Sacral Plexus Quiz

Question 1

Sacral plexus is formed by what?

Answer 1

Anterior rami of L4-S3 part of 4

Question 2

L4 and L5 are by way of?

Answer 2

Lumbosacral trunk

Question 3

Sacral plexus is on surface of which muscle?

Answer 3

Piriformis

Question 4

Which roots make up the nerve to the quadratus femurs and gemellus inferior?

Answer 4

L4, L5 and S1

Question 5

Which roots make up the nerve to the obturator interns and gemellus superior?

Answer 5

L5, S1 and S2

Question 6

The pudendal nerve is made up from fibers of which roots?

Answer 6

S2, S3 and S4

Question 7

Which branches come off of the Pudendal nerve?

Answer 7

Inferior rectal nerves

Perineal nerve
Superficial
Deep

Dorsal nerve of penis (clit)

Question 8

Inferior rectal nerves carry sensory info from?

Motor supply to?

Answer 8

Skin around the anus and inferior 2/3 of anal canal

External anal sphincter

Question 9

The deep branches of the perineal nerve supply which 4 muscles?

Answer 9

External anal sphincter

Bulbosponsious

Ischicavernosus

Superficial transverse perineus

Question 10

The terminal branch of the pudendal nerve is what?

Supplies what?

Answer 10

Dorsal nerve of the penis or clitoris

Deep transverse perineum

Urethral sphincter muscles

Question 11

Individual muscular branches off the sacral plexus contain fibers from which root?

Supply which muscles?

Answer 11

S4

Levator Ani
Coccygeus

Question 12

Pelvic splanchnic nerves contain fibers from which roots?

Answer 12

S2, S3 and S4

Question 13

The nerve to the piriformis carries fibers from which roots?

Answer 13

S1 and S2

Question 14

Superior gluteal nerve is made up of fibers from which roots?

Its superior branch supplies?

Inferior branch?

Answer 14

L4, L5 and S1

Gluteus medius and minimus

Gluteus medius, minimus, and TFL

Question 15

The Inferior gluteal nerve carries fibers from which roots?

Supplies?

Answer 15

L5, S1 and S2

Gluteus maximus

Question 16

The Perforating Cutaneous Nerve contains fibers from which roots?

Answer 16

S2 and S3

Question 17

The posterior cutaneous nerve of the thigh is formed by which roots?

Answer 17

Anterior S2 and S3

Posterior S1 and S2

Question 18

The sciatic nerve is combo of which nerves and their roots?

Answer 18

Tibial - anterior L4-S3

Common fibular - posterior L4-S2

Question 19

Common fibular nerve supplies which muscle in the thigh?

Answer 19

Biceps femoris (short head)

Question 20

Two sensory branches off of the common fibular nerve give off along lateral popliteal fossa. what are they?

Answer 20

Lateral sural cutaneous nerve

Fibular communicating branch

Question 21

What does the superficial fibular nerve supply?

It splits into which two things that supply skin over dorsal foot?

Deep fibular nerve?

Answer 21

Fibularis longus
Fibularis brevis

Medial and intermediate dorsal cutaneous nerves

Tibialis anterior
Extensor digitorum longus
Extensor digitiorum brevis
Extensor hallucis longus
Extensor hallucis brevis
Fibularis tertius

Question 22

Clinical consideration for the Common Fibular nerve?

Answer 22

Steppage gait

Question 23

The tibial nerve is made from which root fibers?

While still combined with CF nerve which muslces does it supply?

Answer 23

L4 - S3

Biceps femoris (long head)
Semitendinosus
Semimembranosus
Adductor magnus

Question 24

In the popliteal fossa the tibial nerve supplies which muscles?

Answer 24

Popliteus
Gastrocnemius
Soleus
Plantaris

Question 25

The popliteal branch of the tibial nerve gives rise to which nerve?

Answer 25

Interosseous nerve of the leg

Question 26

In the leg, the tibial nerve gives rise to muscular branches that supply? Sensory branches that supply?

Answer 26

Flexor digitorum longus Flexor hallucis longus Medial calcaneal branches for skin over medial heel

Question 27

The tibial nerve travels around medial malleolus to plantar foot and divides into which two nerves?

Answer 27

Medial plantar nerve | Lateral plantar nerve

Question 28

What does the medial plantar nerve supply? What does it divide into? that supplies lumbricals 1 and 2 Sensory supply to skin between toes from what nerve?

Answer 28

Abductor halluces Flexor digitorum brevis Flexor hallucis brevis Common plantar digital nerves Proper plantar digital nerves

Question 29

Latera plantar nerve divides into what two branches and what do they supply?

Answer 29

Superficial branch - skin around digit 5 Deep - adductor halluces Flexor digiti minimi brevis lateral lumbricals interossei muscles

Question 30

Clinical considerations for Tibial nerve?

Answer 30

Flexor paralysis Hammer toes Claw foot