SC

Question 1

where does the PCML cross over

Answer 1

medulla (to medial leminiscus)

Question 2

Sensory ataxia

Answer 2

• Movement disorder associated with sensory impairment – not enough feedback coming back to brain to tell brain if motor signals sending out are correct
  o Broad-based gait, gaze directed to feet (aid from visual system)
  o Stamping action to max. conscious proprioception

Question 3

Anterior STT

Answer 3

crude touch, pressure and vibration

Question 4

Lateral STT

Answer 4

pain and temp sensations

Question 5

Cervical dermatome

Answer 5

hand, arm, shoulder, neck

Question 6

thoracic dermatome

Answer 6

abdominal, thoracic, trunk

Question 7

lumbar dermatome

Answer 7

hips, thighs, feet, legs

Question 8

sacral dermatome

Answer 8

part of legs (lateral) and genitals

Question 9

white matter fnxn in SC

Answer 9

tracts propogate sensory impulses from receptors to brain, motor impulses from brain effectors

Question 10

gray matter function

Answer 10

receives and integrates incoming/outgoing info

a log of reflexes happen at level of SC because of relays which happen in gray matter

Question 11

posterior gray horn

Answer 11

sensory info

Question 12

lateral gray horm

Answer 12

ANS, only exists at sc level which elicits sympathetic information

Question 13

anterior gray horn

Answer 13

motor information

Question 14

endoneurium

Answer 14

around each indv axon

Question 15

perineurium

Answer 15

surrounds a fasicle (collection) of axons

Question 16

epineurium

Answer 16

surrounding a collection of fasciles

Question 17

PNS regeneration

Answer 17

often vigorous and complete and promote by SCHWANN CELLS

Question 18

CNS

Answer 18

regeneration is uncommon and never complete

inhibited by oligo dendrocytes which secrete an inhibitory factor (glial scarring)

Question 19

F. Cuneatus

Answer 19

more lateral and going to provide somatosensoryinfo for upper limbs

Question 20

F. gracillis

Answer 20

more medial and going to provide info from the somatorsensory part of lower limbs

Question 21

where does info cross over from PCML

Answer 21

at medulla n. cuneatus or n. gracillis and becomes medial leminiscus

Question 22

function of PCML

Answer 22

• discriminitive touch
• concious proprioception
• provide image and body location

Question 23

sensory ataxia

Answer 23

broad based gait, gaze directed at feet, stomping action to max concious proprioception

Question 24

tests to test for sensory ataxia

Answer 24

rombergs sign

finger to nose

Question 25

anterior STT

Answer 25

crude touch and pressure and vibrations

Question 26

lateral STT

Answer 26

pain and temp sensations

Question 27

UMN

Answer 27

regulate planning and initiation of movements

cortex or other brain areas

Question 28

LMN

Answer 28

innervates skeletal muscles of the Body
cel l bodies in brain stem or SC
final neuron in pathway

Question 29

lateral corticospinal tract

Answer 29

80-90% decussation at pyramids

Question 30

anterior corticospinal tract

Answer 30

10% decussation at cervical or thoracic levels