The lateral spinothalamic tract (or lateral spinothalamic fasciculus), which is a part of the Anterolateral system, is a bundle of sensory axons ascending through the white matter of the spinal cord, carrying sensory information to the brain. It carries pain and temperature sensory information to the thalamus of the brain. It is composed primarily of fast-conducting, sparsely-myelinated Aδ axons and slow-conducting, unmyelinated C axons. These are secondary sensory neurons which have already synapsed with the primary sensory neurons of the peripheral nervous system in the dorsal horn of the spinal grey matter.
Together with the anterior, or ventral spinothalamic tract, the lateral spinothalamic tract is sometimes termed the secondary sensory fasciculus or spinal lemniscus.
Read more about Lateral Spinothalamic Tract: Anatomy, Function
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