The present disclosure relates to an apparatus for curing spinal stenosis which is an abnormal narrowing of the spinal canal between spinous processes, more particularly, to an apparatus of fixing spinous processes which can prevent the narrowing or widening of the spinal canal between spinous processes along the motion of the spine so as to enhance spinal stabilization. The microscope includes an eyepiece, an eyepiece focus adjustment, a microscope focus adjustment, a light source, at least one of an aperture or reticule, a camera view, a prism and an eyepiece. A cardiac signal associated with a pacing pulse is sensed and one or more features of the cardiac signal are detected. A DTR request is received from the mobile station at the base station. 5, where \u03b2 is a maximum photographic magnification. The at least one terminal region includes, at least in part, a bowl-shaped portion that has a diameter at the first surface greater than a width of the central region at the first surface.