10. Musculatory II and Nervous I (CNS) Flashcards Preview

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Flashcards in 10. Musculatory II and Nervous I (CNS) Deck (203)
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1

Muscles of mastication are innervated by

CN V3

2

Fan shaped muscle

Temporalis

3

Temporalis
Origin:
Insertion:
Action:
- Anterior or vertical fibers:
- Posterior or horizontal fibers:

Temporalis
Origin: temporal bone
Insertion: coronoid process and ramus(lat side)
Action:
- Anterior or vertical fibers: elevates mn
- Posterior or horizontal fibers: retracts mn

4

Only muscle that retracts the mandible

Posterior fibers of TEMPORALIS

5

Muscles of Mastication that elevates mandible

TIM

6

Internal pterygoid is aka

Medial pterygoid

7

External pterygoid is aka

Lateral pterygoid

8

Internal/Medial Pterygoid
Origin:
Insertion:
Action:

Internal/Medial Pterygoid
Origin: medial surface of the lateral pterygoid plate of the sphenoid bone
Insertion: ramus(medial side) and angle of mn
Action: Elevates mn and Bennett movt

9

Masseter
Origin:
Insertion:
Action:

Masseter
Origin: maxilla and zygomatic arch
Insertion:angle of mn and ramus(Lateral)
Action: Elevates mn

10

External/Lateral Pterygoid
Origin:
Insertion:
Action: (3)

External/Lateral Pterygoid
Origin: lateral surface of the lateral pterygoid plate of the sphenoid bone
Insertion: TMJ/Condyle
Action:
- Depresses mn
- Bennett movt
- Protrudes mn

11

Only muscle of mastication for mouth opening or depression of mandible

Lateral or external pterygoid

12

What is the major muscle for mouth opening

Anterior belly of digastric muscle

13

Anterior belly of digastric muscle is innervated by

CN V3

14

What innervates the POSTERIOR BELLY of digastric muscle

CN VII - Facial nerve

15

Moves tongue inferiorly and anteriorly

Genioglossus

16

Genioglossus
Origin: (first word before glossus)
Insertion:
Action:

Genioglossus
Origin: genial tubercle
Insertion: tongue
Action: moves tongue inf and ant

17

Styloglossus
Origin: (first word before glossus)
Insertion:
Action:

Styloglossus
Origin: styloid process of temporal bone
Insertion: tongue
Action: moves tongue sup and post

18

Hyoglossus
Origin: (first word before glossus)
Insertion:
Action:

Hyoglossus
Origin: hyoid bone
Insertion: tongue
Action: moves tongue inferiorly

19

Extrinsic muscles: Genioglossus/Styloglossus/Hyoglossus EXCEPT PALATOGLOSSUS are innervated by

CN XII Hypoglossal nerve

20

What innervates palatoglossus

Pharyngeal plexus (9/10/11)
IX - Glossopharyngeal
X - vagus
XI - Accessory

21

Palatoglossus
Origin:
Insertion:
Action:
- tongue:
- palate:

Palatoglossus
Origin: soft palate
Insertion: tongue
Action:
- moves tongue sup towards palate
- moves palate inf towards tongue

22

Mneumonic for INTRINSIC TONGUE MUSCLES (beq:except)

VITS
Vertical
Inferior longitudinal
Transverse
Superior longitudinal

23

Intrinsic muscles of tongue
Origin:
Insertion:
Action:

Intrinsic muscles of tongue
Origin: tongue
Insertion: tongue
Action: changes shape of tongue

24

Changes action of tongue

Extrinsic muscles of tongue

25

Changes shape of tongue

Intrinsic muscles of tongue (VITS)

26

Flattens and broadens tongue

Vertical

27

Shortens and thickens tongue (2)

Inf longitudinal
Sup longitudinal

28

Elongates and narrows tongue

Transverse

29

What innervates the intrinsic muscles of tongue (VITS)

CN XII Hypoglossal nerve

30

4 suprahyoid muscles

Digastric muscle - ant and post belly
Mylohyoid
Stylohyoid
Geniohyoid