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Anatomy Exam #2 > Chapter 11: Axial muscles > Flashcards

Chapter 11: Axial muscles Flashcards

0
Q

the more moveable (less stable) attachment point is called what?

A

insertion

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1
Q

the less moveable (more stable) attachment point is called what?

A

origin

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2
Q

the muscle that contracts during movement is called what?

A

agonist

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3
Q

assists agonist in generating movement force is called what?

A

synergist

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4
Q

relaxes during joint movement is called what?

A

antagonist

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5
Q

what is the origin, insertion, and action of the Frontal belly

A

O - epicranial aponeurosis
I - skin over supraorbital margin
A - wrinkle forehead, raise eyebrows

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6
Q

What is the origin, insertion and Action of the Orbicularis Oculi

A

O - medial wall of orbit
I - skin surrounding eyelids
A - blink/close eye

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7
Q

What is the origin, insertion and Action of the orbicularis oris

A

O - Maxilla and mandible
I - skin and muscles around mouth
A - close mouth, kiss

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8
Q

What is the origin, insertion and Action of the zygomaticus minor?

A

O - zygomatic bone
I - skin of superior lip
A - pulling up corner of the mouth (smiling)

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9
Q

What is the origin, insertion and Action of the zygomaticus major?

A

O - zygomatic bone
I - skin at superolateral edge of mouth
A - pulling up corner of the mouth (smiling)

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10
Q

What is the origin, insertion and Action of the depressor anguli oris?

A

O - body of mandible
I - skin at inferior corner of mouth
A - pulls corner of mouth down (frown)

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11
Q

What is the origin, insertion and Action of the masseter?

A

O - zygomatic arch
I - ramus part and angle of the mandible
A - elevation of the mandible

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12
Q

The insertion usually moves (towards/away) from the origin?

A

Towards

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13
Q

What muscles makes up the superficial suprahyoid group?

A

mylohyoid
stylohyoid
digastric

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14
Q

what muscles make up the superficial infrahyoid group?

A

Omohyoid

sternohyoid

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15
Q

what muscles make up the scalene group?

A

anterior, middle, posterior

16
Q

What is the origin, insertion, and action of the Sternocleidomastoid?

A

O - sternum, clavicle
I - mastoid process
A - unilateral : turning head left to right (contraction of right = head turns to the left)
Bilateral : flexion of the neck

17
Q

What is the origin, insertion, and action of the of the splenius capitis?

A

O - ligamentum nuchae
I - mastoid process and occipital bone
A - unilateral : turns head to the same side
bilateral : extends head

18
Q

What is the origin, insertion, and action of the splenius cervicis

A

O - ligamentum nuchae
I - mastoid process and occipital bone
A - unilateral : turn head left and right (contraction of right side muscle = head turns to the right)
bilateral : extension and hyperextension of neck

19
Q

What is the action of the diaphragm?

A

A - expansion of thoracic cavity space

20
Q

What is the origin, insertion, and action of the External Oblique?

A

O - ribs
I - iliac spine
A - unilateral : rotation of trunk (use left muscles = rotation to right or opp. side)
bilateral : flexion of the trunk “bending forward”
movement toward insertion

21
Q

What is the origin, insertion, and action of the Rectus Abdominus?

A

O - Pubis (superior ramus)
I - xiphoid process and ribs 5, 6, 7
A - Flexion of the trunk

22
Q

what muscles make up the Erector spinae “super group”

A

Spinalis
Longissimus
Iliocostalis

23
Q

What muscles are involved in breathing?

A 
Serratus Posterior Superior
Serratus Posterior Inferior
External Intercostals
Internal Intercostals
Diaphragm 
Scalenes
24
Q

What muscles are involved in chewing?

A

Temporalis
masseter
medial and lateral pterygoids

Anatomy Exam #2 (4 decks)

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