Wk 8 Lab

Question 1

Origin

Answer 1

More stationary attachment point of a muscle

Question 2

Insertion

Answer 2

More mobile attachment point of a muscle

Question 3

Aponeurosis

Answer 3

broad, flat, sheet-like tendon connecting muscles to bone or other muscles

Question 4

Epicranius frontalis origin, insertion, and action

Answer 4

Origin: aponeurosis
Insertion: skin of eyebrows
Action: raises eyebrows

Question 5

Epicranius occipitalis origin, insertion, and action

Answer 5

Origin: occipital bone
Insertion: aponeurosis
Action: pulls scalp posteriorly

Question 6

Orbicularis oculi origin, insertion, and action

Answer 6

Origin: frontal, maxilla
Insertion: skin of eyelid
Action: closes eyelid

Question 7

Temporalis origin, insertion, and action

Answer 7

Origin: temporal fossa
Insertion: coronoid process - mandible
Action: elevates and retracts mandible

Question 8

Masseter origin, insertion, and action

Answer 8

Origin: zygomatic arch - maxilla
Insertion: angle and ramus - mandible
Action: elevates mandible

Question 9

Buccinator origin, insertion, and action

Answer 9

Origin: molar region - mandible, maxilla
Insertion: orbicularis oris
Action: compresses cheek

Question 10

Orbicularis oris origin, insertion, and action

Answer 10

Origin: maxilla, mandible
Insertion: skin of mouth
Action: closes lips

Question 11

Zygomaticus major and minor origin, insertion, and action

Answer 11

Origin: zygomatic bone
Insertion: skin/muscle at corners of mouth
Action: elevates corners of mouth

Question 12

Risorius origin, insertion, and action

Answer 12

Origin: fascia of masseter
Insertion: skin at angle of mouth
Action: draws corners of lips laterally

Question 13

Sternocleidomastoid origin, insertion, and action

Answer 13

Origin: manubrium, clavicle
Insertion: mastoid process - temporal
Action: flexes neck, head rotation

Question 14

Anterior, middle, and posterior scalenes origin, insertion, and action

Answer 14

Origin: transverse process
Insertion: ribs 1 and 2
Action: rotate neck, elevate ribs

Question 15

Levator scapulae origin, insertion, and action

Answer 15

Origin: transverse process
Insertion: scapula
Action: elevates and adducts scapula

Question 16

Trapezius origin, insertion, and action

Answer 16

Origin: occipital
Insertion: acromion, spine
Action: extend neck, raise, rotate, and adduct scapula

Question 17

Latissimus dorsi origin, insertion, and action

Answer 17

Origin: spinous process - T6-L5, ribs 8-12
Insertion: humerus
Action: extend, adduct, medially rotate arm

Question 18

Rhomboid major origin, insertion, and action

Answer 18

Origin: spinous process T3-T5
Insertion: medial scapula
Action: retract and stabilize scapula

Question 19

Rhomboid minor origin, insertion, and action

Answer 19

Origin: spinous process C7-T1
Insertion: medial scapula
Action: retract and stabilize scapula

Question 20

Serratus anterior origin, insertion, and action

Answer 20

Origin: ribs 1-8
Insertion: medial scapula
Action: scapula forward and lateral rotation

Question 21

Erector spinae origin, insertion, and action

Answer 21

Origin: transverse process C7-T12
Insertion: occipital bone, cervical vertebrae
Action: extend neck and vertebral column

Question 22

Diaphragm origin, insertion, and action

Answer 22

Origin: xiphoid process; ribs
Insertion: diaphragm tendon
Action: mover of inspiration

Question 23

External intercostals origin, insertion, and action

Answer 23

Origin: inferior border of superior rib
Insertion: superior border of inferior rib
Action: elevate rib cage, inspiration

Question 24

Internal intercostals origin, insertion, and action

Answer 24

Origin: superior border of inferior rib
Insertion: inferior border of superior rib
Action: depress rib cage, expiration

Question 25

Pectoralis major origin, insertion, and action

Answer 25

Origin: clavicled, sternum, ribs 1-6
Insertion: humerus
Action: flex, medial rotation and adduction of arm

Question 26

Pectoralis minor origin, insertion, and action

Answer 26

Origin: ribs 3-5
Insertion: coracoid process
Action: elevate ribs and sacupla forward

Question 27

Rectus abdominus origin, insertion, and action

Answer 27

Origin: pubic crest, pubic symphysis
Insertion: xiphoid process, rib cartilage 5-7
Action: flex and rotate vertebral column

Question 28

External oblique origin, insertion, and action

Answer 28

Origin: anterior ribs 5-12
Insertion: pubic crest and tubercle, iliac crest
Action: trunk rotation, lateral flexion, depress ribs

Question 29

Internal oblique origin, insertion, and action

Answer 29

Origin: iliac crest
Insertion: ribs 9-12, pubic crest
Action: trunk rotation, lateral flexion, depress ribs

Question 30

Transverse abdominis origin, insertion, and action

Answer 30

Origin: iliac crest, cartilages of ribs 6-12
Insertion: pubic crest
Action: compress abdomen