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OMC IV, Module I > 1. Mastication > Flashcards

1. Mastication Flashcards

1
Q

Mastication

The ____ step in digestion Breaks down food
Increases ____
Mixes saliva and enzymes

A

first

surface area

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2
Q

Mastication

Involves ____, neuronal control, teeth and occlusion
A regulated and complicated ____ control system
Coordinates ____ movements

A

bone/soft tissue/muscles
neurologic
muscle

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3
Q

Muscles of mastication

\_\_\_\_ Muscle
\_\_\_\_ Muscle
\_\_\_\_ Muscle
\_\_\_\_ Muscle 
\_\_\_\_ Muscles of Mastication
A 
masseter
temporalis
medial pterygoid
lateral pterygoid
accessory
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4
Q

Masseter Muscle

Origin-
Superficial- ____ of maxilla and ____ of the zygomatic arch
Deep- ____ of zygomatic arch

Insertion-
Superficial- angle of the ____, lower lateral ____
Deep- upper portion of ____

A

zygomatic process
inferior border of anterior 2/3
inner and inferior border of posterior 1/3

mandible
ramus
lateral ramus

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5
Q

Masseter muscle - actions

  • ____
  • ____ excursion
  • ____
A

elevation
ipsilateral
retrusion

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6
Q

Masseter muscle

Blood Supply- ____ Artery Innervation- ____

A

masseteric

masseteric branch of CNV3

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7
Q

Temporalis muscle

Origin- Inferior ____, temporal fossa, ____

Insertion- medial portion of ____ and anteromedial border of ____

A

temporal line
temporal fascia

coronoid process
ramus

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8
Q

Temporalis muscle - actions

  • ____
  • ____
  • ____ excursion
A

elevation
retrusion
ipsilateral

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9
Q

Temporalis muscle

Blood Supply- ____ arteries
Innervation- ____

A

anterior, posterior deep temporal

deep temporal nerve from CNV3

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10
Q

Medial Pterygoid muscle

Origin- ____ plate

Insertion- Medial aspect of mandibular ____ and angle of ____

A

medial aspect of lateral pterygoid

ramus
mandible

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11
Q

Medial pterygoid muscle - actions

  • ____ of mandible
  • ____
  • ____ excursion
A

elevation
protrusion
contralateral

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12
Q

Medial pterygoid

Blood supply- ____
Innervation- ____

A

pterygoid branch of maxillary artery

mandibular branch of CNV3

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13
Q

Lateral pterygoid muscle

Origin
Inferior head- ____ plate
Superior head- ____ fossa

Insertion
Inferior head- ____ of condylar neck
Superior head- capsule and disc of ____

A

lateral aspect of lateral pterygoid
roof of infratemporal

pterygoid fovea
TMJ

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14
Q

Lateral pterygoid muscle - actions

  • ____
  • ____
  • ____ excursion
A

protrusion
depression
contralateral

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15
Q

Lateral pterygoid

Blood Supply- ____ artery
Innervation- ____

A

pterygoid branch of maxillary

pterygoid branch of CNV3

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16
Q

Accessory muscle of mastication

Suprahyoid 
\_\_\_\_
\_\_\_\_ 
\_\_\_\_ 
\_\_\_\_
Infrahyoid 
\_\_\_\_
\_\_\_\_ 
\_\_\_\_ 
\_\_\_\_
A

digastrics
mylohyoid
geniohyoid
stylohyoid

omohyoid
sternohyoid
sternothyroid
thyrohyoid

17
Q

Temporomandibular joint

Temporal bone
____
____

Mandible
____

Joint capsule
TMJ disc

A

articular fossa
articular eminence
condyle

18
Q

Brain/brainstem

Spinal tract nucleus
\_\_\_\_ input from the face and mouth via \_\_\_\_ (trigeminal) nerve.
Subnucleus \_\_\_\_ (oral pain) 
Subucleus \_\_\_\_ 
Subnucleus \_\_\_\_

Trigeminal motor nucleus
____ motor signals

A

afferent
CNV

oralis
interpolaris
caudalis

efferent

19
Q

Muscle spindles

Monitors ____
____ feeding of state of ____ and ____

A

length
constant
elongation
contraction

20
Q

Golgi tendon organs

Located in the ____ between the muscle and bone
Monitor ____ of muscle

A

tendon

tension

21
Q

Pacinian corpuscles

____ of connective tissue
Movement ____ and firm pressure
Found in ____, joints, ____, tissue, fascia

A

concentric lamellae
perception
tendons
periosteum

22
Q

Nociceptors

\_\_\_\_ receptors
Stimulated by \_\_\_\_
Tactile to \_\_\_\_
\_\_\_\_ touch, pressure, mechanoreceptor
Monitors \_\_\_\_, condition and \_\_\_\_ of tissue in the masticatory system
A 
sensory
injury
noxious
light
position
movement
23
Q

Regulation of mastication

Sensory receptor input to the ____
CNS processes and creates motor function through ____ fibers
____ of some muscle groups, ____ of others

A

CNS
efferent
contraction
inhibition

24
Q

Central pattern generator (CPG)

Neurons in the brainstem that controls ____ muscle activities such as ____, swallowing, walking, breathing.
It determines the activity and timing of ____ muscles
A ____ process but can be brought to ____ control at any time

A 
rhythmic
chewing
antagonistic
subconscious
conscious
25
Q

Central pattern generator (CPG)

For chewing, it initiates contraction of muscles that ____ the mouth while inhibiting those that ____ the mandible
Next it causes contraction of ____ muscles while inhibiting those that ____ the mouth
Receives sensory input and then determines most efficient ____
Chewing is ____ but can be brought to ____ control at any time

A 
open
elevate
elevator
open
chewing
subconscious
conscious
26
Q

Chewing stroke

Rhythmic opening and closing of dentition under control of the \_\_\_\_.
\_\_\_\_ is a chewing stroke
Opening phase
Closing phase 
--\_\_\_\_ phase 
--\_\_\_\_ phase
A

CPG
open and closing
crushing
grinding

27
Q

Frontal chewing stroke

Opening phase
Mandible drops downward to ____mm
Lateral ____mm

A

16-18

5-6

28
Q

Crushing phase

Traps food between the teeth
As teeth come together, the ____ displacement is decreased.
At ____mm apart, the jaw is lateral ____mm

A

lateral
3
3-4

29
Q

Grinding phase

Teeth positioned where mandibular ____ cusps are directly under maxillary buccal cusps
Teeth come together and are guided back to ____ along ____ inclines, causing grinding

A

buccal
intercuspation
cuspal

30
Q

Forces

Females- ____ lbs
Males- ____ lbs

1st molar- ____ lbs
Incisors- ____ lbs

A

79-99
118-142

91-198
29-51

31
Q

Teeth

Incisors
\_\_\_\_ food, cuts pieces of food
Canines
\_\_\_\_ of food
Premolars
Tearing and \_\_\_\_
Molars
\_\_\_\_ of food
A

incise
tearing
grinding
grinding

32
Q

Maximal intercuspation

Where the cusps of the maxillary teeth and mandibular teeth fully ____

A

interpose

33
Q

Angle’s classification

Class I
MB cusp of maxillary 1st molar in the ____ groove of the ____ mandibular ____

Maxillary canine occludes between the mandibular ____ and ____

A

MB
first
molar

canine
premolar

34
Q

Angle’s classification

Class II
MB cusp of maxillary 1st molar is ____ to the ____ groove of the 1st mandibular ____

Maxillary canine occludes ____ to the mandibular canine and premolar space

A

mesial
MB
molar
mesial

35
Q

Angle’s classification

Class III
MB cusp of maxillary 1st molar is ____ to the MB groove of the 1st mandibular ____
Maxillary canine occludes ____ to the mandibular canine and premolar space

A

distal
molar
distal

36
Q

Malocclusion

Posterior ____
____

A

crossbite

apertognathia

37
Q

Mastication

Involves bone/soft tissue/muscles, neuronal control, teeth and occlusion
A ____ and complicated neurologic control system
Coordinates ____ movements

A

regulated

muscle

OMC IV, Module I (6 decks)

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