Constipation can last from days to months, with interludes of diarrhea or normal bowel function. Stools are often hard and may be described as pellet shaped in at least 25% of bowel movements, or Bristol Stool Form Scale 1-2 (separate hard lumps like nuts that are difficult to pass, or sausage shaped but lumpy).
The external abdominal oblique muscle is the largest and most superficial of the 3 paired, flat abdominal muscles. It arises from the lower 8 ribs and interdigitations of the serratus anterior muscle.
The muscles of the abdomen are layered from deep to superficial including the transverse abdominis (fibers run across the abdomen), internal and external obliques (fibers run in opposite diagonal directions), and rectus abdominis (fibers run up and down).he muscles of the abdomen are layered from deep to superficial including the transverse abdominis (fibers run across the abdomen), internal and external obliques (fibers run in opposite diagonal directions), and rectus abdominis (fibers run up and down).