Anterolateral system - definition
refers to a collection of ascending pathways that carry pain and temperature--as well as related touch--sensations from the spinal cord to the brainstem or thalamus. The anterolateral system is generally considered to contain the spinothalamic tract, spinoreticular tract, and spinomesencephalic tract.
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2-Minute Neuroscience: Pain and the Anterolateral System
The purple lines above show the path of the tracts included in the anterolateral system.