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Anatomy Exam 2 > Chapter 11: Axial Skeletal Muscles > Flashcards

Chapter 11: Axial Skeletal Muscles Flashcards

1
Q

less movable (more stable) attachment point

A

origin

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2
Q

more movable (less stable) attachment point

A

insertion

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3
Q

muscle that contracts during movement

A

agonist

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4
Q

assists agonist in generating movement

A

synergist

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5
Q

relaxes during joint movement

A

antagonist

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6
Q

frontal belly of occipitofrontalis function

A

moves scalp, eyebrows; wrinkles skin of forehead

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7
Q

frontal belly of occipitofrontalis origin & insertion

A

origin- epicranial aponeurosis
insertion- eyebrow skin

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8
Q

depressor anguli oris function

A

“frown” muscle

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9
Q

depressor anguli oris origin & insertion

A

origin- body of mandible
insertion- skin at inferior corner (angle) of mouth

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10
Q

zygomaticus major function

A

“smile” muscle

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11
Q

zygomaticus major origin & insertion

A

origin- zygomatic bone
insertion- skin at superolateral edge of mouth

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12
Q

masseter function

A

prime mover of jaw closure

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13
Q

masseter origin & insertion

A

origin- zygomatic arch
insertion- ramus (lateral surface) & angle of mandible

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14
Q

sternocleidomastoid function

A

unilateral action: lateral flexion
bilateral action: flexes neck

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15
Q

splenius capitis function

A

unilateral action: turns head to same side
bilateral action: extends head/neck

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16
Q

splenius capitis origin & insertion

A

origin- ligamentum nuchae & spinous processes of c7-t3
insertion- occipital bone and mastoid process of temporal bone

17
Q

external oblique function

A

unilateral action: lateral flexion of vertebral column
bilateral action: forced exhalation

18
Q

external oblique origin & insertion

A

origin- external & inferior borders of the inferior 8 ribs
insertion- linea alba, some to iliac crest

19
Q

rectus abdominis function

A

forced exhalation

20
Q

rectus abdominis origin & insertion

A

origin- superior surface of pubis near symphysis
insertion- xiphoid process of sternum

Anatomy Exam 2 (4 decks)

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