Published online by Cambridge University Press: 22 November 2024
Unlike the motor fibers of the corticospinal tract and the vibratory/proprioceptive fibers of the dorsal columns, the small pain/temperature fibers of the spinothalamic tract (STT) do not decussate within the medulla, but rather within the body of the spinal cord itself. Fibers carrying pain and temperature sensation are small and unmyelinated. These transmit signals via the pseudounipolar neurons in the dorsal root ganglia into the dorsal horn of the spinal cord. Most of the fibers synapse in the dorsal gray matter of the spinal cord (substantia gelatinosa).
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