Chapt 11 Part 3

Question 1

Iliopsoas psoas major

Answer 1

O=transverse processes and bodies of lumbar vertebrae
I=with iliacus into lesser trochanter of femur
A=psoas major and iliacus muscles together flex thigh at hip joint, rotate thigh laterally and flex trunk on hip as in sitting up from supine position

Question 2

Gluteal Maximus

Answer 2

O=iliac crest, sacrum, coccyx and aponeurosis of sacrospinalis
I=iliotibial tract of fascia lata and superior part of linea aspera under greater trochanter of femur
A=extends thigh at hip joint and laterally rotates thigh and helps lock knees in extension
Rma= extends torso

Question 3

Gluteus medius

Answer 3

Abducts thigh at hip joint and medially rotates the thigh

Question 4

Adductor longus

Answer 4

Adducts and flexes thigh at hip joint and rotates thighs
Rma=extends thigh

Question 5

Adductor Magnus

Answer 5

Adducts thigh at hip joint and rotates thigh
Anterior-flexes thigh at hip
Posterior-extends thigh at hip

Question 6

Quadriceps femoris

Answer 6

O=
Rectus femoris-anterior inferior iliac spine
Vastus lateralis-greater trochanter and linea aspera of femur
Vastus medialis- linea aspera of femur
Vastus intermedius-anterior and lateral surfaces of body of femur
I=patella via quadriceps tendon and then tibial tuberosity vi petellar ligament
A=extend leg at knee joint, Rectus femoris by itself flexes thigh at hip joint

Question 7

Sartorius

Answer 7

Weakly flexes leg at knee joint
Weakly flexes, abducts and laterally rotates thigh at hip joint

Question 8

Muscles that make up hamstring

Answer 8

Biceps femoris
Semitendinosus
Semimembranosus

Question 9

Biceps femoris

Answer 9

O=long head from ischial tuberosity
Short head from linea aspera of femur
I= head of fibula and lateral condyle of tibia
A=flexes leg at knee joint and extends thigh at hip joint

Question 10

Semitendinosus

Answer 10

Flexes leg at knee joint and extends thigh at hip joint

Question 11

Semimembranosus

Answer 11

Flexes leg at knee joint and extends thigh at hip joint

Question 12

Tibialis anterior

Answer 12

O=lateral condyle and body of tibia and interosseous membrane
I=metatarsal I and 1st cuneiform
A=dorsiflexes foot at ankle joint and supinates foot at intertarsal joints

Question 13

Extensor digitorium longus

Answer 13

O=lateral condyles of tibula, anterior surface of fibula interosseous membrane
I=middle and distal phalanges of toes ii-v
A=dorsiflexes foot at ankle joint and extends distal and middle phalanges of each toe at interphalangeal joints and proximal phalanx of each toe at metatarsophalangeal joint

Question 14

Fibularis longus

Answer 14

Plantar flexes foot at ankle and pronates foot at intertarsal joints

Question 15

Gastrocnemius

Answer 15

O=lateral and medial condyles of femur and capsule of knee
I=calcaneus by way of calcaneal tendon
O=plantar flexes foot at ankle joint and flexes leg at knee joint

Question 16

Soleus

Answer 16

Plantar flexes foot at ankle joint

Question 17

Flexor digitorium longus

Answer 17

O=middle 3rd of posterior surface of tibia
I=distal phalanges of toe ii-v
A=plantar flexes foot at ankle joint, flexes distal and middle phalanges of toes ii-v at interphalangeal joint and proximal phalanx of toes ii-v at metatarsophalangeal joint