Lower Limb Anatomy

Question 1

Roots of lumbar Plexus

Answer 1

T12 and L1 to L4

Question 2

Branches of lumbar plexus

Answer 2

Iliohypogastric
lioinguinal
Genitofemoral
Lateral Cutaneous Femoral Nerve
Obturator
Femoral

Question 3

Sensation of liohyogastric nerve

Answer 3

Gluteal region above pubis

Question 4

Sensation of ilioinguinal nerve

Answer 4

Penis/Scrotum/Mons/Labium Majius

Question 5

Muscles of genito-femoral nerve (Genital branch)

Answer 5

Cremaster + Dartos

Question 6

Sensation of genito-femoral nerve (Femoral branch)

Answer 6

Anterior, upper thigh

Question 7

Sensation of lateral femoral cutaneous nerve

Answer 7

Lateral thigh

Question 8

Muscles of obturator nerve

Answer 8

External obturator
Adductor Longus
Adductor Brevis
Adductor Magnus
Gracilis
Pectineus

Question 9

Sensory supply of obturator nerve

Answer 9

Medial thigh

Question 10

Supply of femoral nerve (Ant. Branch)

Answer 10

Anterior thigh sensation

Question 11

Supply of femoral nerve (Post. branch)

Answer 11

Quadriceps Femoris

Question 12

Roots of Sacral Plexus

Answer 12

S 1 - 3

Question 13

Branches of Sacral Plexus

Answer 13

Superior Gluteal
Inferior Gluteal
Posterior Femoral Cutaneous
Piriformis
Obturator Internus
Quadratus Femoris
Sciatic

Question 14

Supply of superior gluteal nerve

Answer 14

Gluteus medius and minimus

Question 15

Supply of inferior gluteal nerve

Answer 15

Gluteus Maximus

Question 16

Supply of posterior femoral cutaneous nerve

Answer 16

Sensation posterior thigh

Question 17

Sciatic nerve’s route out of pelvis

Answer 17

Below piriformis, through greater sciatic foramen

Question 18

Supply of sciatic nerve in thigh

Answer 18

Biceps femoris, semitendinosus, semi-membrinosus

Question 19

Divisions of sciatic nerve

Answer 19

Common fibular, Tibial

Question 20

Supply of tibial nerve

Answer 20

Gastonemicus, Popliteus, Soleus, Plantaris, Tibialis Posterior, Flexor digitorum longus, flexor hallicus longus

Question 21

Supply of medial plantar nerve

Answer 21

Medial 3.5 toes

Question 22

Supply of lateral plantar nerve

Answer 22

Lateral 1.5 toes

Question 23

Supply of Sural nerve

Answer 23

Sensation posterior-lateral leg

Formed from branches of tibial and common fibular nerve

Question 24

Location of common fibular nerve division

Answer 24

Beneath peroneus longus

Question 25

Supply superficial fibular nerve

Answer 25

Peroneus longus / brevis Anterolateral leg Dorsum of foot (Not first web space!)

Question 26

Supply deep fibular nerve

Answer 26

``` Tibialis anterior Extnsor digitorum longus Peroneus tertius Extensor hallicus longus Extensor hallicus brevis Extensor digitorum brevis First web space ```

Question 27

Lower Limb anterior muscular compartment

Answer 27

Tibialis anteriror Extensor digitorum longus Peroneus tertius Extensor hallicus longus

Question 28

Lower limb perennial muscular compartment

Answer 28

Peroneus longus | Peroneus brevis

Question 29

Superficial Posterior compartment

Answer 29

Gastronemicus, Soleus

Question 30

Deep posterior compartment

Answer 30

Flexor digitorum longus Flexor hallicus longus Tibialis posterior

Question 31

Exterior marking of division of iliac arteries

Answer 31

L4

Question 32

Supply of internal iliac

Answer 32

Hypogastric artery

Question 33

Branches of external iliac artery

Answer 33

Inferior epigastric Deep circumflex iliac Femoral artery

Question 34

External marking of iliac artery (Groin)

Answer 34

Midway between ASIS and Symphysis pubis | Mid-inguinal point

Question 35

Branches of femoral artery

Answer 35

``` Deep external pudeneal (Scrotum) Profunda Femoris (Medial fascial compartment) Descending genicular arteries ```

Question 36

Location of end of popliteal artery

Answer 36

Lower border popliteal muscle

Question 37

Deepest structure within popliteal fossa

Answer 37

Popliteal artery

Question 38

Branches anterior tibial artery

Answer 38

Dorsalis pedis

Question 39

Psoas Muscle (Major / Minor)

Answer 39

``` Origin: T12 - L5 Transverse Processess Insertion: Lesser trochanter Innervation: Lumbar plexus Artery: Iliolumbar Action: Hip flexion ```

Question 40

Iliacus

Answer 40

``` Origin: Iliac fossa (upper 2/3) Insertion: Lesser trochanter Innervation: Femoral nerve Artery: Medial femoral circumflex Action: Hip flexion ```

Question 41

Gluteus Maximus

Answer 41

``` Origin: Sacrum Insertion: Gluteal Tuberosity Innervation: Inferior gluteal nerve Artery: Sup / Inf gluteal arteries Action: Ext rotation ```

Question 42

Gluteus Medius

Answer 42

``` Origin: Ilium Insertion: Greater trochanter Innervation: Sup. gluteal nerve Artery: Sup. gluteal artery Action: Hip abduction ```

Question 43

Gluteus Minimus

Answer 43

``` Origin: Ileum Insertion: Greater trochanter Innervation: Sup. gluteal nerve Artery: Sup. gluteal artery Action: Hip abduction ```

Question 44

Quadratus femoris

Answer 44

``` Origin: Iscial tuberosity Insertion: Intertrochanteric crest Innervation: Nerve to quad fem Artery: Inf gluteal artery Action: Lateral rotation / Adduction ```

Question 45

Obturator Internus

Answer 45

``` Origin: Ant. surface of sciopubic ramus Insertion: Medial greater trochanter Innervation: Nerve to ob. int. Artery: Inf gluteal artery Action: Hib abduction ```

Question 46

Obturator externus

Answer 46

``` Origin: Posterior surface of obturator foramen Insertion: Trochanteric fossa Innervation: Obturator nerve Artery: Obturator artery Action: Adduction ```

Question 47

Piriformis

Answer 47

``` Origin: Sacrum Insertion: Greater trochanter Innervation: Nerve to piriformis Artery: Inf. gluteal Action: External rotation ```