UNCUS By N., Pam M.S. - April 29, 2013 noun. a hook-shaped portion of the rhinal sulcus of the hippocampal formation housed in the rhinencephalonoun. The lateral olaspecty tract is linked to the uncus. UNCUS: "The uncus is severely deformed in the second autopsy." Related Psychology Terms TUFTED CELL RHINAL FISSURE UNCINATE FASCICULUS PRECUNEUS TURBINATE TEMPORAL LOBE ARCUATE ZONE OF THE BRAIN FASCIOLUS GYRUS BULBOTEGMENTAL RETICULAR FORMATION MIDDLE CEREBRAL ARTERY Cite this page: N., Pam M.S., "UNCUS," in PsychologyDictionary.org, April 29, 2013, https://psychologydictionary.org/uncus/ (accessed October 18, 2021).