Anatomy

Question 1

Difficulty standing from sitting position, which nerve might be affected

Answer 1

Inferior gluteal nerve

Question 2

Major hip flexor?

Answer 2

Illiopsoas muscle

Question 3

Major hip extensor?

Answer 3

Gluteus maximus

Question 4

Muscles of the anterior compartment of the thigh

Answer 4

Sartorius and quads

Question 5

Muscles of the medial compartment of the thigh

Answer 5

Pectineus, Gracilis, Adductors

Question 6

What nerve innervates the gracilis

Answer 6

Obturator nerve

Question 7

Obturator nerve and sciatic nerve supply what muscle

Answer 7

Adductor Magnus

Question 8

Superior gluteal nerve supplies what muscles?

Injury presents how?

Answer 8

Gluteus minimus and medius, tensor fascia latae and piriformis
Trendelenburg sign. Pelvis tilts with walking because weight bearing leg cannot maintain balance.

Question 9

Lumbar plexus

Answer 9

network of nerves T12 to L4

Supplies skin and muscles of lower limb

Question 10

Sacral Plexus

Answer 10

L4 to S4

Skin and muscles of pelvis and lower limb

Question 11

What nerve derives from T12 to L1 level

Answer 11

Iliohypogastric nerve

Question 12

What nerve is motor to internal oblique and transverse abdominis

Answer 12

Iliohypogastric

Question 13

Innervates the cremasteric muscle?

Answer 13

Genital branch of genitofemoral nerve

Question 14

Motor function of the lateral cutaneous nerve of the thigh

Answer 14

None

Sensory: Innervates anterior and lateral thigh down to the level of the knee

Question 15

What nerve is sensory to the suprapubic region

Answer 15

Iliohypogastric

Question 16

Common source of injury to iliohypogastric nerve

Answer 16

Abdominal or pelvic surgery

Post transverse incisions, sutures may trap nerves

Question 17

Nerve from L1 to L2?

Answer 17

genitofemoral nerve

Question 18

Cremasteric reflex? what is it? How can it be lost?

Answer 18

Stroke inner thigh, scrotum rises on ipsilateral side

Injury to genitofemoral nerve

Question 19

Lateral femoral cutaneous nerve can be compressed how?

Answer 19

Tight clothing, obesity, pregnancy

Meralgia paresthetica - other thigh nerve syndrome, burning pain, paresthesia (numbness/tingling), hypesthesia (diminished sensation)

Question 20

Obturator nerve

Answer 20

Motor to thigh adductors
Adductor longs, brevis, Magnus, Obturator externus, gracilis

Sensory to small part of medial thigh

Can be injured during pelvic surgery.
Weak adduction

Question 21

Who innervates anterior thigh muscles, hip flexors, knee extensors

Answer 21

Femoral nerve

Question 22

Hip flexors?

Answer 22

The primary hip flexors are the pectineus, iliacus, and sartorius muscles

Question 23

Knee extensors

Answer 23

Quads (vastus intermedialis is deep to rectus femoris)

Question 24

Saphenous nerve?

Answer 24

Femoral nerve gives off saphenous nerve

Innervates skin on medial leg and foot

Saphenous vein stripping for CABG may damage saphenous nerve, causing numbness in lower leg

Question 25

Injury to femoral nerve?

Answer 25

Weak thigh flexion and knee extension, | absent patellar reflex

Question 26

Sciatic nerve

Answer 26

L4 to L3 Largest nerve in body Branches: common peroneal and tibial

Question 27

Common peroneal?

Answer 27

Branch: Superficial fibula - evert the foot Branch: deep fibula - dorsiflexion of foot, extension of toes

Question 28

Symptoms, common peroneal nerve injury

Answer 28

``` Foot drop (weak dorsiflexion ) Foot feels limp Sensory loss, dorm of foot, lateral shin ```

Question 29

Tibial nerve

Answer 29

Motor to posterior leg muscles Sensory to heel/toe Plantar flexion, toe flexion, inversion

Question 30

Pudendal nerve

Answer 30

s2-s4 Nerve supply to genital area SEnsory: penis, clitoris, skin of perineum

Question 31

Pudendal nerve block has been replaced by

Answer 31

Epidural

Question 32

Hip abductors?

Answer 32

Hip abduction is performed by the gluteus medius, minimus, piriformis and tensor fascia latae