Vertigo could be either from a peripheral (labyrinth and vestibular nerve) or a central disorder (central nervous system). Central vertigo is usually a result of an abnormal processing of the vestibular sensory input by the central nervous system. See the image below.
scatterhist(x,y) creates a 2-D scatter plot of the data in vectors x and y, and displays the marginal distributions of x and y as univariate histograms on the horizontal and vertical axes of the scatter plot, respectively. example.
A discogram, or discography, is an interventional diagnostic imaging test that helps determine whether a specific intervertebral disc may be the source of back pain. Intervertebral discs are sponge-like cushions between the vertebrae, or bones, of the spine.