Chapter 11 - Muscle to know

Question 1

Orbicularis Oris

Origin, Insertion, Action

Answer 1

Origin- opening of mouth
Insertion- skin at corner of mouth
Action - closes and protrudes lips, shapes lips for speech

Question 2

Orbicularis Oculi

Origin, Insertion, Action

Answer 2

Origin - Medial wall of orbit
Insertion - circular path around orbit
action - closes eye

Question 3

Frontalis

Origin, Insertion, Action

Answer 3

Origin - Epicranial aponeurosis
Insertion - skin superior to supraorbital margin
action - draws scalp anteriorly, raises eyebrows

Question 4

Occipitalis

Origin, Insertion, Action

Answer 4

origin - occipital and temporal bones
insertion - epicranial aponeurosis
action - draws scalp posteriorly

Question 5

Temporalis

Origin, Insertion, Action

Answer 5

origin - temporal bone
insertion - mandible
action- elevates and retracts mandible

Question 6

Buccinator

Origin, Insertion, Action

Answer 6

origin - maxilla and mandible
insertion - orbicularis oris
action - presses cheek against teeth

Question 7

Masseter

Origin, Insertion, Action

Answer 7

origin -maxilla and zygomatic arch
insertion - mandible
action - elevates mandible

Question 8

Extrinsic Eye Muscles

Origin, Insertion, Action

Answer 8

origin - back of orbit
insertion - different parts of the eyeball
action- precise and rapid eye movements

Question 9

Sternocleidomastoid

Origin, Insertion, Action

Answer 9

origin- clavicle and sternum
insertion- temporal bone
action- flex and rotate the head

Question 10

Scalene Muscles

Origin, Insertion, Action

Answer 10

origin - cervical vertebrae
insertion - 1st and 2nd ribs
action - flex neck, elevate 1st and 2nd rib

Question 11

Splenis Capitis

Origin, Insertion, Action

Answer 11

origin - C7-T4
insertion - occipital and temporal bones
action- flex neck, elevate 1st and 2nd rib

Question 12

Erector Spinae

Origin, Insertion, Action

Answer 12

origin- ribs and illiac crest
insertion - ribs
action - extend and maintain erect posture

Question 13

Pectoralis Minor

Origin, Insertion, Action

Answer 13

origin - 2nd - 5th ribs
insertion - scapula
action - abducts scapula, and rotates it downward

Question 14

Pectoralis Major

Origin, Insertion, Action

Answer 14

origin - clavicle and sternum
insertion - proximal humerus
action - adducts and medially rotates the arm at the shoulder joint

Question 15

Lastissimus Dorsi

Origin, Insertion, Action

Answer 15

origin - spines of T7-L5 and iliac bone
insertion - mid humerus
action - drives are anteriorly and posteriorly

Question 16

Biceps Brachii

Origin, Insertion, Action

Answer 16

origin- scapula
insertion - radius
action - flexes forearm at elbow joint and flexes arm at shoulder joint

Question 17

Diaphragm

Origin, Insertion, Action

Answer 17

origin- Xiphoid Process, inferior 6 ribs, lumbar vertebrae
insertion - central tendon
action -normal inhalation

Question 18

External Intercostals

Origin, Insertion, Action

Answer 18

origin- inferior border or rib above
insertion - superior border of rib below
action - normal breathing

Question 19

Internal intercostals

Origin, Insertion, Action

Answer 19

origin- superior border or rib below
insertion - inferior border of rib above
action - deep breathing

Question 20

Trapezius

Origin, Insertion, Action

Answer 20

origin- occipital bone and cervical spine
insertion - clavicle and acromion and scapula spine
action- moves scapula up, down, in, and out

Question 21

Deltoid

Origin, Insertion, Action

Answer 21

origin- clavicle and upper scapula
insertion- humerus
action- abducts, flexes, and medially rotates the upper arm

Question 22

Rectus abdominus

Origin, Insertion, Action

Answer 22

origin-pubic bone
insertion- ribs 5-7 and xiphoid process
action - flexes vertebral column, compresses abdomen

Question 23

External Oblique

Origin, Insertion, Action

Answer 23

origin - ribs 5-12
insertion - iliac crest and linea alba
action- compresses abdomen and sideways bending

Question 24

Internal Oblique

Origin, Insertion, Action

Answer 24

origin- iliac crest, inguinal ligament, lumbar fascia
insertion- ribs 7-10 and linea alba
action- compresses abdomen and sideways bending

Question 25

Triceps Brachii | Origin, Insertion, Action

Answer 25

origin- scapula and posterior surface of humerus insertion- olecranon process of ulna action- extends forearm at elbow joint and arm at shoulder joint

Question 26

Brachioradialis | Origin, Insertion, Action

Answer 26

origin- humerus insertion- distal radius action- supinates forearm at the radioulnar joint

Question 27

Thenar | Origin, Insertion, Action

Answer 27

origin- wrist tendons insertion- thumb action - oppose thumb

Question 28

Hypothenar | Origin, Insertion, Action

Answer 28

origin- wrist tendons insertion- little finder action- oppose thumb

Question 29

Urinary Sphincter | Origin, Insertion, Action

Answer 29

origin- Ischial and Pubic Rami insertion- median raphe (male), vaginal wall (female) action - help expel urine

Question 30

External Anal Sphincter | Origin, Insertion, Action

Answer 30

origin- anococcygeal ligament insertion- perineal body of perineum action- keeps anal canal and anus closed

Question 31

Levator ani | Origin, Insertion, Action

Answer 31

origin- pubis and ischial spine insertion- coccyx action- supports and maintains position of pelvic viscera

Question 32

Gluteus Maximus | Origin, Insertion, Action

Answer 32

origin- iliac crest, saccrum, coccyx insurtion- femur action- extends thigh at hip joint

Question 33

Gluteus Minimus | Origin, Insertion, Action

Answer 33

origin- illium insertion- femur action- abducts thigh at hip joint, rotates thigh medially

Question 34

Gluteus Minimus | Origin, Insertion, Action

Answer 34

origin- ilium insertion- femur action- abducts thigh at hip joint, rotates thigh medially

Question 35

Psoas Major | Origin, Insertion, Action

Answer 35

origin- lumbar vertebrae insertion- femur action- flex thigh at hip joint, laterally rotate thigh, flex trunk on hip

Question 36

Iliacus | Origin, Insertion, Action

Answer 36

origin- iliac crest, saccrum insertion- femur action- flex thigh at hip joint, laterally rotate thigh, flex trunk on hip

Question 37

What muscles combine together to form the Quadricep Group?

Answer 37

rectus femoris vastus lateralis vastus intermedius vastus medialis

Question 38

Quadricep Group | Origin, Insertion, Action

Answer 38

origin- iliac spine and proximal femur insertion- patella and proximal tibia action- flexes thigh at hip joint, and extends leg at knee joint

Question 39

Adductors | Origin, Insertion, Action

Answer 39

origin- pubis insertion- femur action- adducts and flexes thigh at hip joint and rotates thigh

Question 40

what muscle groups combine together to form the Hamstring group?

Answer 40

biceps femoris semitendinosus semimembranosus

Question 41

Hamstring Group | Origin, Insertion, Action

Answer 41

origin- Ischial tuberosity insertion- proximal tibia and fibula action- flexes leg at knee joint and extends thigh at hip joint

Question 42

Tibialis anterior | Origin, Insertion, Action

Answer 42

origin- tibia insertion- first cuneiform and first metatarsal action- dorsiflexes and inverts foot

Question 43

What muscles combine to form the Gastrocsoleus

Answer 43

gastrocnemius and soleus muscles

Question 44

Gastrocsoleus | Origin, Insertion, Action

Answer 44

origin- femur, capsule of knee, head of fibula insertion - calcaneus action- plantar flexes foot