Brain wave

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Possible Answers: IDEA.

Last seen on: LA Times Crossword 11 Jul 19, Thursday

Random information on the term “Brain wave”:

A delta wave is a high amplitude brain wave with a frequency of oscillation between 0.5–4 hertz. Delta waves, like other brain waves, are recorded with an electroencephalogram (EEG) and are usually associated with the deep stage 3 of NREM sleep, also known as slow-wave sleep (SWS), and aid in characterizing the depth of sleep.

“Delta waves” were first described in the 1930s by W. Grey Walter, who improved upon Hans Berger’s electroencephalograph machine (EEG) to detect alpha and delta waves. Delta waves can be quantified using quantitative electroencephalography.

Delta waves, like all brain waves, can be detected by electroencephalography (EEG). Delta waves were originally defined as having a frequency between 1-4 Hz, although more recent classifications put the boundaries at between 0.5 and 2 Hz. They are the slowest and highest amplitude classically described brainwaves, although recent studies have described slower (<0.1 Hz) oscillations Delta waves begin to appear in stage 3 sleep, but by stage 4 nearly all spectral activity is dominated by delta waves. Stage 3 sleep is defined as having less than 50% delta wave activity, while stage 4 sleep has more than 50% delta wave activity. These stages have recently been combined and are now collectively referred to as stage N3 slow-wave sleep. During N3 SWS, delta waves account for 20% or more of the EEG record during this stage. Delta waves occur in all mammals, and potentially all animals as well.


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Random information on the term “IDEA”:

Idea Vilariño Romani (Montevideo, 18 August 1920 – 28 April 2009) was a Uruguayan poet, essayist and literary critic.

She belonged to the group of intellectuals known as “Generación del 45.” In this generation, there are several writers such as Juan Carlos Onetti, Mario Benedetti, Sarandy Cabrera, Carlos Martínez Moreno, Ángel Rama, Carlos Real de Azúa, Carlos Maggi, Alfredo Gravina, Mario Arregui, Amanda Berenguer, Humberto Megget, Emir Rodríguez Monegal, Gladys Castelvecchi and José Pedro Díaz among others.

She also worked as a translator, composer and lecturer.

She was born to an educated, middle class family where music and literature were always present. Her father, Leandro Vilariño (1892-1944), was a poet whose works were not published in his lifetime. Just like her siblings, Numen, Poema, Azul, and Alma, she studied music. Her mother was very well educated in European literature[citation needed].

She was a professor of literature and secondary education from 1952 until The Coup of 1973. After the restoration of the democratic system, she returned to education, working as a professor in the department of Uruguayan and Latin-American literature in the College of Education of Humanities and Sciences of The University of the Republic.

IDEA on Wikipedia