31. The anal sulcus is wide and shallow, the fasciole not excavated, inconspicuous. 32. The sulcus limitans extends the length of the spinal cord and through the mesencephalon. 33. Vocal sulcus was noted in ~ 10 % of both men and women .. 34. The anal sulcus is wide and shallow .. 35. It even features an interventricular sulcus , the crease dividing the left ventricle from right. 36. Continuing in a sulcus that runs rostrally, and is known as the sulcus limitans. 37. Continuing in a sulcus that runs rostrally, and is known as the sulcus limitans. 38. It corresponds to the angular gyrus surrounding the caudal tip of the superior temporal sulcus . 39. In individuals without autism, the superior temporal sulcus also activates when hearing human voices. 40. The sulcus is rarely present in females.