Abstract：Objective To observe the anatomic localization of supratrochlear nerve and supratrochlear artery. To provide anatomical basis for preventing the injury of supratrochlear nerve and supratrochlear artery.Methods Forty hemibrows of the 20 heads of the cadavers which were fixed in 10% formaldehyde were chosen. The distances from the foramen supratrochlear to the anterior median line, the supraorbital notch and the origin of the corrugator supercilii were measured. The horizontal line which was through the apogee of the two sides superciliaris arch was X-axis. The vertical which was through the anterior median line was Y-axis. The two points of intersection was O point. The pictures of track of supratrochlear nerve and supratrochlear artery were made by using SigmaPlot software.Results Twenty-four hemibrows of the 12 heads of the cadavers was occurrence foramen supratrochlear in the 40 hemibrows of the 20 heads of the cadavers. The occurrence rate was 60%. The distance between the foramen supratrochlear and the anterior median line was (15.85±2.52)mm, the left was (16.56±3.08)mm, the right was (15.04±1.51)mm. The foramen supratrochlear was located the medial of the supraorbital notch (9.42±3.51)mm, the left was (8.78±3.24)mm, the right was (10.16±3.91)mm. The distance between the foramen supratrochlear and the origin of the corrugator supercilii was (10.73±2.41)mm, the left was (10.91±2.82)mm, the right was (10.35±1.57)mm.According to the range trajectory we could get: The most danger zone of damaging the supratrochlear nerve was(7.18±3.82)mm-(13.90±1.60)mm in the left of the forehead and (-7.27±4.06)mm-(-13.28±2.76)mm in the right of the forehead on the superciliary arch above 32.5cm and below 20cm; the most danger zone of damaging the supratrochlear artery was (8.67±2.46)mm-(16.92±2.36)mm in the left of the forehead and (-9.43±3.07)mm-(-15.48±1.62)mm in the right of the forehead on the superciliary arch above 20 mm and below 20 mm.Coclusions There is a danger zone in forehead brow in which it is easy to damage the supratrochlear nerve and supratrochlear artery.
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