ðə nˈɑːkʃəs stˈɪmjʊlˌaɪ ˈæktᵻvˌeɪts ɐ sˌɪmpəθˈɛɾɪk sˈɜːdʒ ðæt tɹænsmˈɪts θɹuː ɪntˈækt pɚɹˈɪfɚɹəl nˈɜːvz, ɹɪzˈʌltɪŋ ɪn sɪstˈɛmɪk vˌæsəkənstɹˈɪkʃən bᵻlˌoʊ ðə lˈɛvəl ʌvðə spˈaɪnəl kˈoːɹd lˈiːʒən.
The noxious stimuli activates a sympathetic surge that transmits through intact peripheral nerves, resulting in systemic vasoconstriction below the level of the spinal cord lesion.