\mˈɛdʌlə spɪnˈɑːliz], \mˈɛdʌlə spɪnˈɑːliz], \m_ˈɛ_d_ʌ_l_ə s_p_ɪ_n_ˈɑː_l_i_z]\
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By Princeton University
By DataStellar Co., Ltd
By Stedman, Thomas Lathrop
Prolongement rachidien of the encephalon, is the continuation of the medulla oblongata. It commences at the foramen magnum of the occipital bone, and descends in the vertebral canal as low as the 2d lumbar vertebra, without filling it; presenting, in its course, several evident enlargements. It is grooved on both its anterior and posterior surfaces by a furrow, which divides it, in its whole length, into two great nervous cords, intimately united with each other. it terminates by an oval tubercle, whence a number of nerves set out called Cauda equi'na, [F.] Queue de cheval, from its resemblance to a horse's tail. The spinal marrow has no analogy, as regards its structure, with the marrow of long bones. It is formed of two substances; one white, the other gray, presenting an inverse arrangement to that which they have in the brain, the white being external, the cineritious at the centre, Substantia grisea centralis. It is enveloped by a yellowish, fibrous membrane, very resisting, which seems to be continued insensibly from the pia mater, and by two other membranes, which are merely prolongations of the arachnoid and dura mater. See Nerve.
By Robley Dunglison
By Willam Alexander Newman Dorland
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- An analysis taken which politicallegal, economic, sociocultural and technological factors a company are in to account so as ocme up with the plans of organization for long term.