Muscles

Question 1

The pivot point of a lever (in many cases a joint)

Answer 1

Fulcrum

Question 2

1st Class (Definition)

Answer 2

Muscle effort and resistive force (load) act on opposite sides of fulcrum

Question 3

1st Class (Order)

Answer 3

Effort, fulcrum, load

Question 4

1st class (example);

Answer 4

Triceps Extension- Effort (triceps), fulcrum (elbow joint), load (weight in hands)

Question 5

2nd class (definition)

Answer 5

Load is in the middle between the fulcrum and the effort

Question 6

2nd class (order)

Answer 6

Fulcrum, load, effort (Least common)

Question 7

2nd class (example)

Answer 7

Calf raise- Fulcrum (ball of foot), load (weight of body), effort (gastrocnemius)

Question 8

3rd class (definition)

Answer 8

Effort is in the middle between fulcrum and load

Question 9

3rd class (order)

Answer 9

Fulcrum, effort, load (Most Common)

Question 10

3rd class (example)

Answer 10

-Bicep Curl- Fulcrum (elbow joint), effort (biceps), load (weight in hand)
-In this case, we are referencing the distal attachment (insertion) of the bicep

Question 11

Occipotofrontalis (epicranius)

Answer 11

Action= draw of the scalp posteriorly
-raises eyebrows and wrinkled the forehead (horizontally)

Question 12

Action = draw the eyebrows downward and medially
-Makes angry eyebrows and wrinkles the forehead (vertically)

Answer 12

Corrugator Supercilii

Question 13

Action = elevate and retract the eyelids
-Keeps the eyes open

Answer 13

Levator Palpebrae Superiorisi

Question 14

Close eyelids

Answer 14

Orbiularis Oculi

Question 15

Orbicularis Oris (Superficial)

Answer 15

closes lips, protrudes lips

Question 16

presses lips against teeth, important for speech production

Answer 16

Orbicularis Oris (Deep)

Question 17

raises upper lip and moves it forwards (shows upper teeth)

Answer 17

Levator Labii Superioris

Question 18

Depressor Labii Inferioris

Answer 18

draws lower lip inferiorioly and laterally (shows lower teeth)

Question 19

Levator Anguli Oris

Answer 19

Raises the angle of the mouth

Question 20

Depressor Anguli Oris

Answer 20

draws angle of the mouth downwards and laterally

Question 21

Buccinator

Answer 21

Compresses checks during the chewing process

Question 22

Risorius

Answer 22

Retracts the angle of the mouth

Question 23

Depresses the lower jaw

Answer 23

Platysma

Question 24

adducts, elevates, and internally rotates the eyes

Answer 24

Superior Rectus

Question 25

depresses and adducts the eyeball

Answer 25

Inferior Rectus

Question 26

Adducts and moves the eye medially

Answer 26

Medial Rectus

Question 27

Abducts and moves the eye laterally

Answer 27

Lateral Rectus

Question 28

medially rotates the eye (intorsion)

Answer 28

Superior Oblique

Question 29

Laterally rotates the eye (extortion)

Answer 29

Inferior Oblique

Question 30

Draws head toward shoulder of same side, rotates head to opposite side, flexes cervical spine assists in elevated the thorax

Answer 30

Sternocleidomastoid (R/L)

Question 31

Scalenes (R/L)

Answer 31

Elevates 1st and 2nd ribs tilt then neck to the same side

Question 32

Longissimus (Dorsi)

Answer 32

Extends & laterally flexes spine, aids in rib compression

Question 33

Longissimus (Cervicis)

Answer 33

Extends & laterally flexes spine

Question 34

Spinalis (Thoracis)

Answer 34

Extends spine

Question 35

Spinalis (Cervicis)

Answer 35

Extends Head

Question 36

Quadratus Lumborum

Answer 36

Depresses 12th rib, unilaterally raises pelvis, aids in lumbar spine lateral flexion, major stabilizer of lumbar spine

Question 37

Flexes vertebral column, tenses abdominal wall, compressed abdominal viscera

Answer 37

Rectus Abdominis

Question 38

External Oblique (Bilaterally)

Answer 38

Compresses abdomen and flexes the spine

Question 39

Internal Oblique (Bilaterally)

Answer 39

Compresses abdominal viscera and flexes the spine

Question 40

Internal Oblique (Unilaterally)

Answer 40

Laterally flexes and rotates spine to same side

Question 41

Stabilizes spine

Answer 41

Transversospinialis