Spinal Pathways

Question 1

Sensory information by multi-neuron chains from body up to more rostral regions of CNS

Answer 1

Ascending pathways

Question 2

Examples of Ascending Pathways (3)

Answer 2

Dorsal Column Medial Lemniscus
(Fasciculus gracilis & cuneatus)
Spinothalamic Tracts 
(Lateral and Anterior)
Spinocerebellar Tracts
(Anterior and Posterior)

Question 3

Motor instructions from the brain to more caudal regions of the CNS

Answer 3

Descending Pathways

Question 4

Examples of Descending Pathways (2)

Answer 4

Pyramidal (Corticospinal Tracts, Anterior & Lateral)
Rubrospinal Tract
Reticulospinal Tract
Vestibulospinal Tract
Tectospinal Tract

Question 5

Damage to Motor tracts

Answer 5

Paralysis/Paresis

Question 6

Damage to Sensory tracts

Answer 6

Anesthesia
Parasthesia
Pain

Question 7

What pathway: propioception sense from skeletal muscles to cerebellum of same side

Answer 7

Spinocerebellar Tract

Question 8

Spinocerebellar Tract: decussation

Answer 8

None, it DOES NOT CROSS. DO NOT REACH CONSCIOUSNESS

Question 9

Posterior/Dorsal Column: decussation

Answer 9

Medulla

Question 10

What pathway: discriminative touch/ joint position and vibration sensation through thalamus to somatosensory cortex

Answer 10

Posterior/Dorsal Column

Medial Lemniscus

Question 11

Spinocerebellar Tract: ascends the spinal cord ipsilaterally or contralaterally

Answer 11

Ascends IPSILATERALLY

Question 12

Posterior/Dorsal column: ascends the spinal cord ipsilaterally or contralaterally

Answer 12

Ipsilaterally

Question 13

Dorsal column ascends thalamus: ipsilaterally or contralaterally

Answer 13

Contralaterally

Question 14

What pathway: carries non-discriminative sensations through thalamus to the primary somatosensory cortex

Answer 14

Lateral spinothalamic tract

Question 15

Lateral spinothalamic tract: decussation

Answer 15

Spinal cord

Question 16

Lateral spinothalamic tract: ascend the spinal cord and thalamus _______

Answer 16

Contralateral

Question 17

Collection of axons in the PNS

Answer 17

Nerves

Question 18

Collection of axons in the CNS

Answer 18

Tracts

Question 19

Five Basic modalities of sensation

Answer 19

1. Vibration
2. Joint position (propioception)
3. Light touch
4. Pain (Pinprick)
5. Temperature

Question 20

Modalities of sensation in Posterior Columns

Answer 20

Vibration
Position
Fine Touch

Question 21

Fibre size for Lateral spinothalamic tract

Answer 21

Small fibre

Question 22

Fiber size for posterior column

Answer 22

Large fibre

Question 23

Modalities of sensation for Lateral Spinothalamic Tract

Answer 23

Pain
Temperature
Crude & Light Touch

Question 24

Tract for motor information

Answer 24

Corticospinal tract

Question 25

Tract for sensory information

Answer 25

Spinothalamic tract

Posterior/dorsal column

Question 26

Modality that is usually symptomatic in spinothalamic tract lesion

Answer 26

Pain

Question 27

Point of decussation

Answer 27

2nd order Neuron

Question 28

Sensations that reach the consciousness

Answer 28

Conscious sensations

Question 29

Sensations that do not reach the somatosensory cortex; only until the spinal cord

Answer 29

Reflexes

Question 30

Pain, temperature and light touch point of decussation

Answer 30

Spinal cord (Lateral spinothalamic tract)

Question 31

Joint position, vibration and fine touch decussation

Answer 31

Medulla (Posterior column)

Question 32

Conscious information reaches until where?

Answer 32

Somatosensory cortex

Question 33

Reflexes reach until where?

Answer 33

Spinal cord

Question 34

Type of neuron which establishes neuronal circuit between sensory and motor neurons

Answer 34

Interneurons