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Yr2 Head & Neck - Anatomy > Week 2 - Wet Room > Flashcards

Week 2 - Wet Room Flashcards

1
Q

Sections of the mandible

A
  • Symphisis anteriorly
  • Mental spines (post surface of the symphisis)
  • Mental Foramen at the front
  • Mylohyoid line along internal surface
  • Angle Where it bends upwards
  • Ramus, the section between the angle and the processes superiorly
  • Mandibular Foramen on internal surface of ramus
  • Coronoid process (ant process)
  • Neck between ramus and condyle
  • Mandibular condyle (the posterior process)
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2
Q

How many teeth do we have? (Primary and permanent)

A

Primary:

  • Incisor - 8
  • Canines = 4
  • Molars = 8

Permanent:

  • Incisor = 8
  • Canines = 4
  • Premolars = 8
  • Molars = 12
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3
Q

What type of joint is the Temporomandibular joint

A

Synovial Hinge & Sliding

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4
Q

What articular processes form the TM joint?

A

The mandibular condyle

The mandibular fossa of the temporal bone

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5
Q

What movements occur at the TM joint?

A
  • Depression
  • Elevation
  • Protrusion
  • Retraction
  • Side to side
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6
Q

What are the muscles of mastication?

A
  • Temporalis
  • Masseter
  • Lateral Pterygoid
  • Medial Pterygoid
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7
Q

Where does the temporalis attach

A

Coronoid process of mandible

Parietal Bone

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8
Q

What action does the temporalis have?

A

Note its fan shaped so its ant fibres are verticle and post are horizontal

Ant fibres = Elevation
Post Fibres = Retraction

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9
Q

What are the attachments of the masseter?

A
  • Maxillary process of zygomatic and zygomatic arch

- Outer Surface of ramus and coronoid process

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10
Q

Action of the masseter?

A

Elevation

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11
Q

Where do the pterygoid muslces attach?

A

To the lateral and medial surface of the lateral pterygoid plate respectively.

Lateral -> Neck of mandible & TMJ

Medial -> Medial side of the mandibular angle

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12
Q

Action of the pterygoids?

A

Lateral - Protraction
Medial - Elevation
Contralateral medial/lateral -> Side to side

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13
Q

Summarise the movements produced by the different muscles of mastication?

A

Ant fibres of Temporalis - Elevation
Post Fibres of Temporalis - Retraction

Masseter - Elevation

Lateral Pterygoids - Protraction
Medial Pterygoids - Elevation
Medial + opposite lateral pterygoid - Side to side movements

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14
Q

What muscles produce depression of the mandible?

A

Suprahyoids except Stylohyoid

So geniohyoid, digastric and mylohoid

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15
Q

Which branch of the Trigeminal nerve contains motor fibres?

A

MAndibular (V3)

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16
Q

Where does V3 emerge from the skull?

A

Oval Foramen

17
Q

Where does the mandibular division of Cr N V supply the muscles of mastication?

A

In the infratemporal fossa

18
Q

What branch of the V3 provides sensory innervation to the mandible?

A

The inferior Alveolar Nerve, It passes through the mandibular foramen

19
Q

Function of the Nose?

A
  • Traps Dirt/immune function
  • Warms/moistens air
  • Smell
  • Vocal Resonance
  • Drains paranasal sinuses
20
Q

What bones from the lateral wall of the nose?

A
  • Frontal
  • Nasal
  • Ethmoid
  • Sphenoid
  • Maxilla
  • Inf Turbinate
  • Palatine
21
Q

What bone forms the roof ot the nasal cavity?

A

Mostly the cribriform plate of the ethmoid

22
Q

What bones from the hard palate?

A

Palatine process of maxilla

Palatine bone

23
Q

What forms the nasal septum?

A
  • Nasal Cartilage at the front
  • Perpendicular plate of ethmoid superiorly
  • Vomer & palatine bones below the ethmoid
24
Q

What is the Cristal Galli?

A

A projection of the ethmoid into the cranial cavity

The Falx Cerebri fold of dura mater attaches to it

25
Q

What kind of epithelium lines the nasal cavity?

A

Respiratory Epithelium

I.e. Ciliated Pseudostratified columnar Epithelium

26
Q

What mucosa lines the roof of the nasal cavity?

A

The Olfactory Mucosa, containing fibres of the 1st cranial nerve

27
Q

What arteries supply the nasal cavity?

A 
Posterior = Sphenopalantine
Superior = Post/Ant Ethmoidal
Anteriorly = Branches of facial artery
28
Q

Function of the paranasal sinuses?

A
  • Buffer Trauma
  • Decrease Skull Weight
  • Vocal Resonance
29
Q

What drains out each nasal meatus?

A

Inf - Nasolacrimal Duct

Middle

  • Maxillary Sinus
  • Front Sinus
  • Ant & Middle Ethmoidal Air cells

Sup - Post Ethmoidal Air Cells

Sphenoethmoid Recess - Spehnoid Sinus

30
Q

What nerves innervate the nasal sinuses?

A

Frontal, ethmoidal and sphenoid are innervated by VI

Sphenoid and maxillary are innervated by V2

Yr2 Head & Neck - Anatomy (9 decks)

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