Week 9: peripheral nerve supply

Question 1

Nervous system functions

Answer 1

• Control centre and communication network
• Senses, interprets and responds to changes

Question 2

Sensory neurons

Answer 2

transmit information about conditions in and out of the body

Question 3

Motor neurons

Answer 3

transmit information that controls the activity of muscle and glands

Question 4

Glial/support cells

Answer 4

provide protection and nutrition

Question 5

Central nervous system (CNS)

Answer 5

• Brain and co-located structures
• Spinal cord
• All protected by bones of the axial skeletons

Question 6

Where do cranial nerves emergy

Answer 6

brain
brainstem

Question 7

Cranial nerves supply

Answer 7

• Supply the musculoskeletal structures of the head and neck
• Supply the viscera of the thorax and abdomen

Question 8

Spinal nerves emergy from

Answer 8

spinal cord

Question 9

Spinal nerves supply what

Answer 9

Supply the structures of the trunk wall and the limbs

Question 10

How many pairs of cranial and spinal nerves

Answer 10

12 cranial 31 spinal

Question 11

Dorsal ramus

Answer 11

distributed to the back muscles and skin

Question 12

Ventral ramus

Answer 12

distributed to anterior, lateral trunk muscles & skin

Question 13

Ventral rami

Answer 13

distributed into the limbs to supply the muscles and skin

Question 14

Sensory distribution

Answer 14

• To skin: sensation
  (e.g. hot, cold, pain, touch, pressure)
• To joints: sensation of joint position (proprioception)

Question 15

Motor distribution

Answer 15

• To muscles: turns the muscle on & makes it contract (concentric, isometric or eccentric)
• To glands: increases secretion from gland (usually): supply to sweat glands produces

Question 16

L2 movement

Answer 16

hip flexion

Question 17

L3 movement

Answer 17

hip flexion
knee extension

Question 18

L4 movement

Answer 18

hip extension
knee extension
ankle dorsiflexion

Question 19

L5 movement

Answer 19

hip extension
knee flexion
ankle dorsiflexion
toe extension

Question 20

S1 movement

Answer 20

knee flexion
ankle plantarflexion
toe flexion
toe extension

Question 21

S2 movement

Answer 21

ankle plantarflexion
toe flexion

Question 22

L1 skin

Answer 22

inferior to inguinal ligament
ASIS to groin

Question 23

L2 skin

Answer 23

anterior thigh
greater troch to middle inner thigh

Question 24

L3 skin

Answer 24

anterior thigh
middle lat thigh to medial knee joint

Question 25

L4 skin

Answer 25

lateral anterior thigh
anterior knee
medial leg and foot

Question 26

L5 skin

Answer 26

lateral knee
middle anterior leg
central dorsal foot
section of posterior heel

Question 27

S1 skin

Answer 27

lateral buttock
lateral posterior thigh and leg
to lateral dorsum on foot

Question 28

S2 skin

Answer 28

middle buttock to posterior middle thigh and posterior central region of leg and skin of heel