PNS

Question 1

Peripheral nervous system

Answer 1

Serves as their interface between the CNS, the rest of the body and surrounding environment in which we live

Question 2

Cranial nerves

Answer 2

Nerves that emerge directly from the brain
Relay information between brain and other parts of the body especially the head and neck

Question 3

How many pairs of cranial nerves are there

Answer 3

12

Question 4

CN I
Olfactory nerve

Answer 4

Sensory innervation: smell

Question 5

CN II
Optic nerve

Answer 5

Sensory: sight/ vision

Question 6

CN III
Oculomotor

Answer 6

Motor: eye movement

Question 7

CN IV
Trochlear nerve

Answer 7

Motor: eye movement

Question 8

CN V
trigeminal

Answer 8

Sensory: facial sensation
Motor: chewing muscles

Question 9

CN VI
abducens

Answer 9

Motor: eye movement

Question 10

CN VII
facial nerve

Answer 10

Sensory: taste from anterior 2/3 of tongue
Motor: muscle of facial expression

Question 11

CN VIII
vestibutocohlear ( auditory nerve)

Answer 11

Sensory: equilibrium and hearing

Question 12

CN IX
glossopharyngeal nerve

Answer 12

Sensory: taste of posterior from 1/3 of tongue
Motor: swallowing

Question 13

CN X
vagus nerve

Answer 13

Only cranial nerve that travels into thoracic and abdomen
Sensory: from throat, thoracic and abdominal visceral
Motor: swallowing muscle, diaphragm and motor activity of thoracic and abdominal visceral

Question 14

CN XI
accessory nerve

Answer 14

Motor: head rotation and shoulder movement

Question 15

CN XIII
hypoglossal nerve

Answer 15

Motor: tongue movement for speech and swallowing

Question 16

Spinal nerve

Answer 16

Each segment of spinal cord is connected to a pair of spinal nerves which innervate respective side of the body

Question 17

How many spinal nerves are there

Answer 17

There are 31 nerves entering and exiting the spinal nerves at various levels

Question 18

__  Pairs of cervical nerves

Answer 18

C1-C8

Question 19

__ pairs of thoracic nerves

Answer 19

T1-T12

Question 20

__ pairs of lumbar nerves

Answer 20

L1-L5

Question 21

__ Pairs of sacral nerve

Answer 21

S1-S5

Question 22

__pairs of coccygeal nerves

Answer 22

CO1

Question 23

Why are there eight pairs of cervical nerves but seven cervical vertebrae

Answer 23

Spinal nerve C1 exits superior to vertebra C1 whereas spinal nerve C8 exits inferior to vertebrae C7

Question 24

Dorsal root

Answer 24

Posterior and provide sensory input
Contains the axons of sensory neurons who sells bodies are located in dorsal root ganglia

Question 25

Dorsal root ganglion

Answer 25

Cluster of nuclei present only on the dorsal root

Question 26

Ventral root

Answer 26

Anterior and delivers motor input Contains the axons of Motor neurons who Cell bodies are located in gray matter tracks of spinal cord

Question 27

Roots

Answer 27

Medial to spinal nerves and strictly sensory or motor fibers

Question 28

Rami

Answer 28

Lateral to spinal nerves and contain sensory and motor fibers

Question 29

Nerve plexuses

Answer 29

Net work of parietal nerves

Question 30

 The ventral rami of all spinal nerves branch and join one another lateral to The vertebral column to form a plexus which

Answer 30

Primarily innervate limbs

Question 31

Fibers from different ventral rami redistribute so that

Answer 31

Each end branch Of the plexus Contains fibers from Several different spinal nerves Fibers from each central Remus travel to the body periphery via several different branches 

Question 32

Cervical plexus

Answer 32

Neck Innervate skin and muscles of neck

Question 33

Cervical plexus Phrenic nerve

Answer 33

Most important branch of the cervical plexus Receives fibers from C3-C5 Innervates diaphragm

Question 34

Brachial plexus

Answer 34

Lower neck and axiliary region Receives fibers from C5-T1 Innervates upper limb 

Question 35

Brachial plexus Musculocutaneous nerve

Answer 35

Innervates biceps brachii and brachialis Distal to the elbow it provides sensation of lateral forearm 

Question 36

Brachial plexus median nerve

Answer 36

Innervates both vessels of the anterior forearm Passes to get carpal tunnel and innervates the muscle of lateral palm

Question 37

Brachial plexus Ulnar nerve

Answer 37

Travels along the medial side of arm at the elbow it passes posterior to the medial epicondyle Innervates most hand muscles receives sensory input from medial hand

Question 38

Brachial plexus Radial nerve

Answer 38

Innervates post to your side of upper limb receives sensory input from dorsal lateral hand

Question 39

Lumbar plexus

Answer 39

Psoas major muscle Receives fibers from L1- L5 Smaller branches innervate parts of abdominal wall in the Psoas but its main branch descend to innervate anterior thigh

Question 40

Lumbar plexus Femoral nerve

Answer 40

Runs deep to inguinal ligament Innervates anterior thigh muscle

Question 41

Lumbar plexus Obturator nerve

Answer 41

Passes through obturator foramen Of the pelvis to enter medial thigh Innervates adductor muscles

Question 42

Sacral plexus

Answer 42

Inferior to lumbar plexus Receives fibers from L4-S4 Innervates pelvis, buttox, lower limb

Question 43

Lumbosacral plexus

Answer 43

Lumbar and sacral plexuses are often Combined since some fibers from the lumbar plexus contribute to the sacral plexus

Question 44

Lumbosacral plexus Sciatic nerve

Answer 44

Largest nerve in body passes through greater sciatic notch innervates posterior thigh Branches into the tibial nerve in common fibular nerve

Question 45

 Lumbosacral plexus Tibial nerve

Answer 45

Innervates all muscles in posterior leg as well as skin on sole of feet

Question 46

Lumbosacral plexus Common fibular nerve ( common peroneal)

Answer 46

Innervates antrolateral leg

Question 47

Lumbosacral plexus Pudendal nerve

Answer 47

Innervates muscles and skin of perineum help stimulate erection and sexual arousal

Question 48

Autonomic nervous system

Answer 48

System of motor neurons that innervate smooth, cardiac muscles and glands

Question 49

Sympathetic nervous system

Answer 49

Fight or flight controlled by E and norepinephrine Mobilize body to respond to stress when more energy is needed

Question 50

Parasympathetic nervous system

Answer 50

Rest and digest controlled by vagus nerve routine maintenance and allows body to relax and conserve energy