Transversus Abdominis Plane Block: An Updated Review of Anatomy and Techniques

Figure 1

The thoracolumbar spinal nerves (T6~L1) innervating the anterolateral abdominal wall. (a) Distribution of neurovascular structure in the anterolateral abdominal wall. (b) The pathway of the thoracolumbar spinal nerves (T12). This is the cross-sectional view of the left abdomen. The anterior primary ramus of the segmental nerves divides into anterior and lateral cutaneous branches, which supply the anterolateral abdominal wall. (c) The segmental distribution of cutaneous nerve on the anterolateral trunk.

(a)

(b)

(c)