Disorders of the spinal cord or spine (vertebra), causing numbness and tingling in arms and/or legs: 1  Spinal cord injury. Injuries of the cervical spine result in symmetrical arm and leg paralysis and numbness. Injuries at the thoracic level affect trunk and legs, and lumbar and sacral injuries affect hips and legs.
Generalizations are summary statements of relationships between concepts, summary statements of cause and effect, or summary statements of predictions of future relationships. Generalizations are powerful as they provide a way to consolidate information to make it more usable and easier to remember. Laws, principals, and theories are all kinds of generalizations. These generalizations require the connection of concepts by a relationship.
Polarization (also polarisation) is a property of waves that can oscillate with more than one orientation. Electromagnetic waves such as light exhibit polarization, as do some other types of wave, such as gravitational waves.Sound waves in a gas or liquid do not exhibit polarization, since the oscillation is always in the direction the wave travels. polarizer is an optical filter that transmits only one polarization. Polarization is an important parameter in areas of science dealing with transverse wave propagation, such as optics, seismology, radio, and microwaves.