Nerve

Question 1

Axillary Nerve

Answer 1

Roots: C5 and C6

Motor: Innervates the deltoid, teres minor and the long head of the triceps brachii

Sensory: Gives off the superior lateral cutaneous nerve of arm, which innervates the inferior region of the deltoid (?regimental badge area?)

Question 2

Median Nerve

Answer 2

Roots: C6 - T1

Motor: Innervatesthe flexor muscles in the forearm (except flexor capri ulnaris and part of the flexor digitorum profundus), the thenar muscles, and the two lateral lumbrical muscles that move the index and middle fingers

Sensory: Gives off the palmar cutaneous branch, which innervates the lateral part of the palm, and the digital cutaneous branch, which innervates the lateral three and a half fingers on the anterior (palmar) surface of the hand.

Question 3

Radial Nerve

Answer 3

Roots: C5 - T1

Motor: innervates the triceps brachii, and the extensor muscles in the posterior compartment of the forearm.

Sensory: Innervates the posterior aspect of the arm and forearm, and the posterior, lateral aspect of the hand.

Question 4

Ulnar Nerve

Answer 4

Roots: C8 - T1

Motor: Innervates the muscles of the hand (apart from the thenar muscles and two lateral lumbricals), flexor carpi ulnaris and medial half of flexor digitorum profundus

Sensory: Innervates the anterior and posterior surfaces of the medial one and half fingers, and associated palm area

Question 5

Iliohypogastric

Answer 5

Roots: T12 - L1

Motor: Transversus abdominis, abdominal internal oblique (obliquus internus)

Question 7

Genitofemoral

Answer 7

Roots: L1 - L2

Motor: Cremaster in males

Question 8

Lateral femoral cutaneous

Answer 8

Roots: L2 - L3

Sensory Innervation: lateral femoral cutaneous

Question 9

Obturator

Answer 9

Roots: L2 - L4

Motor: Obturator externus, Adductor longus, Adductor brevis, Adductor Magnus, Gracilis

Question 10

Femoral (posterior)

Answer 10

Roots: L2 - L4

Motor: Innervates the anterior thigh muscles that flex the hip joint (pectineus, iliacus, sartorius) and extend the knee (quadriceps femoris: rectus femoris, vastus lateralis, vastus medialis and vastus intermedius)

Question 11

Short, direct muscular branches

Answer 11

Roots: T12 - L4

Motor: Psoas major, Quadratus lumborum, Iliacus, Lumbar intertransverse

Question 12

Obturator

Answer 12

Roots: L2 - L4

Motor: Obturator externus, Adductor longus, Adductor brevis, Gracilis, Pectineus

Question 13

White Ramus

Answer 13

Preganglionic sympathetic

Question 14

Grey Ramus

Answer 14

Postganglionic sympathetic

Question 15

Inferior Gluteal

Answer 15

Roots: L4-S2

Motor: Gluteus Maximus

Question 16

Superior Gluteal

Answer 16

Roots: L4-S1

Motor: Gluteus medius, Gluteus minimus, Tensor fasciae latae

Question 17

Piriformis

Answer 17

Roots: S1-S2

Motor: Piriformis

Question 18

Obturator Internus

Answer 18

Roots: L5-S2

Motor: Obturator Internus

Question 19

Quadratus Femoris

Answer 19

Roots: L4-S1

Motor: Quadratus Femoris

Question 20

Sciatic

Answer 20

Roots: L4-S3

Motor: Semitendinosus (Tib), Semimembranosus (Tib), Biceps femoris: Long head (Tib) and Short head (Fib), Adductor magnus (medial part, Tib)

Question 21

Superficial Fibular

Answer 21

Roots: L4-S2

Motor: Peroneus Longuns, Peroneous brevis

Question 22

Deep Fibular

Answer 22

Roots: L4-S2

Motor: Tibialis anterior, Extensor digitorum longus, peroneus tertius, and extensor hallucis longus

Question 23

Tibial Nerve

Answer 23

Roots: L4-S3

Motor: Triceps surae, Plantaris, Popliteus, Tibialis posterior, Flexor digitorum longus, Flexor hallucis longus

Question 24

Medial Plantar

Answer 24

Roots: L4-S2

Motor: Abductor hallucis, Flexor digitorum brevis, Flexor hallucis brevis (medial head), Lumbrical (first and second)

Question 25

Lateral Plantar

Answer 25

Roots: L4-S2

Motor: Flexor hallucis brevis (lateral head), Quadratus plantae, Abductor digiti minimi, Flexor digiti minimi, Lumbrical (third and fourth), Plantar interossei (first to third), Dorsal interossei (first to fifth), Adductor hallucis

Question 26

Pudendal

Answer 26

Roots: S2-S4 Motor: Muscles of the pelvic floor: Levator ani, Superficial transverse perineal, Deep transverse perineal, Bulbospongiosus, Ischiocavernosus, Sphincter anus externus, Urethral sphincter

Question 27

Coccygeal

Answer 27

Roots: S5-CO1 Motor: Coccygeus

Question 28

Common Peroneal (fibular)

Answer 28

Roots: L4-S2 Motor: Peroneus Longus, Peroneus Brevis and the short head of the biceps femoris.

Question 29

Dorsal Scapular

Answer 29

Roots: C5 Motor: Rhomboids (pull scapular towards spine) and the levator scapulae muscles (elevate the scapula)

Question 30

Long Thoracic

Answer 30

Roots: C5-C7 Motor: Serratus Anterior (pulls scapular anteriorly around the thorax)

Question 31

Suprascapular

Answer 31

Roots: C5-C6 Motor: Supraspinatus and infraspinatus muscles

Question 32

Lateral Pectoral

Answer 32

Roots: Lateral cord of the brachial plexus (C5-C7) Motor: Pectoralis Major

Question 33

Medial Pectoral

Answer 33

Roots: Medial Cord of BP (C8-T1) Motor: Pectoralis Minor and Pectoralis Major

Question 34

Upper Subscapular

Answer 34

Roots: C5-C6 Motor: Upper portion of Subscapularis

Question 35

Middle (thoracodorsal) Subscapular

Answer 35

Roots: C6-C8 Motor: Latissimus Dorsi (from the ventral rami even though the latissimus dorsi is found in the back)

Question 36

Lower Subscapular

Answer 36

Roots: C5-C6 Motor: Lower portion of the subscapularis muscle and the teres major muscle

Question 37

Musculocutaneous Nerve

Answer 37

Roots: C5, C6, C7 Motor: Innervates the brachialis, biceps brachii and corocobrachialis Sensory: Gives off the lateral cutaneous branch of the forearm (lateral half of anterior forearm and a small lateral portion of the posterior forearm)"