14781-koppen

162 Chapter 7 120 sec 120 sec 20 mmHg 40 mmHg Descending Colon Sigmoid Colon Descending Colon Sigmoid Colon A. B. FIGURE 3: (A) Typical motor patterns recorded in the constipated children. Note that within the sigmoid colon, there are multiple motor patterns recorded but very few appear to propagate in any direction. In this example 4, long-single propagating motor patterns can be seen. The start of each one is shown by the black arrows. (B) The motor pattern recorded throughout the pre- and postprandial period in child no. 16 (see Table 1). In this child, long-single motor patterns (black arrows) were identified prior to and after the meal at frequency of ~1.2 cpm.