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Part 1 Boards Spinal > Tracts > Flashcards

Flashcards in Tracts Deck (33):
1

function pain and temp

lateral spinothalamic

2

function unconscious proprioception

posterior and anterior spinocerebellar

3

function discriminative touch (2 pt), vibration and conscious proprioception

dorsal columns (fasciculus cuneatus and gracilis)

4

function spino visual reflexes; aka spino-quadrigeminal system of Mott

spinotectal

5

function levels of conciousness

spinoreticular

6

function protopathic is defensive to pain, temp, crude light touch

anterior spinothalamic

7

ascending tracts (7)

lateral spinothalamic, anterior spinothalamic, dorsal columns (fasciculus cuneatus and gracilis), posterior and anterior spinocerebellar, spinotectal, spinoreticular

8

lateral spinothalamic pathway (3)

1st DRG
2nd substantia gelatinosa
3rd posterior lateral nucleus of thalamus --> postcentral gyrus

9

anterior spinothalamic pathway (3)

1st DRG
2nd substantia gelatinosa
3rd posterior lateral nucleus of thalamus --> postcentral gyrus

10

dorsal columns pathway (3)

1st DRG
2nd nuclei gracilis/cuneatus
3rd posterior lateral nucleus of thalamus --> postcentral gyrus

11

posterior spinocerebellar pathway (2)

1st DRG
2nd nucleus dorsalis (clarks column) ascend through inferior cerebellar peduncle to cerebellum

12

anterior spinocerebellar (2)

1st DRG
2nd nucleus dorsalis (clarks column) cross segmentally and ascend through superior cerebellar peduncle to cerebellum

13

spinotectal

1st DRG
2nd cross segmentally and ascend to superior colliculus (midbrain)

14

spinoreticular

1st DRG
2nd ascend to nuclei of reticular formation (brainstem)

15

fxn: precise and skilled voluntary movement "threading a needle or writing"

corticospinal (pyramidal) lateral and anterior

16

corticospinal (pyramidal) lateral and anterior origin and destination

o: 1st motor cortex, 2nd motor cortex, parietal lobe
d: internuncial neurons or alpha motor neurons

17

most cross at decussation of pyramids and descend as lateral corticospinal tracts, some continue as anterior corticospinal tracts

lateral corticospinal (length of cord) anterior (stops mid thoracic)

18

fxn: inhibit or facilitate voluntary movement

reticulospinal (pontine and medullary)

19

reticulospinal (pontine and medullary) origin and destination; crosses at various locations

o: reticular formation d: alpha and gamma motor neurons; cross at various locations

20

fxn: reflex postural movement to visual stimuli

tectospinal

21

tectospinal origin and destination

o: superior colliculus (midbrain) EYE d: alpha and gamma motor neuron EAR

22

fxn: facilitates flexors and inhibits extensors; received cerebellar and cerebral information

rubrospinal "red"

23

rubrospinal origin and destination

o: red nucleus (midbrain) d: alpha and gamma motor neurons

24

fxn: facilitates extensors and inhibits flexors; receives inner ear (via vestibular nerve) and cerebellar info

vestibulopinal

25

vestibulospinal origin and destination

o: lateral vestibular nucleus d: alpha and gamma motor neurons

26

+ path reflexes (babinski)

UMNL

27

increased muscle tone, spasticity, hypertrophy, clonus

UMNL

28

increased deep tendon reflex

UMNL

29

decreased superficial reflexes (bilateral)

UMNL

30

no path reflexes

LMNL

31

flaccidity, atrophy, fasciculations

LMNL

32

decreased deep tendon reflex

LMNL

33

decreased superficial reflexes (unilateral)

LMNL