For example, panic attacks, particularly those that occur at nighttime, may result in lightheadedness, which can in turn cause dizziness and hyperventilation. Patients with post-traumatic stress disorder may also feel dizzy when lying down, although this is rare.
Introduction. The Great Migration, or the relocation of more than 6 million African Americans from the rural South to the cities of the North, Midwest and West from 1916 to 1970, had a huge impact on urban life in the United States.he Great Migration also began a new era of increasing political activism among African Americans, who after being disenfranchised in the South found a new place for themselves in public life in the cities of the North and West.
Some historians differentiate between a first Great Migration (1916â1930), which saw about 1.6 million people move from mostly rural areas to northern industrial cities, and a Second Great Migration (1940â1970), which began after the Great Depression and brought at least 5 million peopleâincluding many townspeople with urban skillsâto the north and to California and other western states.