The dorsolateral tract (Lissauer tract) is a thin bundle of white matter at the tip of the dorsal horn. Incoming pain and temperature fibres travel up or down one or two segments in it before entering the dorsal horn.
| Location | Between the tip of the dorsal horn and the surface of the cord, at the dorsal root entry zone |
|---|---|
| Parts |
|
| Connections |
|
| Blood Supply | Posterior spinal arteries |
Distributes pain and temperature input over neighbouring segments.
Explains why sensory loss from a cord lesion begins a segment or two below the level of damage. The dorsal root entry zone is a surgical target (DREZ lesioning) for some severe nerve root avulsion pain.
Severe pain after root avulsion that can be treated by dorsal root entry zone lesioning.
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