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mt 13 lec > muscular system > Flashcards

muscular system Flashcards

1
Q

All are superficial muscles
they insert into the overlying skin
they develop from the branchial arches
innervated by the facial nerve

A

MUSCLES OF THE FACE

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2
Q

inserts into the RADIUS originates in the SCAPULA

A

biceps muscle

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3
Q

inserts into the BONE originates from ANOTHER BONE

A

muscle

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4
Q

inserts on SKIN originates on a BONE

A

facial muscle

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5
Q

muscles of the face

A

frontalis
orbicularis oculi
orbicularis Oris
buccinator
zygomaticus
platysma

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6
Q

● Origin: frontal bone
● Insertion: skin of eyebrows
● Action: raises eyebrows, wrinkles forehead

A

frontalis

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7
Q

● Origin: bony orbit (eye socket)
● Insertion: eyelids
● Action: closes the eyelids
○ squinting, blinking, winking

A

orbicularis oculi

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8
Q

● Origin: maxilla and mandible
● Insertion: lips
● Action: puckers the lips

A

orbicularis oris

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9
Q

osculate

A

kissing

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10
Q

prevents contracting the frontalis
■ (temporary) prevents
contraction, prevents wrinkling

A

botox

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11
Q

when a muscle shortens, it pulls
the insertion towards the origin

A

kissing

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12
Q

trumpeter or buccal

A

buccinator

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13
Q

● Origin: molar regions of the maxilla and
mandible - towards the back
● Insertion: cheek - blowing and sucking
● Action: compresses the cheeck, as when
blowing and sucking

A

buccinator

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14
Q

● Origin: zygomatic bone
● Insertion: skin at corners of mouth
● Action: smiling (raises corners of mouth) - pull
corners of the mouth upwards

A

zygomaticus

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15
Q

● Origin: fascia of chest - originates from skin,
inserts on bone
● Insertion: mandible
● Action: pulls the lower lip and jaw downwards

A

platysma

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16
Q

EXTRINSIC MUSCLES OF THE EYE

A

superior rectus
inferior rectus
medial rectus
lateral rectus

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17
Q

means straight

A

rectus

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18
Q

● elevates the eye
● rotates the eye towards the ceiling and move
your head

A

superior rectus

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19
Q

● depresses the eye
● antagonist of superior rectus

A

inferior rectus

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20
Q

● rotates the eye medially
● towards the midline

A

medial rectus

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21
Q

● rotates the eye laterally

A

lateral rectus

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22
Q

rotates
the eye down and laterally

A

superior oblique

23
Q

rotates eye up and laterally

A

inferior oblique

24
Q

General Characteristics
1. They develop from the Branchial Arches
2. They are innervated by the trigeminal nerve -
most important nerve for dentists

A

muscles of mastication

25
Q

most important nerve for dentists

A

trigeminal nerve

26
Q

MUSCLES OF MASTICATION

A

temporalis and masseter

27
Q

● Origin: temporal bone
● Insertion: mandible
● Action: elevates mandible, and thus closes the
jaw

A

temporalis

28
Q

○ very powerful muscle

A

masseter

29
Q

● Origin: zygomatic arch
● Insertion: mandible
● Action: chewing

A

masseter

30
Q
  1. They develop from the occipital somies
  2. They are innervated by the hypoglossal nerve
A

MUSCLES OF THE TONGUE

31
Q

MUSCLES OF THE TONGUE

A

intrinsic muscle and extrinsic muscle

32
Q

● located entirely within the tongue

A

intrinsic muscle

33
Q

kinds of muscle fibers in intrinsic muscles

A

longitudinal muscle fibers
vertical muscle fibers
transverse (horizontal) muscle fibers

34
Q

lengthwise from front to back

A

longitudinal muscle fibers

35
Q

up and down

A

vertical muscle fibers

36
Q

their origin is outside the tongue; inserts into
tongue

A

extrinsic muscle

37
Q

sticks the tongue out or
protracts or protrudes the tongue

A

genioglossus

38
Q

retracts the tongue -
antagonist of the genioglossus
■ originates from the styloid
process of the temporal bone

A

styloglossus

39
Q

true or false
muscles are antagonistic

A

true

40
Q

General Characteristics
1. They develop from the Branchial Arches
2. They are innervated by the Glossopharyngeal
Nerve

A

MUSCLES OF THE PHARYNX (THROAT)

41
Q

MUSCLES OF THE PHARYNX (THROAT)

A

thick outer layer of constrictor muscle
thin inner layer of longitudinal muscle

42
Q

● contracts, narrows the throat
● forces food into the esophagus
● Ex: constrictor pharyngis

A

thick outer layer of Constrictor muscles

43
Q

● elevates the soft palate
● closing off the nasopharynx from the
oropharynx, during deglutition

A

thin inner layer of longitudinal muscles

44
Q

OTHER MUSCLES

A

Suprahyoid bone
Trapezius muscle
Rhomboideus
serratus anterior

45
Q

Origin: mandible
● Insertion: hyoid bone
○ U-shaped bone under our jaw
● Action: elevates the hyoid bone and base of
tongue during swallowing
● They are all innervated by the trigeminal nerve

A

suprahyoid bone

46
Q

major prime mover of our back and shoulders
○ stiff neck, massage

A

trapezius

47
Q

● Origin: Vertebrae
● Insertion: Clavicle and Scapula
● Action: Elevates and adducts shoulder

A

trapezius

48
Q

Classifications of trapezius muscles

A

● Clavotrapezius
● Acromiotrapezius
● Spinotrapezius

49
Q

raises shoulder up

A

Clavo trapezius

50
Q

brings your shoulder to the
midline

A

Acromiotrapezius

51
Q

to lower our shoulders

A

spinotrapezius

52
Q

● Origin: Vertebrae
● Insertion: Scapula
● Action: adducts shoulder
○ helper muscles or synergists

A

rhomboideus

53
Q

● Origin: Ribs
● Insertion: Scapula
● Action: pulls shoulder down
○ helper muscles or synergists

A

serratus anterior

mt 13 lec (2 decks)

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