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 External Oblique Muscle (pp. 132-3). 1  This is the largest and most superficial of the three flat abdominal muscles. 2  It is located in the anterolateral aspect of the abdominal wall. 3  Its fleshy part forms the anterolateral portion and its aponeurosis forms the anterior part.osterior Abdominal Wall. 1  The posterior abdominal wall is composed principally of muscles and fascia attached to the vertebrae, hip bones, and ribs. 2  It also contains fat, important nerves, vessels, and lymph nodes.