 (ii) Another type of movement is that produced by previously present objects. To explain this type Pereira turned to internal senses, which he defined as inner cognitive organic faculties. He said that, while there are two internal senses in man, imagination and memory, in animals only memory is present. Pereira then developed a mechanical way of processing information in animal memory which excluded mental activity. According to him, when an object disappears it leaves a phantasma. These phantasmata or traces are stored in a cell located in the posterior zone of the brain, remaining there in a passive state. In the absence of the object, those phantasmata can be activated and move from the cell to the synciput which is located in the anterior zone of the brain. There they produce the same reactions provoked by the species coming from present objects. The author said that the only difference between humans and animals with respect to the function of memory is that man can voluntarily cause the movement of the memory traces to evoke a recall, whereas in animals this movement is due to purely mechanical stimuli which can come from internal or external origin (AM: I.251, I.253–255, I.263–265).