QUADRATUS LUMBORUM
\kwˈɒdɹatəs lʌmbˈɔːɹəm], \kwˈɒdɹatəs lʌmbˈɔːɹəm], \k_w_ˈɒ_d_ɹ_a_t_ə_s l_ʌ_m_b_ˈɔː_ɹ_ə_m]\
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A flat, somewhat thick, irregularly quadrilateral muscle, situate in the loins, at the sides of the vertebral column. It is attached, below, to the crista ilii and ilio-lumbar ligament; and above, to the inferior margin of the last rib; and besides, to the base of the transverse processes of the last four lumbar vertebrae. This muscle inclines the loins to its side; depresses the last rib, and is thus a muscle of respiration. It can also raise the hip.
By Robley Dunglison
