ðə sˈʌlkəs lˈɪmɪtənz ɪz ɐ ɡɹˈuːv ˌɔn ˈiːðɚ sˈaɪd ʌvðə mˈɪdlaɪn ɪnðə ɹˈɑːmbɔɪd fˈɑːsə flˈoːɹ ʌvðə fˈoːɹθ vˈɛntɹɪkəl.
The sulcus limitans is a groove on either side of the midline in the rhomboid fossa (floor of the fourth ventricle).