Porterhouse steak and its anatomic correlation

Porterhouse steak is composed of the Erector spinae muscles and the Psoas muscle. In other words, it is a KC or NY Strip combined with a large Filet mignon.

It is differentiated from the T-bone steak by being cut from a lower section which has a larger filet mignon (Psoas).

The Erector spinae (strip portion of the steak) can be subdivided into 3 separate muscles-

Iliocostalis muscle- Most lateral
Longissimus muscle
Spinalis muscle- Closest to the spine/ spinous process and most medial.


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