ɪnðə spˈaɪnəl kˈoːɹd, ˌɛsˌeɪtʃˈeɪtʃ ɪz dᵻɹˈɛktᵻd baɪ bˈoʊθ ðə nˈɑːɾəkˌɔːɹd ænd flˈoːɹ plˈeɪt ɹˈiːdʒənz wˌɪtʃ ˈʌltᵻmətli dɹˈaɪvz ðɪ ˌɔːɹɡɐnᵻzˈeɪʃən ʌv nˈʊɹɹəl ænd ɡlˈaɪəl pɹoʊdʒˈɛnɪɾɚ pˌɑːpjʊlˈeɪʃənz.
In the spinal cord, Shh is directed by both the notochord and floor plate regions which ultimately drives the organization of neural and glial progenitor populations.