ventral posterolateral nucleus of the thalamus
thalamus
in the thalamus

The second-order neuron of the spinothalamic system terminates in the thalamus, specifically the ventral posterolateral nucleus. From here, the information is relayed to the somatosensory cortex for further processing and perception of pain and temperature.

Ventral-lateral is a medical term that refers to the geniculate nucleus, which is a thalamus nucleus. The term means affecting or pertaining to the front and side.

A barreloid is a structure in the ventral posterior medial nucleus of the thalamus within the brain of a mouse.

The anterolateral walls are at the front and sides. The posterolateral walls are at the back and sides.