Optic axons regenerate into normal but not acellular peripheral nerve (PN) grafts. The first axons penetrate the PN graft before 5 days and grow inside the basal lamina tubes amongst the Schwann cells. By 30 days, 4% of the surviving retinal ganglion cells (RGC) regenerate axons for at least 10 mm into the PN graft. Laminin rich basal lamina tubes persist… (More)
The notion of homogeneous barycentric coordinates provides a powerful tool of analysing problems in plane geometry. In this paper, we explain the advantages over the traditional use of trilinear coordinates , and illustrate its powerfulness in leading to discoveries of new and interesting collinearity relations of points associated with a triangle.
The intersections of the corresponding sidelines of the cevian triangles of two points P0 and P1 form the anticevian triangle of a point T (P0, P1). We prove a number of interesting results relating the pair of inscribed conics with perspectors (Brianchon points) P0 and P1, in particular, a simple description of the fourth common tangent of the conics. We… (More)
In this paper we give a new, synthetic condition under which a central axonometric mapping is a central projection. This condition is applied for controlling the change of unit points of a central axonometric reference system. Correction of a central axonometric system to be of central projection type is also discussed by the help of our condition.