How is transversalis fascia different from transversus abdominis fascia?
Every muscle layer has a layer of fascia covering it. Transversus abdominis fascia is simply the fascia coving the transversus abdominis muscle. It is important to note that transversalis fascia is the intrabdominal fascia that takes on the name of the muscle where ever it is. Anteriorly, since it is adjacent to transversus abdominis it is called transversalis fascia. This fascia is always posterior to the rectus abdominis, while the transversus abdominis fascia becomes anteriorly in the inferior portion of the rectus abdominis as it joins the internal abdominis aponorouses (to form the conjoint tendon)