Spinothalamic Pain Temperature — FRCA Primary MCQ

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EasyPhysiology - NeurophysiologySpinothalamic Pain TemperatureFRCA Primary

The spinothalamic tract carries which sensory modalities?

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Correct answer: A — Pain and temperature and crude touch

The spinothalamic tract (anterolateral system) carries pain / temperature / and crude touch. First-order neurones synapse in the dorsal horn. Second-order neurones decussate within 1-2 segments and ascend contralaterally. This anatomical arrangement explains contralateral sensory loss below a hemisection of the cord (Brown-Séquard syndrome).

Reference: Power Kam 2018 Principles of Physiology for the Anaesthetist