TRACTS

Question 1

which tract is for PROPRIOCEPTION and FINE TOUCH & VIBRATION, 2 POINT TOUCH, STRETCH

Answer 1

DORSAL (POSTERIOR) COLUMN MEDIAL LEMNISCUS

Question 2

where do DORSAL COLUMN MEDIAL LEMNISCUS pathway fibres DECUSSATE

Answer 2

in the MEDULLA

Question 3

DORSAL COLUMN MEDIAL LEMNISCUS
pathway going from Receptors in the skin to where (through what)

Answer 3

through Ventral Posterolateral Nucleus of Thalamus (synapses)

to PRIMARY SOMATOSENSORY CORTEX in POST-CENTRAL GYRUS

Question 4

DORSAL COLUMN MEDIAL LEMNISCUS
- travels via FASCICULS CUTANEOUS and synapses at Nucleus Cutaneous at which level

• travels via FASCICULUS GRACILIS and synapses at Nucleus Gracilis at which level

Answer 4

FC - ABOVE T6

FG - BELOW T6

Question 5

which pathway has 2 DECUSSATIONS therefore making innervation IPSILATERAL

Answer 5

SPINOCEREBELLAR Tract

Question 6

DORSAL COLUMN MEDIAL LEMNISCUS
1ST ORDER NEURONES collect where before entering spinalcord at FC or FG

Answer 6

in DRG

Question 7

DORSAL COLUMN MEDIAL LEMNISCUS
join onto 2ND ORDER NEURONES where

Answer 7

MEDULLA

-> DECUSSATE

Question 8

DORSAL COLUMN MEDIAL LEMNISCUS
3RD ORDER NEURONES where

Answer 8

INTERNAL CAPSULE in POST-CENTRAL GYRUS

Question 9

fast pain and temperature / noxious mechanical stimuli via which fibre

Answer 9

A - DELTA

Question 10

cutaneous receptors for non-noxious mechanical stimuli via which fibre

Answer 10

A - BETA

Question 11

slow pain and temperature / noxious heat and chemical stimuli via which fibre

Answer 11

C

Question 12

which tract is for PAIN & TEMPERATURE

Answer 12

LATERAL SPINOTHALAMIC Tract

Question 13

which tract is for CRUDE TOUCH (cannot localise site) and PRESSURE

Answer 13

ANTERIOR / VENTRAL SPINOTHALAMIC Tract

Question 14

SPINOTHALAMIC PATHWAY comes from which skin RECEPTORS

Answer 14

MERKEL DISCS
FREE NERVE ENDINGS

Question 15

SPINOTHALAMIC PATHWAY uses which FIBRES

Answer 15

A - DELTA (fast pain)
C (slow pain)

Question 16

SPINOTHALAMIC PATHWAY goes from skin receptors through the … (synapses) to where

Answer 16

through Ventral Posterolateral nucleus of Thalamus

to PRIMARY SOMATOSENSORY CORTEX in POST-CENTRAL GYRUS

Question 17

SPINOTHALAMIC Pathway DECCUSATES where

Answer 17

in the ANTERIOR WHITE COMMISSURE at the level of the Spinal Cord where it enters

Question 18

SPINOTHALAMIC pathway
1st Order Neurones:

Answer 18

in DRG

Question 19

SPINOTHALAMIC pathway
2ND ORDER NEURONES:

Answer 19

ANTERIOR WHITE COMMISSURE at the same level of the spinal cord where it enters
- after decussating

Question 20

SPINOTHALAMIC pathway
3RD ORDER NEURONES where:

Answer 20

in THALAMUS - VENTRAL POSTEROLATERAL NUCLEUS

Question 21

CORTICOSPINAL Tract
starts where and ends where

Answer 21

from PRIMARY MOTOR CORTEX in PRE-CENTRAL GYRUS
to
SPINAL CORD
(-> muscle)

Question 22

CORTICOSPINAL Tract made up of which cells

Answer 22

PYRAMIDAL CELLS - LAYER V (Int. Pyramidal)

Question 23

CORTICOSPINAL Tract
DECUSSATES where

Answer 23

90% Decussates in MEDULLA
(Pyramids - anterior)

10% remains IPSILATERAL but will decussate at spinal cord

Question 24

CORTICOSPINAL Tract
90% that DECUSSATES at MEDULLA forms which pathway and what does it innervate

Answer 24

LATERAL CORTICOSPINAL tract

-> innervates DISTAL MUSCLES
ie hands,feet

Question 25

CORTICOSPINAL Tract 10% that remains IPSILATERAL will form which pathway and what does it innervate

Answer 25

ANTERIOR CORTICOSPINAL Tract -> innervates PROXIMAL MUSCLES ie in trunk

Question 26

pathway of CORTICOSPINAL Tract from motor cortex to medulla

Answer 26

- INTERNAL CAPSULE - Midbrain : SUPERIOR PEDUNCLE - Medulla : anterior PYRAMIDS (decussates)

Question 27

which pathway is UNCONSCIOUS

Answer 27

SPINOCEREBELLAR TRACT

Question 28

SPINOCEREBELLAR Tract is for..

Answer 28

PROPRIOCEPTION, TOUCH, PRESSURE, COORDINATION, Posture

Question 29

which Skin RECEPTORS are used in SPINOCEREBELLAR Tract

Answer 29

- MEISSNER'S CORPUSCLE - PASCINIAN CORPUSCLE - RUFFINI CORPUSLE

Question 30

SPINOCEREBELLAR Tract where are the 2 DECUSSATIONS

Answer 30

1st: SPINAL CORD - VENTRAL WHITE 2nd: CEREBELLUM Ventral tract (below L2) : SUPERIOR PEDUNCLE Dorsal (C8-L2) or cuneocerebellar (above C8) : Inferior Peduncle

Question 31

SPINOCEREBELLAR Tract where are the 1ST ORDER NEURONS

Answer 31

DRG

Question 32

SPINOCEREBELLAR Tract where are the 2ND ORDER NEURONS

Answer 32

SPINAL CORD - Lateral White (after decussating)

Question 33

which Tract comes from MERKELS DISCS and FREE NERVE ENDINGS

Answer 33

SPINOTHALAMIC - Pain, Temperature, Pressure, Crude Touch

Question 34

DORSAL COLUMN MEDIAL LEMNISCUS is for what

Answer 34

Sensory Ascending Conscious PROPRIOCEPTION, FINE TOUCH, VIBRATION

Question 35

SPINOTHALAMIC is for what

Answer 35

Sensory Ascending Conscious PAIN, TEMP, CRUDE TOUCH, PRESSURE

Question 36

SPINOCEREBELLAR is for what

Answer 36

Sensory Ascending Unconcious PROPRIOCEPTION, TOUCH, PRESSURE, COORDINATION, POSTURE

Question 37

CORTICOSPINAL is for what

Answer 37

Motor Descending Conscious VOLUNTARY MOVEMENT

Question 38

which tract(s) DECUSSATES at MEDULLA

Answer 38

- DORSAL COLUMN MEDIAL LEMNISCUS - LATERAL CORTICOSPINAL (90%)

Question 39

which tract(s) DECUSSATES in SPINAL CORD

Answer 39

- SPINOTHALAMIC - SPINOCEREBELLAR 1ST Decussation - CORTICOSPINAL - last 10%

Question 40

which tract innervation is IPSILATERAL

Answer 40

SPINOCEREBELLAR (2 decussations)

Question 41

which tract is for PAIN

Answer 41

LATERAL SPINOTHALAMIC

Question 42

which tract uses FASCICULUS CUNEATUS and GRACILIS

Answer 42

DORSAL COLUMN MEDIAL LEMNISCUS