Anatomy - nerves

Question 1

what is a myotome and how is it used to assess radiculopathy?

Answer 1

Mytomes refer to a set of muscles innervated by a specific nerve and is tested by using resisted muscle movements. Weakness to muscles in a particular myotome may help identify the level of nerve root compromise

Question 2

what myotome is responsible for shoulder girdle elevation?

Answer 2

C4

Question 3

what myotome is responsible for shoulder abduction?

Answer 3

C5

Question 4

what myotome is responsible for elbow flexion?

Answer 4

C6

Question 5

what myotome is responsible for elbow extension?

Answer 5

C7

Question 6

what myotome is responsible for thumb extension?

Answer 6

C8

Question 7

what myotome is responsible for finger abduction?

Answer 7

T1

Question 8

what myotome is responsible for hip flexion?

Answer 8

L2

Question 9

what myotome is responsible for knee extension?

Answer 9

L3

Question 10

what myotome is responsible for ankle dorsiflexion?

Answer 10

L4

Question 11

what myotome is responsible for big toe extension?

Answer 11

L5

Question 12

what myotome is responsible for ankle plantarflexion?

Answer 12

S1

Question 13

what is a dermatome?

Answer 13

An area of skin supplied by a single spinal nerve and responsible for sensation

Question 14

what dermatome covers the lateral arm and the thumb?

Answer 14

C6

Question 15

What dermatome covers the middle finger and central posterior forearm?

Answer 15

C7

Question 16

what dermatome covers the little finger and medial forearm?

Answer 16

C8

Question 17

what dermatome covers the lateral upper arm and shoulder?

Answer 17

C5

Question 18

what dermatome covers medial forearm near the elbow?

Answer 18

T1

Question 19

What dermatome covers the anterior thigh coming across to the medial knee?

Answer 19

L3

Question 20

what dermatome covers the anterior thigh coming across to the medial side of the foot including the hallux and the medial sole of the foot?

Answer 20

L4

Question 21

what dermatome covers the lateral side of the leg from the knee down, the dorsum of the foot, and the middle three toes

Answer 21

L5

Question 22

what dermatome covers the posterior aspect of the leg, the lateral side of the lower leg, the little toe, and the lateral side of the sole of the foot

Answer 22

S1

Question 23

what dermatome covers the posterior thigh and the heel of the foot?

Answer 23

S2

Question 24

The femoral nerve is derived from which spinal nerve root?

Answer 24

L2-L4

Question 25

The obturator nerve is derived from which spinal nerve root?

Answer 25

L2-L4

Question 26

The superior gluteal nerve is derived from which spinal nerve?

Answer 26

L4-S1

Question 27

The inferior gluteal nerve is derived from which spinal nerve?

Answer 27

L5-S2

Question 28

The sciatic nerve is derived from which spinal nerve?

Answer 28

L4-S3

Question 29

The common peroneal nerve (then split into the deep peroneal and superficial peroneal) is derived from which spinal nerve?

Answer 29

L4-S2

Question 30

The musculocutaneous nerve is derived from which spinal nerve?

Answer 30

C5-C7

Question 31

The axillary nerve is derived from which spinal nerve?

Answer 31

C5-C6

Question 32

The median nerve is derived from which spinal nerve?

Answer 32

C5-T1

Question 33

The ulnar nerve is derived from which spinal nerve?

Answer 33

C8-T1

Question 34

What is the dorsiflexors (tibialis anterior, EDH, EHL) nerve supply?

Answer 34

deep peroneal nerve

Question 35

What is the plantarflexors (tibialis anterior, EDH, EHL) nerve supply?

Answer 35

Tibial nerve

Question 36

What is the evertors (peroneus longus, peroneus brevis) nerve supply?

Answer 36

Superficial peroneal nerve

Question 37

What is the tibialis anterior's nerve supply?

Answer 37

Deep peroneal nerve

Question 38

What is the tibialis posterior's nerve supply?

Answer 38

Tibial nerve

Question 39

what is the knee extensors (quadriceps - rectus femoris, vastus medialis, vastus lateralis, vastus intermedius) nerve supply?

Answer 39

Femoral nerve

Question 40

what is the hip extensor, knee flexor (biceps femoris short head and long head) nerve supply?

Answer 40

long head - tibial branch of the sciatic nerve short head - peroneal branch of the sciatic nerve

Question 41

what is the hip extensor and knee flexor (semiteninosus) nerve supply?

Answer 41

tibial branch of the sciatic nerve

Question 42

what is the hip extensor knee flexor (semimembranosus) nerve supply?

Answer 42

Tibial branch of the sciatic nerve

Question 43

what is the sartorius (hip flexion, hip abduction & knee flexion, medial rotation) nerve supply?

Answer 43

femoral nerve

Question 44

what is the popliteus (knee flexion and medial rotation) nerve supply?

Answer 44

Tibial nerve

Question 45

what is the iliopsoas (hip flexor) nerve supply

Answer 45

femoral and anterior rami of L1-L4

Question 46

what is the rectus femoris (hip flexor) nerve supply?

Answer 46

Femoral

Question 47

What is the TFL (hip flexor) nerve supply?

Answer 47

Superior gluteal nerve

Question 48

what is the gluteus maximus (hip extensor and abductor) nerve supply?

Answer 48

Inferior gluteal

Question 49

what is the adductor magnus (hip adductor) nerve supply?

Answer 49

Adductor part/flexes the hip - obturator nerve The part that extends the hip - tibial branch of the sciatic nerve

Question 50

what is the hip adductors (adductor magnus, adductor longus, adductor brevis, pectineus, gracilis) nerve supply?

Answer 50

Obturator nerve

Question 51

what is the pectineus (hip adductor) nerve supply?

Answer 51

Femoral nerve

Question 52

what is the gluteus medius and gluteus minimus (hip abductors and medial rotators) nerve supply?

Answer 52

superior gluteal nerve

Question 53

what is the anterior deltoid (shoulder flexor) nerve supply?

Answer 53

Axillary

Question 54

what is the biceps brachii and coracobrachialis (shoulder flexors) nerve supply?

Answer 54

Musculocultaneous

Question 55

What is the pectoralis major (shoulder flexor) nerve supply? (There is 2: 1 for upper fibres and 1 for lower fibres

Answer 55

Upper fibres: Lateral pectoral nerve Lower fibres: Medial pectoral nerve