Mysticism is produced by the combustion of the gray vascular matter in the sensorium—the thalami optici and the corpora striata.
The thalami are of considerable extent, though partially covered by the optic lobes and the posterior lobes of the cerebrum.
1753, "the receptacle of a flower," Modern Latin, from Latin thalamus "inner chamber," from Greek thalamos "inner chamber, bedroom," related to thalame "den, lair," tholos "vault, vaulted building." Used since 1756 of a part of the forebrain where a nerve appears to originate.
thalamus thal·a·mus (thāl'ə-məs)
n. pl. thal·a·mi (-mī')
A large ovoid mass of gray matter that forms the larger dorsal subdivision of the diencephalon and is located medial to the internal capsule and to the body and tail of the caudate nucleus. It functions in the relay of sensory impulses to the cerebral cortex.