Ascending Tracts

Question 0

Anterior Spinothalamic

Answer 0

Crude touch and pressure
May ascend several segments before decussating
Second order neurones synapse in thalamus
Third order terminate at somatosensory cortex

Question 1

Dorsal column medial lemniscus

Answer 1

Fine touch, vibration, proprioception
Two tracts - fasciculus gracilis and cuneatus
Second order neurones decussate at medulla and terminate at the thalamus
Third order project into somatosensory cortex

Question 2

Lateral Spinothalamic

Answer 2

Pain and temperature
Decussate immediately
Second order neurones synapse in thalamus
Third order terminate at somatosensory cortex

Question 3

Unconscious tracts

Answer 3

All carry proprioception
No third order neurones
Terminate in cerebellar cortex

Question 4

Anterior spinocerebellar

Answer 4

Decussates twice

Question 5

Posterior spinocerebellar

Answer 5

Remains ipsilateral

Question 6

Cuneocerebellar

Answer 6

remains ipsilateral