The lacrimal bone is the smallest and most fragile bone of the face; roughly the size of the little fingernail. It is situated at the front part of the medial wall of the orbit.It has two surfaces and four borders.Several bony landmarks of the lacrimal bone function in the process of lacrimation or crying.n early lobe-finned fishes and ancestral tetrapods, the lacrimal bone is a relatively large and robust bone, running from the orbit to the nostrils. It forms part of the side of the face, between the nasal bones and the maxilla.
Medical Definition of spinocerebellar. : of or relating to the spinal cord and cerebellum spinocerebellar degeneration.
SARCOMERE. A sarcomere is the basic unit of a Muscle.. Muscle cells are composed of tubular Myofibrils.. Myofibrils are composed of repeating sections of sarcomeres, which appear under the microscope as dark and light bands.he sarcomeres are what give skeletal and cardiac muscles their striated appearance. 1  A sarcomere is defined as the segment between two neighboring Z-lines (or Z-discs, or Z bodies). 2  In electron micrographs of cross-striated muscle, the Z-line appears as a series of dark lines.