Anterolateral spinothalamic track (pain pathway)

 SENSATION CARRIED 

• crude touch
• pain and temperature 

PATHWAY

First-order neuron 

• receptors enters the spinal cord through the dorsal horn and end in dorsal horn cell 

Second-order neuron 

• arises from dorsal horn 
• crosses to the opposite side in front of the c
  entral canal 
• they occupy the lateral and anterior part 
• they end in the ventral posterolateral nucleus of the thalamus

Third-order neuron 

• arises from the thalamus and ends in the sensory cortex (areas 3,1,2)    

EFFECT OF LESION

• bilateral lesion - causes loss of crude touch in both sides 
• unilateral lesion - loss of crude touch in the opposite side of lesion