PERIPHERAL CUTANEOUS NERVES

Question 1

peripheral cutaneous innervation of the neck

Answer 1

posteriorly: mainly posterior rami of the spinal nerves C2-C8
Anterolaterally: sensory branches of the cervical plexus
- refer to the picture

Question 2

Spinal Nerve root(s) of Lesser occipital nerve

Answer 2

C2

Question 3

Spinal Nerve root(s) of great auricular nerve

Answer 3

C2, C3

Question 4

Spinal Nerve root(s) of transverse cervical

Answer 4

C2, C3

Question 5

Spinal Nerve root(s) of supraclavicular nerves

Answer 5

C3, C4

Question 6

label

Answer 6

Question 7

peripheral cutaneous innervation: upper anterolateral trunk wall (named nerve and the nerve root value)

Answer 7

intercostal nerves - T1 to T11
subcostal nerves - T12

Question 8

peripheral cutaneous innervation: lower anterolateral trunk wall (named nerve and the nerve root value)

Answer 8

iliohypogastric nerve - anterior rami of L1
ilioinguinal nerve - anterior rami of T12 - L1

Question 9

upper limb peripheral cutaneous nerves anterior

Answer 9

picture in next question

Question 10

upper limb peripheral cutaneous nerves posterior

Answer 10

Question 11

NERVE ROOT VALUE: ilioinguinal nerve

Answer 11

L1

Question 12

NERVE ROOT VALUE: genitofemoral nerve

Answer 12

L1, L2

Question 13

NERVE ROOT VALUE: lateral cutaneous nerve of the thigh

Answer 13

L2, L3

Question 14

NERVE ROOT VALUE: posterior cutaneous nerve of the thigh

Answer 14

S1, S2, S3

Question 15

NERVE ROOT VALUE: obturator nerve

Answer 15

L2, L3, L4

Question 16

NERVE ROOT VALUE: Femoral nerve

Answer 16

L2, L3, L4

Question 17

NERVE ROOT VALUE: Saphenous nerve

Answer 17

L3, L4
(br of femoral nerve)

Question 18

NERVE ROOT VALUE: Sural nerve

Answer 18

S1, S2
(br of tibial and common fibular)

Question 19

NERVE ROOT VALUE: Superficial fibular nerve

Answer 19

L4, L5, S1

Question 20

NERVE ROOT VALUE: Deep fibular nerve

Answer 20

L5

Question 21

NERVE ROOT VALUE: Calcaneal nerves, medial & lateral plantar nerves

Answer 21

L4, L5, S1, S2, S3
(brs of tibial nerve)

Question 22

testing sensory function of the a peripheral cutaneous nerve (eg femoral nerve at the point shown in the diagram): components involved and the pathway

Answer 22

receptors at the L2 region are stimulated –> AP are generated which pass through the axon centrally and through the anterior rami of the L2 SN through Lumbar plexus –> L2 SN –> posterior root of L2 spinal nerve –> posterior rootlets –> posterior horn –> ascending tract –> primary somatosensory cortex

Question 23

cervical plexus nerve root value(s) and the muscles supplied by it

Answer 23

C1-C4
neck postural and strap muscles
diaphragm (C3, C4, C5)

Question 24

brachial plexus nerve root value(s) and the muscles supplied by it

Answer 24

C5-T1
muscles of the upper limb
Extrinsic back muscles

Question 25

muscles supplied by T2-L3

Answer 25

postural back muscles
ICM and anterolateral abdominal wall muscles

Question 26

LS plexus nerve root value(s) and the muscles supplied by it

Answer 26

L1-S4
muscles of the lower limb
perineal skeletal muscles

Question 27

biceps reflex : Nerve root value

Answer 27

C5, (C6)

Question 28

supinator/brachioradialis reflex : Nerve root value

Answer 28

C6

Question 29

triceps reflex : Nerve root value

Answer 29

C7

Question 30

Knee jerk reflex : Nerve root value

Answer 30

L4

Question 31

ankle jerk reflex : Nerve root value

Answer 31

S1

Question 32

Muscle paralysis

Answer 32

• a muscle without a functioning motor nerve supply
• can’t contract
• decreased muscle tone o/e

Question 33

muscle spasticity

Answer 33

• a muscle with an intact and functioning motor nerve supply
• descending control of the brain are not working
• increased muscle tone o/e

Question 34

Muscle paralysis VS spasticity

Answer 34