Lab #4: Muscles of Upper Body Flashcards Preview

Human Anatomy > Lab #4: Muscles of Upper Body > Flashcards

Flashcards in Lab #4: Muscles of Upper Body Deck (31):
1

3 types of joint MOVEMENTS

1. Angular Movements

2. Circular Movements

3. Special Movements

2

4 types of Angular Movements

1. Flexion

2. Extension & Hyperextension

3. Adduction

4. Abduction

3

3 types of Flexion

1. Dorsiflexion

2. Plantar flexion

3. Lateral flexion

4

2 types of Circular Movements

1. Rotation

2. Circumduction

5

2 types of Rotation

1. Supination

2. Pronation

6

6 types of Special Movements (PRIeDE)

1. Protraction

2. Retraction

3. Inversion

4. Eversion

5. Depression

6. Elevation

7

Frontal Belly of Occipitofrontalis

Q image thumb

O: Frontal Bone & skin of eyebrows

I: Galea Aponeurotica

A: moves scalp, wrinkles forehead, elevates eyebrows

8

Occipital Belly of Occipitofrontalis

Q image thumb

O: Superior Nuchal Line

I: Galea Aponeurotica

A: moves scalp slightly posteriorly

9

Orbicularis Oris **

Q image thumb

O: Mandible & Maxillae, fascia & fibers from other facial muscles

I: skin & lips surrounding the mouth

A: closes lips, puckers up lips

*1st sphincter of digestive tract

*"kissing" muscle

10

Masseter *

Q image thumb

O: Zygomatic arch

I: lateral surface of coronoid process, lateral surface & angle of mandible

A: elevates & protracts mandible, prime mover of jaw closure

* feel contraction near angle of mandible when clenching teeth

11

Temporalis *

Q image thumb

O: superior & inferior portions of temporal bone

I: Coronoid process of mandible

A: elevates & retracts mandible

* palpate on temple while clenching teeth

12

Buccinator **

Q image thumb

O: alveolar processes of mandible & maxillae

I: Orbicularis Oris

A: compresses cheek, holds food between teeth, aids in sucking & blowing

* "trumpeter" muscle

*composes fleshy wall of cheeks

13

Medial & Lateral Pterygoids

Q image thumb

O: pterygoid processes of sphenoid bone

I: mandible

A: elevate & protract mandible, move it from side to side during chewing

14

Sternocleidomastoid *

Q image thumb

O: manubrium & sternal ends of clavicle

I: mastoid processes of temporal bones

A: both- head is pulled forward & down (flexion of cervical vertebrae & flexion of atlanto-occipital)

one- turns head sideways, in opposite direction of contracting muscle

* form lateral borders of suprasternal fossa

15

Platysma

Q image thumb

O: Fascia of deltoid & pectoralis major muscles, and acromion of scapula

          I:  Skin of cheek and mandible

            A: Pulls lower lip inferior, tenses skin of neck, contributes to depression of the mandible

16

Serratus Anterior *

Q image thumb

            O: Anterior and superior margins of upper ribs

            I:  Medial (vertebral) border of scapula & anterior surface of scapula

            A: Prime mover that protracts & depresses scapula (synergistic to pec. minor), stabilizes scapula, superiorly rotates scapula (glenoid cavity moves superior)

* "saw toothed" appearance

17

Pectoralis Minor *

Q image thumb

O: Sternal ends of upper ribs

            I:  Coracoid process of scapula

            A: Protracts & depresses scapula (Hunched over shoulders)

* deep to Pec. Major

18

simple movement in which two opposing surfaces slide slightly back-and-forth or side-to-side to one another and the angle between teh bones doesn't change

gliding

19

either increases or decreases angle between articulating bones

angular motion

20

movement in an anterior-posterior plane of the body that decreases the angle between bones

flexion

21

movements in an anterior-posterior plane that increases the angle between bones

extension

22

movement that typically returns body part to the anatomical position

extension

23

an angular motion in which the angle between the bones is >180

hyperextension

24

severe example of this motion occurs in tetanus and is termed "opisthotonos"

hyperextension

25

trunk of body moves in a coronal plane away from the body

lateral flexion

26

type of movement that occurs primarily between the vertebrae in cervical and lumbar regions of the vertebral column

lateral flexion

27

lateral movement of body part away from the body midline

abduction

28

medial movement of body part toward the body midline

adduction

29

sequence of movements in which the proximal part of the body remains relatively stationary while the distal part of the body makes a circular cone-like motion

circumduction

30

pivoting motion in which a bone turns on its own longitudinal axis

rotation

31