 1st rib

29
Q

Where are Longus capitis and coli?

A

Span between vertebral bodies, TPs of cervical vertebrae

30
Q

Where does longus capitis insert?

A

Occipital bone

31
Q

SCM O and I

A

O: manubrium, medial 1/3 of clavicle
I: mastoid process

32
Q

SCM bilateral action

A

Flexes neck

33
Q

SCM action when working with neck extensors

A

Protrudes head

34
Q

SCM unilateral action

A

Laterally flexes head, rotates ear so it approaches shoulder on same side, turns chil to opposite side, tilting head

35
Q

SCM N

A
  1. CN 11

2. C2-4: propriosensory info

36
Q

CN 11 pathway to SCM and trapezius

A

Exits jugular foramen -> posterior to SCM -> emerges about 1/3 down along posterior margin of SCM to cross posterior triangle -> trapezius

37
Q

Torticollis

A

Causes head to turn to side + face turns away from affected side

38
Q

Congenital vs muscular torticollis

A

Congenital: fibrous tumor within SCM in utero
Muscular: SCM injured during difficult birth, tearing fibers -> fibrotic mass that affects CN 11

NE Exam 1 (16 decks)

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