Ascending somatic sensory pathways to the cerebral cortex consist of thousands of sets of three neurons: first-order neurons, second-order neurons, and third-order neurons.

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Ascending somatic sensory pathways indeed consist of three types of neurons in sequence: first-order neurons that receive sensory information and transmit it to the spinal cord or brainstem, second-order neurons that relay the information to the thalamus, and third-order neurons that convey the information from the thalamus to the cerebral cortex for processing.

Ascending Somatic Sensory Pathways to the Cerebral Cortex Consist of Thousands