ˌɔn ˈiːðɚ sˈaɪd ʌvðə mˈɪdlaɪn ʌvðɪ ɪndˈuːsiəm ɡɹˈaɪsiːəm ɑːɹ tˈuː ɹˈɪdʒᵻz fˈɔːɹmd baɪ bˈændz ʌv lˈɔndʒɪtˌuːdɪnəli dᵻɹˈɛktᵻd fˈaɪbɚz nˈoʊn æz ðə mˈiːdiːəl ænd lˈæɾɚɹəl lˈɔndʒɪtˌuːdɪnəl stɹˈaɪə.
On either side of the midline of the indusium griseum are two ridges formed by bands of longitudinally directed fibers known as the medial and lateral longitudinal striae.