Objective methods for evaluating anorectal function include anorectal manometry, anal electromyography, and defecography. These are useful for diagnosing defecation disorders such as fecal incontinenceFecal incontinence and constipation, as well as for assessing function after treatment. Anorectal manometry primarily measures sphincter function, including resting pressure (the contraction capacity of the internal anal sphincter for the most part), voluntary contraction pressure (the contraction capacity of the external anal sphincter), the recto-anal inhibitory reflexRecto-anal inhibitory reflex [1], and the cough reflexCough reflex. Additionally, rectal reservoir function is assessed by inserting and retaining a balloon within the rectum, inflating it with air to expand it, and measuring the volume that induces the urge to defecate and the maximum tolerable volume. The equipment used for inspection is expensive, and particularly, the strain gauge transducer probes require careful handling. Furthermore, calibrating the equipment according to the manufacturer’s recommendations prior to inspection is crucial for accurate measurements, necessitating the acquisition of measurement techniques. However, the current situation lacks uniformity regarding the equipment used for inspection, the implementation methods, and the interpretation of results. This section describes the equipment used for inspection, the inspection methods and parameters, and the evaluation process.