Lower Limb (mm OIAI, joints, lig)

Question 1

Psoas major
Origin: 
Insertion: 
Action: 
Innervation:

Answer 1

Origin: bodies and transverse processes of lumbar vertebrae
Insertion: Lesser trochanter (inserts as iliopsoas)
Action: flex thigh
Innervation: Femoral n.

Question 2

Iliacus
Origin: 
Insertion: 
Action: 
Innervation:

Answer 2

Origin: Iliac fossa
Insertion: Lesser trochanter (inserts as iliopsoas
Action: flex thigh
Innervation: Femoral n.

Question 3

Rectus femoris
Origin: 
Insertion: 
Action: 
Innervation:

Answer 3

Origin: Anterior inferior iliac spine
Insertion: Tibial tuberosity
Action: Extend leg, flex thigh
Innervation: Femoral n.

Question 4

Vastus lateralis
Origin: 
Insertion: 
Action: 
Innervation:

Answer 4

Origin: Linea aspera & greater trochanter
Insertion: Tibial tuberosity
Action: Extend leg
Innervation: Femoral n.

Question 5

Vastus medialis
Origin: 
Insertion: 
Action: 
Innervation:

Answer 5

Origin: Linea aspera
Insertion: Tibial tuberosity
Action: Extend leg
Innervation: Femoral n.

Question 6

Vastus intermedius
Origin: 
Insertion: 
Action: 
Innervation:

Answer 6

Origin: Anterior and lateral shaft of femur
Insertion: Tibial tuberosity
Action: Extend leg
Innervation: Femoral n.

Question 7

Sartorius
Origin: 
Insertion: 
Action: 
Innervation:

Answer 7

Origin: Anterior superior iliac spine
Insertion: Medial, proxmial tibia
Action: Flex leg, flex thigh, laterally rotate thigh
Innervation: Femoral n.

Question 8

Gluteus maximus
Origin: 
Insertion: 
Action: 
Innervation:

Answer 8

Origin: Posterior ilium and sacrum & sacrotuberous ligament
Insertion: Gluteal tuberosity of femur, iliotibial tract
Action: Extends thigh, abducts thigh, & laterally rotates thigh
Innervation: Inferior gluteal n.

Question 9

Tensor Fasciae Latae 
Origin: 
Insertion: 
Action: 
Innervation:

Answer 9

Origin: Iliac crest, anterior superior iliac spine
Insertion: Iliotibial tract
Action: Abducts thigh, medially rotates thigh, & flexes thigh
Innervation: Superior gluteal n.

Question 10

Gluteus medius
Origin: 
Insertion: 
Action: 
Innervation:

Answer 10

Origin: Lateral ilium
Insertion: Greater trochanter
Action: Abducts thigh & medially rotates thigh
Innervation: Superior gluteal n.

Question 11

Gluteus minimus
Origin: 
Insertion: 
Action: 
Innervation:

Answer 11

Origin: Lateral ilium (inferior to medius)
Insertion: Greater trochanter
Action: Abducts thigh & medially rotates thigh
Innervation: Superior gluteal n.

Question 12

Piriformis
Origin: 
Insertion: 
Action: 
Innervation:

Answer 12

Origin: Anterior surface of sacrum
Insertion: Greater trochanter
Action: Laterally rotate thigh
Innervation: S1-2 ventral rami

Question 13

Semitendinosus
Origin: 
Insertion: 
Action: 
Innervation:

Answer 13

Origin: Ischial tuberosity
Insertion: Medial surface of proximal tibia
Action: Extend thigh & flex leg
Innervation: Tibial divison of sciatic n.

Question 14

Semimambranosus
Origin: 
Insertion: 
Action: 
Innervation:

Answer 14

Origin: Ischial tuberosity
Insertion: Posterior surface of medial condyle of tibia
Action: Extend thigh & flex leg
Innervation: Tibial divison of sciatic n.

Question 15

Biceps femoris - long head
Origin: 
Insertion: 
Action: 
Innervation:

Answer 15

Origin: Ischial tuberosity
Insertion: Head of fibula
Action: Extend thigh & flex leg
Innervation: Tibial division of sciatic n.

Question 16

Biceps femoris - short head
Origin: 
Insertion: 
Action: 
Innervation:

Answer 16

Origin: Linea aspera
Insertion: Head of fibula
Action: Flex leg
Innervation: Common fibular division of sciatic n.

Question 17

Pectineus
Origin: 
Insertion: 
Action: 
Innervation:

Answer 17

Origin: Superior pubic ramus
Insertion: Posterior femur just distal to lesser trochanter
Action: Adduct and flex thigh
Innervation: Obturator n.

Question 18

Adductor longus
Origin: 
Insertion: 
Action: 
Innervation:

Answer 18

Origin: Body of pubis
Insertion: Linea aspera (distal to adductor brevis)
Action: Adduct and flex thigh
Innervation: Obturator n.

Question 19

Adductor brevis
Origin: 
Insertion: 
Action: 
Innervation:

Answer 19

Origin: Body of pubis
Insertion: Linea aspera (proximal to adductor longus)
Action: Adduct and flex thigh
Innervation: Obturator n.

Question 20

Gracilis
Origin: 
Insertion: 
Action: 
Innervation:

Answer 20

Origin: Body of pubis
Insertion: Medial surface of proximal tibia
Action: Adduct thigh, flex thigh, flex leg
Innervation: Obturator n.

Question 21

Adductor magnus
Origin: 
Insertion: 
Action: 
Innervation (2):

Answer 21

Origin: Anterior pubic ramus
Insertion: Linea aspera, adductor tubercle
Action: Adduct thigh and extend thigh
Innervation: Obturator n. (adductor part), Tibial n. (hamstring part)

Question 22

Gastrocnemius
Origin: 
Insertion, via: 
Action: 
Innervation:

Answer 22

Origin: Posterior surface of medial and lateral epicondyles of femur
Insertion: Posterior calcaneus, via: Achilles tendon
Action: Plantar flex foot & flex leg
Innervation: Tibial n.

Question 23

Plantaris
Origin: 
Insertion, via: 
Action: 
Innervation:

Answer 23

Origin: Posterior surface of femur proximal to lateral epicondyle
Insertion: Posterior calcaneus, via: Achilles tendon
Action: Plantar flex foot & flex leg
Innervation: Tibial n.

Question 24

Soleus
Origin: 
Insertion, via: 
Action: 
Innervation:

Answer 24

Origin: Posterior surface of proximal tibia and fibula
Insertion: Posterior calcaneus, via: Achilles tendon
Action: Plantar flex foot
Innervation: Tibial n.

Question 25

``` Flexor hallucis longus Origin: Insertion: Action: Innervation: ```

Answer 25

Origin: Posterior surface of distal 2/3 fibula Insertion: Distal phalanx of hallux Action: Flex hallux, inverts foot & Plantar flex foot Innervation: Tibial n.

Question 26

``` Flexor digitorum longus Origin: Insertion: Action: Innervation: ```

Answer 26

Origin: Posterior surface of middle tibia Insertion: Distal phalanges of digits 2-5 Action: Flex digits 2-5, inverts foot & Plantar flexes foot Innervation: Tibial n.

Question 27

``` Tibialis posterior Origin: Insertion: Action: Innervation: ```

Answer 27

Origin: Posterior surface of proximal tibia, fibula & interosseus membrane Insertion: Navicular cuneiforms & metatarsals 2-4 Action: Inverts foot & Plantar flexes foot Innervation: Tibial n.

Question 28

``` Fibularis longus Origin: Insertion: Action: Innervation: ```

Answer 28

Origin: Lateral surface of proximal fibula & head of fibula Insertion: Metatarsal 1 & medial cuneiform Action: Everts foot & Plantar flexes foot Innervation: Superficial fibular n. (branch of common fibular n.)

Question 29

``` Fibularis brevis Origin: Insertion: Action: Innervation, (branch of): ```

Answer 29

Origin: Lateral surface of distal fibula Insertion: Dorsal surface of metatarsal 5 Action: Everts foot & Plantar flexes foot Innervation: Superficial fibular n. (branch of common fibular n.)

Question 30

``` Tibialis anterior Origin: Insertion: Action: Innervation, (branch of): ```

Answer 30

Origin: Lateral surface of proximal tibia Insertion: Metatarsal 1 & medial cuneiform Action: Inverts foot & dorsiflexes foot Innervation: Deep fibular n. (branch of common fibular n.)

Question 31

``` Extensor hallucis longus Origin: Insertion: Action: Innervation, (branch of): ```

Answer 31

Origin: Anterior surface of middle fibula & interosseous membrane Insertion: Distal phalanx of digit 1 Action: Extends digit 1 & dorsiflexes foot Innervation: Deep fibular n. (branch of common fibular n.)

Question 32

``` Extensor digitorum longus Origin: Insertion: Action: Innervation, (branch of): ```

Answer 32

Origin: Anterior surface of proximal fibula & interosseous membrane Insertion: Distal phalanges of toes 2-5 Action: Extend digits 2-5 & dorsiflexes foot Innervation: Deep fibular n. (branch of common fibular n.)

Question 33

``` Fibularis tertius Origin: Insertion: Action: Innervation, (branch of): ```

Answer 33

Origin: Anterior surface of distal fibula Insertion: Dorsal surface of metatarsal 5 Action: Everts foot and dorsiflexes foot Innervation: Deep fibular n. (branch of common fibular n.)