sensory components of the spinal nerve

general somatic afferent (GSA)

general visceral afferent (GVA)

接收體表、肌肉、肌腱、關節的感覺訊息

接收內臟的感覺訊息

exteroceptive(體表)

proprioceptive GSA (肌肉、肌腱、關節)

exteroceptive GSA-1

exteroceptive GSA-2

mechanical, thermal, chemical刺激

Aδ和C fiber傳遞 (慢)

lateral division of the posterior root

posterolateral tract (tract of Lissauer)

laminae I到V

discriminative touch, vibratory刺激

Aβ fiber傳遞 (快)

medial division of the posterior root

posterior funiculus

stretch, pressure, vibration的刺激

傳導快

medial division of the posterior root

posterior funiculus

傳遞慢

splanchnic nerve sympathetic chain & white communicating ramus

lateral division of the posterior root

laminae I & V-VII