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.
The basic format consists of five digits. An extended 'ZIP+4' code was introduced in 1983 which includes the five digits of the ZIP Code, followed by a hyphen and four additional digits that determine a more specific location. The term ZIP Code was originally registered as a servicemark by the U.S. Postal Service, but its registration has since expired.