Muscle

Question 1

What are the three muscles located in the posterior thigh?

Answer 1

Semitendinosus, Biceps Femoris, Semimembranosus

Question 2

How many muscles are found in the foot?

Answer 2

12 muscles

Question 3

What is the origin of the Semitendinosus muscle?

Answer 3

Ischial tuberosity

Question 4

What is the insertion point of the Biceps Femoris long head?

Answer 4

Lateral surface of head of fibula

Question 5

What nerve innervates the Semitendinosus?

Answer 5

Sciatic nerve (tibial division)

Question 6

What action does the Biceps Femoris perform?

Answer 6

Flexes and laterally rotates leg, extends the thigh

Question 7

True or False: The short head of the Biceps Femoris is part of the hamstrings.

Answer 7

False

Question 8

What is the function of the Plantaris muscle?

Answer 8

Weakly assist gastrocnemius

Question 9

What is the innervation of the Popliteus muscle?

Answer 9

Tibial nerve (L4-L5, S1)

Question 10

Fill in the blank: The Tibialis Anterior muscle _______ the foot and inverts the foot.

Answer 10

Dorsiflexes

Question 11

What are the origins of the Extensor Digitorum Longus?

Answer 11

Lateral condyle of tibia, proximal three-fourths of anterior surfaces of interosseous membrane of fibula

Question 12

Which nerve innervates the Fibularis Longus?

Answer 12

Superficial fibular nerve (L5, S1, S2)

Question 13

What action does the Gastrocnemius perform?

Answer 13

Plantarflexes foot, assists in flexion of knee, raises heel in walking

Question 14

What is the origin of the Soleus muscle?

Answer 14

Posterior surface of head of fibula, proximal one-fourth of posterior surface of fibula, soleal line of tibia

Question 15

What is the action of the Flexor Hallucis Longus?

Answer 15

Flexes all joints of great toe, plantar flexes foot (weakly)

Question 16

What is the innervation for the Flexor Digitorum Longus?

Answer 16

Tibial nerve (S2-S3)

Question 17

What is the action of the Tibialis Posterior?

Answer 17

Plantar flexes foot and inverts foot, arch support longitudinal arch

Question 18

What is the origin of the Abductor Hallucis?

Answer 18

Medial tubercle of tuberosity of calcaneus, flexor retinaculum, plantar aponeurosis

Question 19

Which nerve innervates the Lumbricals?

Answer 19

Medial one: medial plantar nerve; Lateral 3: lateral plantar nerve

Question 20

What is the action of the Flexor Digiti Minimi?

Answer 20

Flexes proximal phalanx of 5th digit

Question 21

Which muscle is responsible for tensing the skin of the neck?

Answer 21

Platysma

Question 22

What is the action of the Omohyoid muscle?

Answer 22

Steadies and depresses hyoid bone

Question 23

Fill in the blank: The Sternocleidomastoid muscle _______ flexes the head bilaterally.

Answer 23

Bilaterally

Question 24

What is the origin of the Digastric muscle?

Answer 24

Anterior belly: digastric fossa of mandible; Posterior belly: mastoid notch of temporal bone

Question 25

What action does the Stylohyoid muscle perform?

Answer 25

Elevates and retracts hyoid bone

Question 26

What is the innervation of the Tensor Fasciae Latae?

Answer 26

Superior gluteal nerve

Question 27

True or False: The Gluteus Maximus assists in medial rotation of the hip.

Answer 27

False

Question 28

What are the origins of the Gluteus Medius?

Answer 28

Os coxa (ilium)

Question 29

What is the insertion of the Piriformis muscle?

Answer 29

Greater trochanter

Question 30

What is the action of the Obturator Internus?

Answer 30

Laterally rotates hip joint, stabilize hip

Question 31

What is the function of the superior gluteal nerve?

Answer 31

Abduction and medial rotation of hip

Question 32

Which muscle is described as pear-shaped?

Answer 32

Piriformis

Question 33

What anatomical structures are associated with the piriformis?

Answer 33

Sacrum, sacrotuberous ligament

Question 34

Where is the greater trochanter located?

Answer 34

On the femur

Question 35

What are the anterior rami associated with the piriformis?

Answer 35

S1, S2

Question 36

What is the primary action of the obturator internus?

Answer 36

Laterally rotate hip joint, stabilize hip

Question 37

What is the function of the obturator internus when the hip is extended?

Answer 37

Lateral rotation

Question 38

What is the function of the obturator internus when the hip is flexed?

Answer 38

Abduction

Question 39

What structures form the obturator foramen?

Answer 39

Obturator membrane and obturator internus

Question 40

What is the location of the trochanteric fossa?

Answer 40

On the femur

Question 41

What nerve innervates the obturator internus?

Answer 41

Nerve to obturator internus

Question 42

What are the functions of the superior and inferior gemelli?

Answer 42

Laterally rotate hip joint, stabilize hip

Question 43

Where does the superior gemellus originate?

Answer 43

Ischial spine

Question 44

Where does the inferior gemellus originate?

Answer 44

Ischial tuberosity

Question 45

What is the insertion point for the superior gemellus?

Answer 45

Greater trochanter

Question 46

Which nerve innervates the superior gemellus?

Answer 46

Nerve to obturator internus

Question 47

Which nerve innervates the inferior gemellus?

Answer 47

Nerve to quadratus femoris

Question 48

What is the shape of the quadratus femoris?

Answer 48

Short and square shaped

Question 49

Where does the quadratus femoris originate?

Answer 49

Ischial tuberosity

Question 50

What is the insertion point of the quadratus femoris?

Answer 50

Quadrate tubercle on femur

Question 51

What nerve innervates the quadratus femoris?

Answer 51

Nerve to quadratus femoris

Question 52

What is the primary action of the quadratus femoris?

Answer 52

Laterally rotate hip joint