Chapter 11: Axial muscles Flashcards Preview

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

Flashcards in Chapter 11: Axial muscles Deck (25):
0

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

origin

1

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

insertion

2

the muscle that contracts during movement is called what?

agonist

3

assists agonist in generating movement force is called what?

synergist

4

relaxes during joint movement is called what?

antagonist

5

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

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

6

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

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

7

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

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

8

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

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

9

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

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

10

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

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

11

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

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

12

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

Towards

13

What muscles makes up the superficial suprahyoid group?

mylohyoid
stylohyoid
digastric

14

what muscles make up the superficial infrahyoid group?

Omohyoid
sternohyoid

15

what muscles make up the scalene group?

anterior, middle, posterior

16

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

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

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

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

18

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

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

What is the action of the diaphragm?

A - expansion of thoracic cavity space

20

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

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

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

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

22

what muscles make up the Erector spinae "super group"

Spinalis
Longissimus
Iliocostalis

23

What muscles are involved in breathing?

Serratus Posterior Superior
Serratus Posterior Inferior
External Intercostals
Internal Intercostals
Diaphragm
Scalenes

24

What muscles are involved in chewing?

Temporalis
masseter
medial and lateral pterygoids