General somatic afferent

The GSA fibres carry general sensations (pain, touch and temperature from skin) and proprioceptive sensations (vibration, muscle and joint sense) to the nuclei of GSA column.

GSA nuclei include the three sensory nuclei of the trigeminal nerve.

N.B. Out of the three sensory nuclei of the trigeminal nerve, the chief sensory nucleus is mainly responsible for sense of touch, the spinal nucleus for sense of pain and temperature, and mesencephalic nucleus for sense of proprioception.