Week 2 - DRY Flashcards

1
Q

How many permament teeth do adults have?

A

32

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2
Q

How many incisors do adults have?

A

8

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3
Q

How many canines do adults have?

A

4

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4
Q

How many pre molars do adults have?

A

8

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5
Q

How many molars do adults have?

A

12

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6
Q

What is the name of the large fan-shaped muscle on the side of the head?

A

Temporalis

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7
Q

What are the 2 attachments of the temporalis?

A

Temporal fossa

coronoid process of mandible

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8
Q

If the anterior fibres of the temporalis contract - what is its action on the mandible?

A

Elevate mandible

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9
Q

If the posterior fibres of the temporalis contract - what is its action on the mandible?

A

Retract mandible

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10
Q

What type of joint is the tempero-mandibular joint?

A

Synovial hinge

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11
Q

What are the 2 articular processes that form the TMJ joint?

A

Condylar process of mandible

Mandibular fossa of temporal bone

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12
Q

Name 5 movements that occur at the TMJ.

A

Elevation

Depression

Protraction

Retraction

Lateral movements

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13
Q

Name the 4 muscles of mastication

A

Temporalis

Masseter

Lateral pterygoid

Medial pterygoid

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14
Q

Name the 2 attachments of the masseter muscle.

A

Zygomatic arch

Outer surface of ramus of mandible (coronoid process as well)

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15
Q

The lateral pterygoid muscle attaches to what surface of the lateral pterygoid plate?

A

Lateral aspect

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16
Q

The medial pterygoid muscle attaches to what surface of the lateral pterygoid plate?

A

Medial

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17
Q

How does the lateral pterygoid muslce attach to the mandible?

A

Enters into the joint capsule of the TMJ to insert onto neck of mandible

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18
Q

To which part of the mandible does the medial pterygoid attach?

A

Inner surface of ramus

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19
Q

When both lateral pterygoids contract, they cause what movement?

A

Protrusion

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20
Q

When the lateral pterygoid muscle contracts with the medial pterygoid of the same side, what happens?

A

Lateral movement

21
Q

When the two medial pterygoid muscles contract, what is their action?

A

Elevation of mandible (and protrusion)

22
Q

The muscles of mastication produce elevation of the mandible.

What group of muscles produce depression of the mandible?

A

Suprahyoid muscles

23
Q

Name the suprahyoid muscles that cause depression of the mandible (3 out of the 4 muscles do)

A

Geniohyoid

Mylohyoid

Digastric

(Not stylohyoid)

24
Q

What is the innervation of the muscles of mastication?

A

Mandibular branch of Trigeminal nerve

25
Q

The mandibular division of the trigeminal nerve emerges from the cranial cavity through the ……………… foramen

A

Ovale

26
Q

One of its sensory branches, the …………….. ………………. nerve, enters into the mandibular foramen and provides sensory innervation to the mandibular area.

A

Inferior alveolar nerve

27
Q

What is the name of the space between the lips, teeth and cheeks?

A

Oral vestibule

28
Q

What muscle, inervated by the facial nerve, lies in the lateral walls of the oral cavity?

A

Buccinator

29
Q

What muscle of facial expression contracts to cause closing/pursing of the lips?

A

Orbicularis oris

30
Q

The roof of the mouth is made up of what?

A

Hard palate (bony)

Soft palate

31
Q

Which two bones form the hard palate?

A

Maxilla (palatine process)

Palatine bones (horizontal plate)

32
Q

Name the 5 muscles in the soft palate

A

Tensor veli palatini

levator veli palatini

palatoglossus

Palatopharyngeus

Musculis uvulae

33
Q

What is the nerve supply to the muscles in the soft palate?

A

Pharyngeal plexus

(Except tensor veli palatini - Cr. N V3)

34
Q

What is the collective action of the soft palate muscles?

A

Elevate soft palate to contact the posterior wall of pharynx.

Seals off oral passage from nasopharynx e.g. swallowing

35
Q

The tongue is divided into an anterior 2/3 and posterior 1/3rd by a V shaped sulcus called the ………………..

A

Terminal sulcus

36
Q

What is the embryological significance of the foramen caecum?

A

Remnant of thyroglossal duct from which thyroid gland developed.

37
Q

The anterior 2/3rds of the tongue has surface projections of the mucous membrane that make it rough called papillae. Name the 3 types.

A

Fungiform

Filiform

Vallate

38
Q

The dorsal surface of the posterior 1/3rd of the tongue has surface elevations produced by sub-mucosal lymphoid tissue collection. What is this called?

A

Lingual tonsil

39
Q

The inferior surface of the tongue contains a fold in its mucous membrane that fixes it to the floor of the mouth.

What is it called?

A

Lingual frenulum

40
Q

Anterior 2/3rds of tongue - what is the general sensory innervation from?

A

Cr N V 3

41
Q

Anterior 2/3rds of tongue - what is the taste sensation innervation?

A

Facial nerve

42
Q

Posterior 1/3rd of tongue - general sensory innervation?

A

Glossopharyngeal

43
Q

Posterior 1/3rd of tongue - taste sensation innervation?

A

Glossopharyngeal

44
Q

The genioglossus, one of the extrinsic muscles of the tongue, attaches to what ?

A

Genial tubercles on inner surface of mandible close to midline

45
Q

What nerve innervates all the muscles of the tongue, except one?

A

Hypoglossal nerve

46
Q

What nerve innervates the parotid gland?

A

Glossopharyngeal

47
Q

What nerve innervates the sub-mandibular and sub-lingual nerves?

A

Facial nerve

48
Q

what nerve innervates the palatoglossus? (it is the only extrinsic muscle of the tongue not innervated by the hypoglossal nerve)

A

vagus (pharyngeal plexus)

49
Q

What structures lie in between the palatoglossal arch and the palatopharyngeal arches of the soft palate?

A

Palatine tonsils