The psychic pneuma in the middle ventricle of the brain is the medium of judgement, assent, dissent, and impulse. Nemesius does not describe the details of the operations of this thinking faculty (dianoe ¯ tikon), which is also the source of voluntary bodily movements through the nerves going from its organ to the muscles (chs. 12 and 27). The cognitive contents of the faculties of sense and thought are deposited in the memory, which is located in the posterior ventricle of the brain (ch. 13): So, then, the faculty of imagination transmits to the faculty of thinking the appearances, while the faculty of thinking or reasoning receives them, passes judgement on them, and transmits them on to the faculty of memory. (13, 69.16–18