May be obtained by severing the backbone between the 5 th and 6 th ribs, as well as between the, 9 th and 10 th dorsal vertebrae, performing after that a longitudinal cut al0ng the external edge of the ribs. This, cut may be made at a distance of 25, 50 or 75 mm measured from the lateral edge of the ribeye (m. Longissimus dorsi) depending 0n specifications.

The 6th to 9th dorsal vertebrae and spinal end of corresponding ribs.

A superficially level, the m. Trapezius thoracisand the tissimus dorsi can be observed and on a deeper level, the m. Longuissimus dorsi, m. Spinalis dorsi, m. Multifidi dorsi, m. Ilicostalis, m. Intercostalis and m. Levatores costarum.