How Common Is Major Depressive Disorder, and What Is Its

question 153

Essay

How common is major depressive disorder, and what is its course?

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Definitions:

Timbre

The quality of a musical note, sound, or tone that distinguishes different types of sound production, such as voices or musical instruments.

Opponent-Process Theory

A psychological and neurological model that explains how the perception of colors is controlled by the operation of opposing neural systems.

Place Theory

Theory of pitch that states that different pitches are experienced by the stimulation of hair cells in different locations on the organ of Corti.

Hair Cells

Sensory cells located in the inner ear that translate sound vibrations into electrical signals that the brain interprets as sound.