Tracts Flashcards Preview

Part 1 Boards Spinal > Tracts > Flashcards

Flashcards in Tracts Deck (33)
Loading flashcards...
1
Q

function pain and temp

A

lateral spinothalamic

2
Q

function unconscious proprioception

A

posterior and anterior spinocerebellar

3
Q

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

A

dorsal columns (fasciculus cuneatus and gracilis)

4
Q

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

A

spinotectal

5
Q

function levels of conciousness

A

spinoreticular

6
Q

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

A

anterior spinothalamic

7
Q

ascending tracts (7)

A

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

8
Q

lateral spinothalamic pathway (3)

A

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

9
Q

anterior spinothalamic pathway (3)

A

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

10
Q

dorsal columns pathway (3)

A

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

11
Q

posterior spinocerebellar pathway (2)

A

1st DRG

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

12
Q

anterior spinocerebellar (2)

A

1st DRG

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

13
Q

spinotectal

A

1st DRG

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

14
Q

spinoreticular

A

1st DRG

2nd ascend to nuclei of reticular formation (brainstem)

15
Q

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

A

corticospinal (pyramidal) lateral and anterior

16
Q

corticospinal (pyramidal) lateral and anterior origin and destination

A

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

17
Q

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

A

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

18
Q

fxn: inhibit or facilitate voluntary movement

A

reticulospinal (pontine and medullary)

19
Q

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

A

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

20
Q

fxn: reflex postural movement to visual stimuli

A

tectospinal

21
Q

tectospinal origin and destination

A

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

22
Q

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

A

rubrospinal “red”

23
Q

rubrospinal origin and destination

A

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

24
Q

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

A

vestibulopinal

25
Q

vestibulospinal origin and destination

A

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

26
Q

+ path reflexes (babinski)

A

UMNL

27
Q

increased muscle tone, spasticity, hypertrophy, clonus

A

UMNL

28
Q

increased deep tendon reflex

A

UMNL

29
Q

decreased superficial reflexes (bilateral)

A

UMNL

30
Q

no path reflexes

A

LMNL

31
Q

flaccidity, atrophy, fasciculations

A

LMNL

32
Q

decreased deep tendon reflex

A

LMNL

33
Q

decreased superficial reflexes (unilateral)

A

LMNL