Muscles unit III

Question 1

Iliacus attachments

Answer 1

O: iliac fossa, sacrum
I: lesser trochanter of femur

Question 2

Poas major attachments

Answer 2

O: Bodies and transverse processes of lumbar vertebrae
I: lesser trochanter

Question 3

Actions of the iliopsoas

Answer 3

Flexion at hip, flexion of spinal column, maintain posture.

Question 4

Innervation of the iliopsoas

Answer 4

Femoral nerve (L2-4)

Question 5

What percentage of the population has a Psoas minor muscle?

Answer 5

About 50%

Question 6

Attachments of the Psoas minor

Answer 6

O: bodies of lumbar vertebrae
I: iliopubic eminence

Question 7

Action of the Psoas minor

Answer 7

Flex pubic bone

Question 8

Innervation of the Psoas minor

Answer 8

L1

Question 9

Attachments of the sartorius

Answer 9

O: asis
I: superior medial shaft of tibia

Question 10

Actions of the sartorius

Answer 10

Flex hip and knee at the same time, abduct and laterally rotate femur, medially rotate leg

Question 11

Innervation of the sartorius

Answer 11

Femoral nerve

Question 12

Quadriceps muscles

Answer 12

Rectus femoris, vastus medialis, vastus lateralis, vastus intermedius

Question 13

Insertion of the quadriceps muscles

Answer 13

Base of the patella

Question 14

Origin of the rectus femoris

Answer 14

AIIS, acetabulum

Question 15

Origin of vastus lateralis

Answer 15

Greater trochanter and linea aspera

Question 16

Origin of the vastus medialis

Answer 16

Linea aspera

Question 17

Origin of vastus intermedius

Answer 17

Anterior-lateral aspect of femur and linea aspera

Question 18

Fibers sometimes separate from vastus intermedius to form what muscle? Where does that muscle insert?

Answer 18

Articularis genu, synovial membrane of the knee joint

Question 19

Action of the articularis genu

Answer 19

Retract synovial membrane to stabilize knee joint

Question 20

Action of all quadriceps muscles

Answer 20

Extend knee joint, strengthen knee joint

Question 21

Action of rectus femoris only

Answer 21

Flex femur at hip joint

Question 22

What is a cramp or spasm of the quadriceps called?

Answer 22

Charley Horse

Question 23

What is an overuse injury of the quadriceps tendon of insertion and/or the patellar ligament called?

Answer 23

Jumper’s knee

Question 24

Which spinal nerves are tested during a patellar reflex test?

Answer 24

L2-L4

Question 25

Which muscles are part of the adductor group?

Answer 25

Gracilis, pectineus, adductor longus, adductor brevis, and adductor magnus

Question 26

The adductor group muscles are innervated by which nerve?

Answer 26

The obturator nerve

Question 27

Attachments of gracilis

Answer 27

O: Ramus of ischium, inferior ramus of pubis I: superior medial shaft of tibia.

Question 28

Actions of gracilis

Answer 28

Flex leg, adduct femur

Question 29

What surgical procedure is the gracilis involved in?

Answer 29

It is often transplanted to replace a damaged muscle

Question 30

Attachments of pectineus

Answer 30

O: superior ramus I: pectineal line

Question 31

Actions of the pectineus

Answer 31

Adduct femur, flex hip

Question 32

Innervation of pectineus

Answer 32

Femoral and obturator nerves

Question 33

Attachments of adductor magnus

Answer 33

O: rami of pubis and ischium I: linea aspera, adductor tubercle

Question 34

Actions of adductor magnus

Answer 34

Adduct femur, extend femur at hip

Question 35

Innervation of adductor magnus

Answer 35

Obturator and sciatic nerve

Question 36

Attachments of adductor longus

Answer 36

O: Superior ramus of pubis I: linea aspera

Question 37

Attachments of adductor brevis

Answer 37

O: inferior ramus of pubis I: pectineal line, linea aspera

Question 38

Attachments of tensor fascia lata

Answer 38

O: crest of ilium I: iliotibial tract

Question 39

Actions of the tensor fascia lata

Answer 39

Flex, abduct, medially rotate femur, stabilize knee

Question 40

Innervation of the tensor fascia lata

Answer 40

Superior gluteal nerve

Question 41

Attachments of Gluteus maximus

Answer 41

I: posterior gluteal line, sacrum and coccyx, posterior ligaments of SI joint O: gluteal tuberosity, iliotibial tract

Question 42

Actions of Gluteus maximus

Answer 42

Extend and laterally rotate femur, stabilize knee and pelvic bone

Question 43

Innervation of Gluteus maximus

Answer 43

Inferior gluteal nerve