Muscle Innervations

Question 1

Trapezius

Answer 1

Motor = Spinal accessory nerve CN 11
Sensory = C3-C4

Question 2

Latissimus Dorsi

Answer 2

Thoracodorsal nerve (C6-8) *posterior cord of brachial plexus

Question 3

Levator Scapulae
Rhomboid Major
Rhomboid Minor

Answer 3

Dorsal scapular nerve (C4-C5)

Question 4

Serratus Posterior Superior / Inferior

Answer 4

Superior = Intercostal nerves 2-5
Inferior = spinal nerves T9-T12 anterior rami

Question 5

Splenus Capitis

Splenus Cervicis

Answer 5

C1-C6 posterior rami

Question 6

Iliocostalis (Erector Spinae)

Answer 6

C8-L1 posterior rami

Question 7

Longissimus (Erector Spinae)

Answer 7

C1-L5 posterior rami

Question 8

Spinalis (Erector Spinae)

Answer 8

posterior rami of spinal nerves

Question 9

Transversospinal group (semispinalis capitis and cervicis, rotators, levatores costarum, multifidus)

Answer 9

posterior rami of spinal nerves

Question 10

Suboccipital Triangle (obliquus capitis inferior and superior, rectus capitis posterior major and minor)

Answer 10

Suboccipital nerve (C1 posterior rami)

Question 11

Intercostals (external, internal, and innermost)

Answer 11

Intercostal nerves 1-11

Question 12

Transversus Thoracis

Answer 12

Intercostal nerves 2-7

Question 13

External Abdominal Oblique

Answer 13

Intercostal nerves T7-T12

Question 14

Internal Abdominial Oblique

Transversus Abdominis

Answer 14

Intercostal nerves T7-T12, iliohypogastric nerve, ilioinguinal nerve

Question 15

Rectus Abdominis

Answer 15

Intercostal nerves T5-T12

Question 16

Quadratus Lumborum

Answer 16

T12-L4

Question 17

Deltoid

Teres Minor

Answer 17

Axillary nerve (C5-C6)

Question 18

Pectoralis Major

Answer 18

Medial and lateral pectoral nerves (C5-T1)

Question 19

Pectoralis Minor

Answer 19

Medial pectoral nerve (C8-T1)

Question 20

Teres Major

Answer 20

Lower subscapular nerve (C5-C7)

Question 21

Subscapularis

Answer 21

Subscapular nerve (C5-C6)

Question 22

Serratus Anterior

Answer 22

Long thoracic nerve (C5-C7)

Question 23

Triceps Brachii

Anconeus

Answer 23

Radial nerve (C6-C8)

Question 24

Supraspinatus

Infraspinatus

Answer 24

Subscapular nerve (C5-C6)

Question 25

Biceps Brachii

Answer 25

Musculocuntaneous nerve (C5-C6)

Question 26

Coracobrachialis

Answer 26

Musculocutaneous nerve (C5-C7)

Question 27

Brachialis

Answer 27

Musculocutaneous nerve (C5-C6) and Radial nerve (C7)

Question 28

Brachioradialis

Answer 28

Radial nerve (C5-C6)

Question 29

Pronator Teres | Flexor Carpi Radialis

Answer 29

Median nerve (C6-C7)

Question 30

Palmaris Longus Flexor Pollicis Longus Pronator Quadratus

Answer 30

Median nerve (C7-C8)

Question 31

Flexor Carpi Ulnaris

Answer 31

Ulnar nerve (C7-T1)

Question 32

Flexor Digitorum Superficialis Lumbricals Abductor Pollicis Brevis Opponens Pollicis

Answer 32

Median Nerve (C8-T1)

Question 33

Flexor Digitorum Profundus

Answer 33

Median nerve (C8-T1) and Ulnar nerve (C8-T1)

Question 34

Extensor Carpi Radialis Longus | Supinator

Answer 34

Radial nerve (C6-C7)

Question 35

``` Extensor Carpi Radialis Brevis Extensor Digitorum Extensor Digiti Minimi Extensor Carpi Ulnaris Abductor Pollicis Longus Extensor Pollicis Longus & Brevis Extensor Indicis ```

Answer 35

Radial nerve (C7-C8)

Question 36

``` Dorsal Interossei (Hand) Palmaris Brevis Palmar Interossei Adductor Pollicis Abductor Digiti Minimi Flexor Digiti Minimi Brevis Opponens Digiti Minimi ```

Answer 36

Ulnar nerve (C8-T1)

Question 37

Flexor Pollicis Brevis

Answer 37

Ulnar nerve (C8-T1) and Median nerve (C8-T1)

Question 38

Gluteus Maximus

Answer 38

Inferior gluteal nerve (L5-S2)

Question 39

Gluteus Medius Gluteus Minimus Tensor Fascia Latae

Answer 39

Superior gluteal nerve (L4-S1)

Question 40

Piriformis

Answer 40

Sacral plexus (S1-S2)

Question 41

Obturator Internus Quadratus Femoris Superior and Inferior Gemelli

Answer 41

Sacral plexus (L5-S1)

Question 42

Psoas Major

Answer 42

Lumbar plexus (L2-L4)

Question 43

Iliacus Rectus Femoris Vasti (Medialis, Lateralis, Intermedius)

Answer 43

Femoral nerve (L2-L4)

Question 44

Sartorius

Answer 44

Femoral nerve (L2-L3)

Question 45

Pectineus

Answer 45

Femoral nerve and Obturator nerve (L2-L3)

Question 46

Obturator Externus | Adductor Longus

Answer 46

Obturator nerve (L2-L4)

Question 47

Gracilis | Adductor Brevis

Answer 47

Obturator nerve (L2-L3)

Question 48

Adductor Magnus

Answer 48

Obturator nerve (L2-L4) and Tibial nerve (L4)

Question 49

Biceps Femoris

Answer 49

Long head = Tibial nerve (L5-S2) | Short head = Common fibular nerve (L5-S2)

Question 50

Semitendinosus Semimembranosis Flexor Digitorum Longus Flexor Hallucis Longus

Answer 50

Tibial nerve (L5-S2)

Question 51

Tibialis Anterior

Answer 51

Deep fibular nerve (L4-L5)

Question 52

Extensor digitorum Longus Peroneus (Fibularis) Tertius Extensor Hallucis Brevis Extensor Digitorum Brevis

Answer 52

Deep fibular nerve (L5-S1)

Question 53

Extensor Hallucis Longus

Answer 53

Deep fibular nerve (L5)

Question 54

Peroneus (Fibularis) Longus and Brevis

Answer 54

Superficial fibular nerve (L5-S1)

Question 55

Gastrocnemius Plantaris Soleus

Answer 55

Tibial nerve (S1-S2)

Question 56

Popliteus

Answer 56

Tibial nerve (L4-S1)

Question 57

Tibialis Posterior

Answer 57

Tibial nerve (L4-L5)

Question 58

Flexor Digitorum Brevis (Foot) Abductor Hallucis 1st Lumbrical

Answer 58

Medial plantar nerve (S1-S2)

Question 59

``` Abductor Digiti Minimi (Foot) Quadratus Plantae 2,3,4 Lumbricals Adductor Hallucis Flexor Digiti Minimi Brevis Dorsal Interossei Plantar Interossei ```

Answer 59

Lateral plantar nerve (S1-S3)

Question 60

Flexor Hallucis Brevis

Answer 60

Medial plantar nerve (S1-S2) and Lateral plantar nerve (S1-S2)