LE Facts

Question 1

Iliohypogastric n.

Answer 1

T12-L1
Sensory- suprapubic
Motor- transversus abdominis and int. oblique
Cause of injury (CoI) abdominal surgery
Present: burn/tingle in surgical incision site radiating to inguinal and suprapubic regions

Question 2

Genitofemoral n.

Answer 2

L1-2
Sensory: scrotum/labia majora, med. thigh
Motor: cremaster
CoI: laparascopy
Pres: ant. thight sensation beneath inguinal lig. diminished and no cremasteric reflex

Question 3

Lateral femoral cutaneous n.

Answer 3

L2-3
Sensory- anterolateral thigh
CoI: tight clothes, preg., obesity

Question 4

Obdurator n.

Answer 4

L2-4
Sensory: medial thigh
Motor: obdurator externus, adductor longus/brevis, gracilis, pectineus, adductor magnus
CoI- pelvic surgery
Pres: decreased sensation ond weak adduction

Question 5

Femoral n.

Answer 5

L2-4
Sensory is anterior thigh and medial leg
Motor: quadriceps, iliopsoas, sartorius
CoI- pelvic fx
Pres: diminished thigh flexion and leg extension

Question 6

Sciatic n.

Answer 6

L4-S3
Sensory: post-thigh
Motor: Hamstrings, and adductor magnus
CoI: herniated disc
Splits into common peroneal and tibial nn

Question 7

Common peroneal n.

Answer 7

L4-S2
Sensory: dorsum of foot
Motor, biceps femoris, tibialis anterior, foot ext.
CoI: trauma or compression of lateral leg or fx of fibula neck
Pres: PED: peroneal everts and dorsiflexes
So injury is inverted and plantar flexed leading to steppage gate

Question 8

Tibial n.

Answer 8

L4-S3
Sensory: sole of foot
Motor: triceps surae, plantaris, popliteus, foot flex
CoI: knee trauma, baker cysts, tarsal tunnel
TIP: tibial inverts and plantar flexes so opposite

Question 9

Sup. gluteal n.

Answer 9

L4-S1
Motor: gluteus medius/minimus, tensor fascia lata
CoI- iatrogenic injury during IM injection
Present:
Trendelenberg sign/gait: lesion is contralateral to side that drops and ipsilateral to the foot being stood on
IM in superolateral quadrant

Question 10

Inf. gluteal n.

Answer 10

L5-S2
Motor- gluteus maximus
CoI: post. hip dislocation
Pres: difficulty climbing stairs, rising or loss of hip extension

Question 11

Pudendal n.

Answer 11

S2-S4
Sensory- perineum
Motor: ext. urethral and anal sphincters
CoI: stretch injury at birth
Pres: decreased sensation, incontinence

Question 12

Hip abductors

Answer 12

Gluteus medius, gluteus minimus

Question 13

Hip adductors

Answer 13

Adductor magnus, adductor longus, adductor brevis

Question 14

Hip extensors

Answer 14

Gluteus maximus, semitendinosus, semimembranosus

Question 15

Hip flexors

Answer 15

Iliopsoas, rectus femoris, tensor fascia lata, pectineus

Question 16

Hip internal rotators

Answer 16

Gluteus medius, gluteus minimus, tensor fascia lata

Question 17

Hip external rotators

Answer 17

Ilipsoas, gluteus maximus, piriformis, obdurator

Question 18

Herniation of L3-4 disc

Answer 18

weakness of knee extension, decrease patellar DTR

Question 19

Herniation of L4-5 disc

Answer 19

weakness of dorsiflexion, hard to heel walk

Question 20

Herniation of L5-S1 disc

Answer 20

Weakness of plantar flexion, can’t toe-walk, decreased Achilles DTR

Question 21

Artery and nerve in axilla

Answer 21

Long thoracic n. and lateral thoracic a.

Question 22

Artery and nerve in neck of humerus

Answer 22

Axillary n. and post. circumflex a.

Question 23

Artery and nerve in midshaft of humerus

Answer 23

radial n. and deep brachial a.

Question 24

Artery and nerve in distal humerus/cubital fossa

Answer 24

median n. and brachial a.

Question 25

Artery and nerve in popliteal fossa

Answer 25

tibial n. and popliteal a.

Question 26

Artery and nerve posterior to med. malleolus

Answer 26

tibial n. and posterior tibial