Abnormal posturing is different from bad posture or slouching.. Instead, it involves holding a body position, or moving one or more parts of the body in a certain way. Abnormal posturing may be a sign of certain injuries to the brain or spinal cord.
Follow @TIME. 1963 was a momentous year in America: President John F. Kennedy was assassinated, Martin Luther King Jr. delivered his âI Have a Dreamâ speech at the March on Washington and, somewhat less heralded by all but the most fervent postal historians, the ZIP code was introduced.
Later, in 1983 the ZIP + 4 system was implemented by the United States Postal Service. This system is an expanded ZIP codes system and also called as plus-four codes or add-on codes. Extra four digits represent a geographic area within the five-digit delivery area.