A modality is the way or mode in which something exists or is done. You might often see it used with reference to diagnostic modality, which is the way in which a disease or illness is diagnosed by a doctor. Modality shares its root with the word mode, meaning the way in which something happens or is experienced.. A sensory modality is a way of sensing, like vision or hearing. Modality in someone's voice gives a sense of the person's mood.
Some of the causes of slow bowel movements, whether clearly defined as constipation or not, includes 1  : Dehydration. 2  Depression. 3  Eating disorders.  Hypothyroidism â underactivity of the thyroid 1  gland. Hemorrhoids.  Inflammatory bowel disease (IBD) â active phases always present with diarrhea.
Causes. Constipation happens when the colon absorbs too much water. This can occur if the muscles in the colon are contracting slowly or poorly, causing the stool to move too slowly and lose more water. These are the most common causes of constipation: 1) Lack of fiber in the diet