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A215 Lecture > Muscles of Head, Neck, and Trunk > Flashcards

Muscles of Head, Neck, and Trunk Flashcards

1
Q

What is the epicranial aponeuosis

A

it is the tendon that connects the frontalis to the occipitalis

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2
Q

Function: Frontal belly

A

elevate eyebrows and wrinkles forehead skin

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3
Q

Function: Occipital belly

A

Retracts scalp slightly

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4
Q

Function: Orbicularis Occuli

A

close eye

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5
Q

Function: Orbicularis Oris

A

closes and purses lips

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6
Q

Function: Zygomatic major

A

elevates corner of mouth

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7
Q

Function: depressor angulioris

A

depresses corner of mouth

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8
Q

Function: Buccinator

A

pulls cheeks against teeth when chewing

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9
Q

Function: Platysma

A

tenses the skin of neck and depresses lower lip

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10
Q

Function: Masseter

A

elevates and protracts mandible

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11
Q

Function: Temporalis

A

elevates and retracts mandible

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12
Q

Function: medial pteryoid

A

elevates and protracts mandible
moves mandible side to side

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13
Q

Function: Lateral pterygoid

A

elevates and protracts mandible
moves mandible side to side

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14
Q

Function: genioglossus

A

protracts(proturdes) tongue

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15
Q

Function: Styloglosses

A

elevates and retracts tongue

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16
Q

Function: hyoglossus

A

depresses and retracts tongue

17
Q

Function: sternocleidomastoid

A

rotates head side to side
together: flex the head/neck

18
Q

Function: Splenius Capitis

A

rotates head side to side
together: extend the head/neck

19
Q

Function: Digastric

A

elevates hyoid
depresses mandible

20
Q

Function: Stylohyoid

A

elevates hyoid bone

21
Q

Function: Mylohyoid

A

elevates hyoid bone
raises floor of mouth

22
Q

Function: Sternohyoid

A

depresses hyoid bone

23
Q

Function: Omohyoid

A

Depresses hyoid bone

24
Q

Function: Sternothyroid

A

Depresses thyroid cartilage

25
Q

Function: Thyrohyoid

A

depresses hyoid bone
raises thyroid cartilage

26
Q

Function: Quadratus Lumborum

A

together: extend lumbar vert. column
unilaterally: laterally flex vert. column

27
Q

where is the quadratus lumborum

A

iliac crest to the vert. column

28
Q

Function: Erector Spinae

A

extend vert. column

29
Q

Iliocostalis

A

most lateral erector spinae

30
Q

Longissimus

A

intermediate erector spinae

31
Q

Spinalis

A

most medial erector spinae

32
Q

Function: Diaphragm

A

contraction pulls the central portion down
increases vertical dimensions of the thorax

33
Q

Function: External Intercostals

A

elevates the rib cage on inhalation

34
Q

Function: Internal Intercostals

A

depresses ribs during forced exhalation

A215 Lecture (10 decks)

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