Clinical Implications caused by the agenesis of the RectusAbdominal Muscle’s (MRA) inferior venter

The rectus abdominal muscle is part of the anterior abdominal wall, having three to six bellies. In only oneof the 106 dissections already made in the “Faculdade de Ciências Médicas de Minas Gerais” AnatomyLaboratory was found a male cadaver who did not have inferior venter of this muscle bilaterally. Instead, at theleft side, was found a tendon that measured 5.5 cm laterally and 12 cm medially, and at the right side, therewas the same variation with a 15.5 cm length tendon, rising in the upper branch of the pubis and crest pubis.Despite being a rare variation, individuals who have showed it have increased potential for physiological andsurgical complications, in case they need interventions using inferior rectus abdominis muscle venter’s snips.

Study on anatomical basis of skin flaps based on the blood supply of the rectus abdominis muscle

The investigation was performed in 20 cadavers (dissection in 17 formaldehyde preserved and dye injection in 3 fresh ones). The results of study showed that: average, each rectus abdominal muscle has 4.97 vessel with 0.5-0.6 mm in diameter arising from the anterior gone up through the sheath of abdominal muscle. Among them, 4.56 arising from the deep inferior epigastric artery (DIEA) and they concentrate mainly in the paraumbilical area (87.7%). The cutaneous blood supply (dye coloured area) of the DIEA was 19.5 x 14 cm in the supra and infra umbilical regions. The DIEA and the vein form a suitable pedicle for free tissue transfer. The design of different skin flaps patterns was proposed by results.