 The two posterior bur holes were then connected with a punch over the superior sagittal sinus and then the craniotome was used to fashion a flap first on the left and then on the right, going paramedian along the superior sagittal sinus in the midline and then curving over the fronto-orbital bar. 
The two posterior bur holes were then connected with a punch over the superior sagittal sinus and then the craniotome was used to fashion a flap first on the left and then on the right , going paramedian along the superior sagittal sinus in the midline and then curving over the fronto - orbital bar .