Quiz 5

Question 1

CSF Flow

Answer 1

lateral ventricles –> foramen of monro–> 3rd ventricle –> cerebral aqueduct (of sylvius) –> 4th ventricle –> foramen of Luschka and Magendie –> subarachnoid space –> arachnoid villi (venous drainage)

Question 2

Mnemonic for CSF Flow

Answer 2

Lady Monro’s 3 Siblings Fought for Magical Lights Seeing Arrogant Seniors

Question 3

Components of CSF

Answer 3

sodium, chloride, magnesium, potassium, calcium, bicarb, glucose

Question 4

Which concentrations are greater in CSF than plasma?

Answer 4

sodium, chloride, magnesium

Question 5

Which concentrations are lower in CSF than plasma?

Answer 5

potassium, calcium, bicarbonate, glucose

Question 6

Specific gravity and pH of CSF

Answer 6

1.002-1.009 and 7.32

Question 7

What produces CSF?

Answer 7

ependymal cells of choroid plexus

Question 8

What absorbs CSF?

Answer 8

arachnoid villi

Question 9

Brachial plexus roots

Answer 9

C5-8, T1

Question 10

Brachial plexus trunks

Answer 10

superior, middle, inferior

Question 11

Terminal branches of brachial plexus

Answer 11

musculocutaneous nerve (C5-7)
axillary nerve (C5-6)
radial nerve (C5-T1)
median nerve (C5-T1)
ulnar nerve (C7-T1)

Question 12

Transduction

Answer 12

process by which noxious stimulus converted to electrical impulse in sensory nerve endings

Question 13

Transmission

Answer 13

conduction of electrical impulses to CNS with major connections being in dorsal horn of SC and thalamus with projections to cingulate, insular, somatosensory cortexes

Question 14

Modulation

Answer 14

process of altering pain transmission- both inhibitory and excitatory mechanisms modulate pain (nociceptive) impulse transmission in PNS and CNS

Question 15

Perception

Answer 15

occurs at thalamus with cortex being important for discrimination of specific sensory experiences