A colonic motility/scintigraphic transit study measures pressures of the colon before and after you eat. These measurements will provide information on how your colon is working. The most common uses for the test are:

• To see if constipation is caused by neuropathy (problem with the nerves) or myopathy (weakness of the muscles)
• Before a colon removal is done for constipation

You should consult with the physician who is ordering the study to learn what you should do or not do before your procedure.