There are how many neurons that form a chain, or pathway, to relay sensory information from the sensory receptor to the somatosensory cortex of the cerebral cortex?

There are three neurons that form a chain or pathway to relay sensory information from the sensory receptor to the somatosensory cortex of the cerebral cortex. These neurons are the primary sensory neuron, the secondary sensory neuron, and the tertiary sensory neuron.