Non-invasive Measurement of Gastric Motility

Inclusion Criteria: * Age 22 years old or older * Able to provide written informed consent * Patients with a suspected motility disorder, meetingRome IVCriteria for functional dyspepsia or chronic nausea and vomiting syndromes or having a diagnosis of gastroparesis as confirmed by a standardized gastric scintigraphy study, including having \>10% gastric meal retention at 4-hours. Exclusion Criteria: * BMI \>35 kg m(2) * Known metabolic, neurogenic or endocrine disorders known to cause gastrointestinal dysmotility e.g. multiple sclerosis, Parkinson's disease, hypothyroidism * Known current gastrointestinal infection (includes H.pylori when being actively treated) * Known current inflammatory bowel disease * Known current gastrointestinal malignancy * Previous gastroduodenal surgery * Open abdominal wounds or abdominal skin not intact (e.g.rash, abrasions, weeping tissues) * Fragile skin evidenced by high susceptibility to skin tears or skin that bruises easily * Regular cannabis use * Allergy to adhesives * Pregnancy