Functionally, these neurons are either motor (conducting impulses that will cause activity such as the contraction of muscles) or association (conducting impulses and permitting 'communication' between neurons within the central nervous system).
The scant research that has been done on the causes of pica suggests that the disorder is a specific appetite caused by mineral deficiency in many cases, such as iron deficiency, which sometimes is a result of celiac disease or hookworm infection.
Chewing cardboard, amongst other things, can be a sign of pica in cats. Basically, this is an eating disorder that could be a consequence of dietary deficiencies or cognitive dysfunction (old age, senility), and some others.hewing cardboard, amongst other things, can be a sign of pica in cats. Basically, this is an eating disorder that could be a consequence of dietary deficiencies or cognitive dysfunction (old age, senility), and some others.