Ribeye steaks are mostly composed of the longissimus
dorsi muscle but also contain the complexus and spinalis muscles.
The longissimus dorsi is also referred to as the "eye of the ribeye".
The spinalis is also referred to as the "ribeye cap" and the complexus
is a small muscle at the front of the ribeye which may be trimmed off by
the butcher.[1]It is both flavoursome and tender, coming from the
lightly worked upper rib cage area which spans from the sixth to twelfth
ribs of the cattle.[2] Its marbling of fat makes it very good for fast
and hot cooking.