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BDS2 BAMS Oral Biology > 7. Oral Functions 1 (Muscles) > Flashcards

7. Oral Functions 1 (Muscles) Flashcards

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1
Q

Muscles of mastication (4)

A

Masseter
Temporalis
Medial pterygoid
Lateral pterygoid

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2
Q

Origin of masseter

A

Zygomatic arch

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3
Q

Insertion of masseter

A

Lateral surface and angle of the mandible

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4
Q

Function of masseter

A

Elevation of mandible

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5
Q

Examination of masseter

A

One finger intra-oral, two on cheek (post. to wisdom tooth)/feel checks and clench

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6
Q

Origin of temporalis

A

Floor of temporal fossa

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7
Q

Insertion of temporals (2)

A

Coronoid process

Anterior border of the ramus

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8
Q

Function of temporalis

A

Elevation and retraction of mandible

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9
Q

Examination of temporalis

A

Palpate origin by clenching

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10
Q

Origin of lateral pterygoid

A

Lateral surface of lateral pterygoid plate

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11
Q

Insertion of lateral pterygoid (2)

A

Anterior border of condyle

Intra-articular disc

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12
Q

Function of lateral pterygoid (2)

A

Protrudes and laterally deviates mandible

Inferior head functions with mandibular depressors during opening

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13
Q

Attachment/insertion of inferior belly of lateral pterygoid

A

Head of condyle

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14
Q

Attachment/insertion of superior belly of lateral pterygoid

A

Intra-articular disc

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15
Q

Examination of lateral pterygoid

A

Inaccessible to manual palpation (move mouth side to side with resistance)

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16
Q

Origin of deep head of medial pterygoid

A

Medial surface of lateral pterygoid

17
Q

Origin of superficial head of medial pterygoid

A

Tuberosity of the maxilla

18
Q

Insertion of medial pterygoid

A

Medial surface of angle of mandible

19
Q

Function of medial pterygoid

A

Elevation and protrusion of mandible

20
Q

Examination of medial pterygoid

A

Inaccessible to manual palpation

No reliable way to examine

21
Q

Types of TMJ movement (2)

A

Rotation (initial opening)

Translation (wider opening)

22
Q

TMJ movement during mandibular protrusion (2)

A

Both condyles leave their fossae

Move along the articular eminences

23
Q

TMJ movement during mandibular retrusion (2)

A

Both condyles leave the eminences

Move back into their fossae

24
Q

Factors affecting max bite forces

A

Muscle mass

25
Q

Max bite force between molars

A

200-700N

26
Q

Suprahyoid muscles (4)

A

Digastric
Mylohyoid
Geniohyoid
Stylohyoid

27
Q

Infrahyoid (strap) muscles

A

Sternohyoid
Omohyoid
Thyrohyoid
Sternothyroid

28
Q

Which muscles act as depressors when the hyoid bone is fixed by contraction of the infrahyoids (3)

A

Digastric
Mylohyoid
Geniohyoid

29
Q

Types of tongue muscles (2)

A

Intrinsic

Extrinsic

30
Q

Intrinsic tongue muscles (3)

A

Longitudinal
Vertical
Transverse

31
Q

Extrinsic tongue muscles (4)

A

Genioglossus
Hypoglossus
Palatoglossus
Styloglossus

32
Q

Function of facial muscles (2)

A

Control bolus

Prevent spillage

33
Q

Important muscles of facial expression (2)

A

Orbicularis oris

Buccinator

BDS2 BAMS Oral Biology (14 decks)

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