part of neural fold bending neural fold hinge point formation The formation of the median and lateral hinge points in the neural folds. These are created by apical constriction and basal expansion of the underlying neural cells. The median hinge point extends for the entire length of the neural tube, and the lateral hinge points do not form in the spinal cord region of the neural tube. biological_process GO:0021504 neural fold furrowing anatomical structure formation involved in morphogenesis