semispinalis capitis splenius capitis longismuss capitis spinalis capitis trapezius
erectus spinae
There is a cut of beef/lamb called spinalis dorsi. It also goes by the name of rib eye cap.
The main group of muscles supporting the back are the erector spinae, comprised of the spinalis, longissimus,and iliocostalis.
H. Waibl has written: 'Zur topographie der medulla spinalis der albinoratte (Rattus norvegicus)' -- subject(s): Anatomy, Rats
Three major muscles in the back are the trapezius, latissimus dorsi, and the spinal erectae.
The prime mover for back extension is the Erector Spinae. It consists of three groups ( longissimus, iliocostalis, and spinalis)
There is considerable variation in the extent to which decussation takes place in the medulla oblongata; about two-thirds or three-fourths of the fibers usually decussate in the medulla oblongata and the remainder in the medulla spinalis.
Primarily quadratus lumborum, unilateral contraction of spinalis muscles (you can feel these contract in your lower-mid back on the side to which you're bending against resistance) and, to a lesser extent, oblique muscles.
Pectorals, biceps, masseter, quadriceps, adductor longus, erector spinae, iliocostalis, longissimus, spinalis, latissimus dorsi, transversospinales, rotatores, intertransversarii, pyramidalis, rectus abdominis, iliococcygeus, pubococcygeus, coccygeus and Levator ani.
supraspinatus, infraspinatus, subscapularis, teres minor
Longissimus Spinalis Semispinalis Iliocostalis, a minor role in extension but a major role in lateral bending and twisting of the spine Multifidius, a stabilizer muscle, plays a minor role in back extension