Muscles of the Body

Question 1

Obicularis Oculi

Answer 1

O: Round muscle around the eye
A: Closing the eye

Question 2

Obicularis Oris

Answer 2

Round muscle around the lips
A: Lip pursing

Question 3

Frontalis

Answer 3

O: Attached to the frontal lobe
A: raises eyebrows

Question 4

Buccinator

Answer 4

Underneath eyes and masseter
A: pulls cheeks in (fish face).

Question 5

Zygomaticus

Answer 5

O:Attached to the zygomatic bone
A: Pulls up corners of your mouth (smile)

Question 6

Depressor labii inferiors

Answer 6

V below the lower lip
A: Pulls the lower lip down

Question 7

Temporalis

Answer 7

O: Temporal bone
I: Mandible
A: Closing the mouth + pulling the mandible back

Question 8

Masseter

Answer 8

big muscle posterior jaw that runs up + down,
I: Mandible
A: raises mandible, most important for chewing in humans, pulls mandible forward

Question 9

Sternocleidomastoid

Answer 9

Big muscle in the neck going at an angle
O: Sternum
I: Temporal bone
A: flexes neck - if one contracts the neck is pulled to the side

Question 10

Platysma

Answer 10

Flat muscle in front of the neck, on top of the sternocleidomastoid
A: pulls down corners of lips (chinz face)

Question 11

Pectoralis Major

Answer 11

O: Pones of the chest
I: Lateral end of humerus
A: Adducts & flexes arm

Question 12

Pectoralis minor

Answer 12

A: Stabilizes the scapula

Question 13

External Intercostal Muscles

Answer 13

O: Ribs 1-11
I: Immediately below the origin
A: Expanding the rib cage to breathe

Question 14

Internal Intercostal Muscles

Answer 14

O: Ribs 1-11 costal cartilage
I: Immediately below the origin
A: Pull ribs together, contract rib cage, breathe out

Question 15

Serratus anterior

Answer 15

A: Pulls the scapula towards the ribs

Question 16

Rectus abdominis

Answer 16

A: flexes torso/abdomen,
contracts abdominal cavity (for) - defecation, childbirth, breathing out

Question 17

Transverse abdominis

Answer 17

A: Contracts the abdominal cavity for rotation

Question 18

External oblique

Answer 18

Up from midline towards back of ribs
A: Flexion, rotation, lateral flex

Question 19

Internal obliques

Answer 19

down from midline towards iliac crest
A: Flexion, rotation, lateral flex, structural support

Question 19

Trapezius

Answer 19

O: Processes of vertebrae
I: Scapula and occipital
A: Pulls the scapula down + in
* Extends the neck
* Antagonist to sternocleido mastoid

Question 20

Latissimus Dorsi

Answer 20

I: Anterior of the humerus
A: Adduction of the arm at shoulder - like pec maj
* Extends arm (pulls back) - antagonist

Pulling down

Question 21

Teres Major

Answer 21

• Below infraspinatus
• Weak adductor of arm
• Rotates the arm towards the body

Question 22

Infraspinatus

Answer 22

Rotates arm away from the body
Over the scapula
Stabilizes scapula

Question 23

Serratus posterior inferior

Answer 23

A: Pulls rib cage in
Contract thoracic cavity
For breathing out

under the neck and upper traps

Question 24

Rhomboid

Answer 24

Pulls back + stabilizes scapula

Question 25

Erector Spinae

Answer 25

O: Lumbar & thoracic region I: Processes of vertebrae A: Extends torso & Standing up straight

Question 26

Deltoid

Answer 26

A: Abducts the arm

Question 27

Biceps Brachii

Answer 27

I: Radius A: Flexes + supinates lower arm at the elbow, Lifts the radius

Question 28

Brachialis

Answer 28

I: Ulna A: Lifts the ulna

Question 29

Triceps Brachii

Answer 29

I: Ulna A: Extends the arm at the elbow Antagonist to biceps brachii, brachialis, brachioradialis

Question 30

Brachioradialis

Answer 30

O: Distal humerus I: Distal radius A: Rotation + supination

Question 31

Flexor capri radialis

Answer 31

Just medial to brachioradialis Tendon touches hand under the thumb A: Flexes + adducts the hand

Question 32

Palmaris longus

Answer 32

In the middle of the forearm A: Flexor of the hand (weak)

Question 33

Flexor capri ulnaris

Answer 33

Along the ulna side of the arm A: Flexes the hand at the wrist & Adducts hand

Question 34

Extensor radialis longus

Answer 34

Back side of the arm Radial side Right next to brachioradialis A: Extends the hand at the wrist & Abducts the hand

Question 35

Extensor digitorum

Answer 35

back side of arm / digits + fingers I: Phalanges A: Extend digits

Question 36

Extensor carpi ulnaris

Answer 36

back side of arm / wrist + ulna A: Extends the hand at the wrist & Adducts hand

Question 37

Gluteus Maximus

Answer 37

I: Femur A: hip abduction and leg rotation & Postural - for standing Lots of slow twitch

Question 38

Adductor longus

Answer 38

Wider muscle under the gracilis A: Adduct the legs

Question 39

Gracilis

Answer 39

A: Adduct the legs Inserts into the tibia to adduct the whole legs

Question 40

Semitendinosus

Answer 40

middle narrow hamstring muscle A: knee flexion

Question 41

Biceps femoris

Answer 41

Lateral hamstring muscle A: knee flexion

Question 42

Semimembranosus

Answer 42

wider + medial, deep to the semitendinosus A: knee flexion

Question 43

Sartorius

Answer 43

A: leg crossing

Question 44

Rectus femoris

Answer 44

Big middle quad I: Tibia A: Leg extension & knee flexion

Question 45

Vastus medialis

Answer 45

Medial to rectus femoris I: Tibia A: Leg extension & knee flexion

Question 46

Vastus lateralis

Answer 46

Lateral to rectus femorus I: Tibia A: Leg extension & knee flexion

Question 47

Vastus intermedius

Answer 47

Deep, not on the models I: Tibia A: Leg extension & knee flexion

Question 48

Tensor fascia latae

Answer 48

Muscle in the middle of the IT band A: Abduction, flexion, + medial rotation

Question 49

Iliotibial band

Answer 49

A: Attaching the tensor fascia latae and glutes to the tibia

Question 50

Tibialis Anterior

Answer 50

shin muscle A: Dorsiflex’s the foot

Question 51

Gastrocnemius

Answer 51

I: Calcaneus A: More fast twitch muscles - running, walking, jumping (plantar flexion)

Question 52

Soleus

Answer 52

I: Calcaneus A: More slow twitch fibers - postural + standing (plantar flexion)