A method of detecting respiratory effort by outputting changes in capacitance through an oscillator and to a calibrator unit.

A recording of various physiologic parameters relating to sleep, such as EEG’s, EOG’s, EMG’s and respiratory parameters.

Michelangelo completes the sculpture David, Martin Luther launches the Protestant Reformation, Elizabeth I is crowned queen in England, and Shakespeare’s Hamlet is produced. These events occurred during the Romantic era.

French Revolution.jpg Which historical event occurred during the Classical era?

Which genre of music emerged in the 1950s and is characterized by merging African-American rhythm and blues with country-western?

Gettysburg Address.jpg Growth of Capitalism and Socialism , the American Civil War, and Lincoln’s Gettysburg Address occurred during the Romantic era.

Referred to as modernism, music contained diverse reactions by challenging, and in some instances, reinterpreted established approaches to composition. 

Pilgrims near shore.jpg Establishment of the Jamestown Settlement in North America, The Thirty Years War, Arrival of the Pilgrims, and Salem Witch Trials. These events took place during the Baroque era.

The end of the Commonwealth of England & the return of Monarchy during English Restoration occurred in which era?

Jazz emerged in New Orleans around the beginning of the 20th century and combines African rhythms and European hymns.