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.
Cat pica may be caused by many things, including: 1  Dietary deficiencies: Some cats will eat their cat litter if theyâre anemic, Plotnick says.  2 Iâve had two cases of cats with anemia, and that was one of the signs..