Ventral Posterior Nucleus (VPN)

A major sensory relay nucleus in the thalamus, receiving somatosensory information (touch, temperature, pain, proprioception) from the body and face.

Key Functions:

• Relays somatosensory information to the primary somatosensory cortex.
• Processes touch, temperature, pain, and proprioception.
• Comprises the ventral posterior lateral (VPL) and ventral posterior medial (VPM) nuclei.

Interacting Systems & Components:

• Thalamus (part of)
• Primary Somatosensory Area (projects to)
• Spinal Cord (receives ascending sensory tracts from)
• Trigeminal Nuclei (receives facial sensory input from)