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. Short bowel syndrome in adults is usually caused by: 1  Crohn's disease, an inflammatory disorder of the digestive tract. 2  Volvulus, a spontaneous twisting of the small intestine that cuts off the blood supply and leads to necrosis or tissue death. 3  Cancer of the small intestine.hort bowel syndrome caused by the surgical removal of a portion of the bowel may be a temporary condition, due to the adaptive property of the small intestine. In a process called intestinal adaptation, physiological changes to the remaining portion of the small intestine occur to increase its absorptive capacity.