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.
Pica: Introduction. Pica: A condition which is characterized by compulsive consumption of foods that contain little nutrition. See detailed information below for a list of 13 causes of Pica, Symptom Checker, including diseases and drug side effect causes. Â» Review Causes of Pica: Causes | Symptom Checker Â».