innervations to compartments of upper and lower limbs

Question 1

what nerve innervates the anterior arm

Answer 1

musculocutaneous nerve

Question 2

what nerve innervates the anterior forearm

Answer 2

medial nerve innervates all but flexor carpi ulnaris and half of flexor digitorum profundus, which are innervated by the ulnar nerve

Question 3

what nerve innervates the posterior arm and forearm

Answer 3

radial nerve

Question 4

what nerve innervates the anterior thigh

Answer 4

femoral nerve

Question 5

what nerve innervates the posterior thigh

Answer 5

sciatic nerve

Question 6

what nerve innervates the medial thigh

Answer 6

obturator nerve

Question 7

what nerve innervates the anterior leg

Answer 7

fibular nerve

Question 8

what nerve innervates the lateral leg

Answer 8

fibular nerve

Question 9

what nerve innervates the posterior leg

Answer 9

tibial nerve

Question 10

what type of nerve runs through the anterior grey horn of the spinal cord?

Answer 10

efferent (motor) neurons

Question 11

what type of nerve runs through the posterior grey horn of the spinal cord?

Answer 11

afferent (sensory) neurons

Question 12

what type of nerve runs through the lateral grey horn of the spinal cord?

Answer 12

efferent (motor) neurons

Question 13

are efferent neurons motor or sensory

Answer 13

motor

Question 14

are afferent neurons motor or sensory

Answer 14

sensory

Question 15

what are the input roots of the brachial plexus

Answer 15

C5 - C8 and T1

Question 16

what are the final outputs of the brachial plexus

Answer 16

musculocutaneous, radial, axillary, median, ulnar

Question 17

what cell myelinates the PNS

Answer 17

schwann cell

Question 18

what cell myelinates the CNS

Answer 18

oligodendrocytes

Question 19

what is the function of schwann cells

Answer 19

myelinate PNS by wrapping around axon to increase speed of neural transmission

Question 20

what is the function of oligodendrocytes

Answer 20

myelinate CNS by wrapping around several neurons to increase speed of neural transmission

Question 21

what are actrocytes and what are their function

Answer 21

branched glial cells that provide a barrier between nervous tissue and the blood. they stimulate capillaries in the brain to form the BBB, they feed the neurons, release nerve growth factors, play role in synaptic transmission, and form scar tissue when neurons are damaged. they also inhibit some meds from reaching brain

Question 22

what are microglia and what is their function

Answer 22

small phagocytic glial cells that digest foreign particles that invade the nervous tissue and remove dead or damaged neurons. also actively sample brain tissue for damage or inflection in resting phase.

Question 23

what are the function of ependymal cells

Answer 23

line the spaces of brain and spinal cord and secrete and circulate cerebrospinal fluid

Question 24

what vertebra constitute the cervical plexus

Answer 24

C1-5

Question 25

what vertebra constitute the brachial plexus

Answer 25

C5-T1

Question 26

what vertebra constitute the lumbar plexus

Answer 26

L1-4

Question 27

what vertebra constitute the sacral plexus

Answer 27

L4-S4

Question 28

how many pairs of cervicle nerve are there

Answer 28

8 pairs

Question 29

how many pair of thoracic nerves

Answer 29

12 pairs

Question 30

how many pairs of lumbar nerves

Answer 30

5 pairs

Question 31

how many pairs of sacral nerves

Answer 31

5 pairs

Question 32

how many pairs of coccygeal nerve

Answer 32

1 pair

Question 33

where is the lumbar enlargement

Answer 33

at T10 (3 away frm bottom of thoracic nerves)

Question 34

where is the cervical enlargement

Answer 34

at C5, end of cervical plexus

Question 35

where is the medullary cone

Answer 35

T12, end of lumbar nerves

Question 36

where is the cauda equina

Answer 36

L4, near end of lumbar nerves