Lecture 11: Muscles

Question 1

What are the functions of facial muscles?

Answer 1

expressing emotion, speech, and mastication

Question 2

Orbicularis oculi function?

Answer 2

closes the eyelid

Question 3

Orbicularis oris function?

Answer 3

closes the lips and purses the lips

Question 4

Occipitofrontalis function?

Answer 4

Occipitofrontalis has 2 bellies: frontal and occipital belly.
Frontal belly: raises eyebrows and wrinkles forehead
Occipital belly: raises hair

Question 5

What connects the bellies of the occipitofrontalis?

Answer 5

epicranial aponeurosis

Question 6

What are the muscles that move the mandible?

Answer 6

Platysma, masseter, and temporalis

Question 7

Platysma function?

Answer 7

permits frowning and depresses the mandible

Question 8

Masseter and temporalis function?

Answer 8

elevate the mandible: close the jaw

Question 9

sternocleidomastoid origin and insert?

Answer 9

originates - manubrium
inserts - temporal bone

Question 10

Sternocleidomastoid function?

Answer 10

rotates the head, extend the head at the atlanto-occipital joint

Question 11

function of the abdominal muscles?

Answer 11

protect the abdominal viscera and move the vertebral column

Question 12

layers of abdominal muscles?

Answer 12

external oblique(superficial), internal oblique(intermediate), and transversus abdominis(deepest)

Question 13

rectus abdominis?

Answer 13

rectus abdominis runs parallel to the midline. it is divided by tendinous intersections. responsible for the definition of 6-8 pack

Question 14

what does the diaphragm do?

Answer 14

permits breathing

Question 15

muscles that move the pectoral girdle and their functions?

Answer 15

serratus anterior, trapezius
serratus anterior: abducts the scapula, assists in pushing and punching
trapezius muscle: permits rotation, adduction, depression, stabilization RADS of the scapula

Question 16

Muscles that move the upper limb?

Answer 16

pectoralis major, deltoids, and latissimus dorsi

Question 17

Function of the muscles that move the upper limb?

Answer 17

move the humerus

Question 18

pectoralis major function?

Answer 18

move the humerus, permit AMF of the arm: adduction, medial rotation, and flexion

Question 19

deltoid function?

Answer 19

move the humerus, permit AMF of the arm: ABduction, medial/lateral rotation, and flexion/extension

Question 20

Latissimus dorsi function?

Answer 20

• swimmers muscle
• EAM: extension, adduction, medial rotation

Question 21

muscles that move the forearm?

Answer 21

biceps brachii, triceps brachii, brachioradialis,

Question 22

biceps brachii function?

Answer 22

FS: flexion of the arm at elbow joint and supination of hand

Question 23

triceps brachii function?

Answer 23

extension of the arm at elbow joint

Question 24

brachioradialis function?

Answer 24

• flexes the arm at the elbow joint
• controls speed of movement
• supinates and pronates the hand
  FSP

Question 25

muscles that move the lower limbs?

Answer 25

gluteus maximus, gluteus medius, semitendinosus, biceps femoris, semimembranosus, rectus femoris, vastus intermedius, vastus lateralis, vastus medialis

Question 26

function of the muscles that move the lower limb?

Answer 26

the gluteal muscles function to move the femur

Question 27

gluteus maximus function?

Answer 27

• largest muscle of the body
• extension of the leg at the hip joint
• lateral rotation of the femur at the hip joint
  EL

Question 28

gluteus medius function?

Answer 28

• it is deep to the gluteus maximus
• AM: abduction and medial rotation of the femur

Question 29

what muscles are included in the “hamstrings” and functions?

Answer 29

semitendinosus, biceps femoris, and semimembranosus
- flexion of the the distal lower limb at the knee joint
- extend the leg at the hip joint

Question 30

quads muscles and functions?

Answer 30

• rectus femoris, vastus intermedius, vastus lateralis, vastus medialis
• extension of the distal lower limb at the knee joint
• flexion of the leg at the hip joint

Question 31

gracilis

Answer 31

• AMF
• adduction of the thigh at the hip
• medial rotation of the thigh
• flexion of the leg around the knee joint

Question 32

muscles that move the foot?

Question 33

soleus function?

Answer 33

permits plantar flexion of the foot at the ankle joint

Question 34

gastrocnemius function?

Answer 34

PF
plantar flexion of the foot at the ankle joint
flexion of the lower limb at the knee joint

Question 35

tibialis anterior function

Answer 35

dorsiflexion of the foot at the ankle joint
supination of the foot at intertarsal joints