sacral plexus

Question 1

Superior Gluteal N. Origin

Answer 1

L4-L5, S1

Question 2

Inferior Gluteal N. Origin

Answer 2

L5-S2

Question 3

Sciatic N. Origin

Answer 3

L4-S3

Question 4

Tibial N. Innervates

Answer 4

Gastrocnemius, plantaris, soleus, popliteus,
tibialis posterior, FDL, FHL

Question 5

Superficial peroneal N. Innervates:

Answer 5

Peroneus longus and brevis

Question 6

Deep peroneal N. Innervates:

Answer 6

Tibialis anterior, EHL, EDL, Peroneus tertius

Question 7

Superior gluteal N. Innervates:

Answer 7

Gluteus minimus, medius, and TFL

Question 8

Inferior Gluteal N. Innervates:

Answer 8

Gluteus maximus

Question 9

Nerve to quadratus femoris innervates:

Answer 9

Quadratus femoris and gemellus inferior

Question 10

Nerve to obturator internus innervates

Answer 10

Obturator internus and gemellus superior

Question 11

Sciatic N. Innervates:

Answer 11

Biceps femoris, semitendinosus,
semimembranosus, and posterior portion of
adductor magnus

Question 12

Nerve to the Piriformis Innervates

Answer 12

Piriformis

Question 13

Sacral plexus is Created by spinal N:

Answer 13

 Created by spinal nerves L4, L5,
S1-S4

Question 14

sacral plexus is Housed

Answer 14

anterior to sacrum

Question 15

Primary Branches of the sacral plexus:

Answer 15

 Superior gluteal
 Inferior gluteal
 Sciatic and its branches

Question 16

Secondary Branches of the sacral plexus

Answer 16

 Nerve to piriformis
 Nerve to gemellus superior
 Nerve to quadratus femoris

Question 17

 Enters gluteal region through
Greater Sciatic Foramen (GSF)
superior to piriformis

Answer 17

Superior Gluteal Nerve

Question 18

 Innervates: glut med/min; TFL

Answer 18

Superior Gluteal Nerve

Question 19

 Enters gluteal region through GSF
inferior to piriformis

Answer 19

Inferior Gluteal Nerve

Question 20

 Innervates: glute max

Answer 20

Inferior Gluteal Nerve

Question 21

 Largest peripheral nerve

Answer 21

Sciatic Nerve

Question 22

Enters gluteal region through GSF
deep to piriformis

Answer 22

Sciatic Nerve

Question 23

Prox. To popliteal fossa, splits into
tibial nerve and common peroneal
nerve

Answer 23

Sciatic Nerve

Question 24

 Innervates: hamstrings; posterior
fibres of adductor magnus

Answer 24

Sciatic Nerve

Question 25

 Travels through popliteal fossa as lateral neurovascular structure

Answer 25

Tibial Nerve

Question 26

 Travels down posterior leg  Goes posterior to medial malleolus (Tom, Dick, AN’ Harry)  Into plantar aspect of foot

Answer 26

Tibial Nerve

Question 27

 Innervates: popliteus, gastroc, soleus, FDL, FHL, tib. post, plantaris

Answer 27

Tibial Nerve

Question 28

 Follows tendon of biceps femoris  At fibular head, splits into: deep and superficial peroneal nerves

Answer 28

Common Peroneal Nerve

Question 29

 Innervates: non-contractile structures of the knee

Answer 29

Common Peroneal Nerve

Question 30

 Branches off common peroneal nerve  Travels down lateral compartment  Into dorsum of foot

Answer 30

Superficial Peroneal Nerve

Question 31

 Innervates: peroneus longus and brevis

Answer 31

Superficial Peroneal Nerve

Question 32

 Branches off common peroneal nerve  Travels down anterior compartment  Into dorsum of foot

Answer 32

Deep Peroneal Nerve

Question 33

 Innervates: tib ant, EDL, EHL, peroneus tertius

Answer 33

Deep Peroneal Nerve

Question 34

 All travel through GSF deep to piriformis

Answer 34

Secondary Nerves

Question 35

Greater Sciatic Foramen Created by:

Answer 35

Created by: greater sciatic notch, lateral sacrum, sacrospinous ligament

Question 36

Structures within Greater Sciatic Foramen:

Answer 36

piriformis, superior gluteal N, A, V, inferior gluteal N, A, V, sciatic nerve, 3 secondary nerves of sacral plexus

Question 37

Popliteal fossa Created by:

Answer 37

Created by: biceps femoris, semis, medial and lateral gastroc heads

Question 38

Popliteal fossa Structures within:

Answer 38

Structures within: popliteal artery, popliteal vein, tibial nerve (from medial to lateral)

Question 39

Tom, Dick AN’ Harry

Answer 39

 Located posterior to medial malleolus

Question 40

 T = Tibialis post.  D = flexor Digitorum longus  A = posterior tibial Artery  N = tibial Nerve  H = flexor Hallucis longus

Answer 40

Tom, Dick AN’ Harry