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from article Lie detector

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A lie detector test or polygraph measures and records several physiological indices (for example, blood pressure, pulse, respiration, and skin conductivity) while a person is asked and answers a series of questions. The belief underpinning the use…

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from article Anorexia nervosa

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Anorexia nervosa is a serious disorder and can have severe health consequences that go far beyond simple weight loss. (Credit: Office on Women's Health, U.S. Department of Health and Human Services)

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from article Anorexia nervosa

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Incidence (%) of eating disorders among teenagers (13 to 18 years old) in the United States. Three types of eating disorders are included in the data: anorexia nervosa, bulimia nervosa, and binge eating disorder. Note that female teens are much more…

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from article Speech perception

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The perception of speech (as well as the production of speech) involves interactive processes occurring in various regions of the brain. Researchers also have noted the important contribution that vision makes to normal speech perception. (Copyright…

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from article Speech perception

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An auditory spectrogram of the word "telephone." (a) The vertical striations in the bands represent amplitude modulation at the frequency of the voice pitch. Such striations are absent from the initial noise portion corresponding to the voiceless…

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from article Sleep-dependent memory processing

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The sleep cycle, memory systems, and memory stages. (a) The human sleep cycle. Across the night, rapid eye movement (REM) sleep and non-REM (NREM) sleep cycle every 90 minutes in an ultradian manner (that is, occurring in cycles that are repeated…

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from article Sleep-dependent memory processing

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Sleep-dependent motor skill learning. (a) Wake first. After morning training (10 a.m., clear bar), subjects showed no significant change in performance when tested after 12 hours of wake time (10 p.m., clear bar). However, when tested again…

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from article Sleep-dependent memory processing

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Sleep-dependent integration of human relational memory. (a) Delayed inference (associative) memory performance (% correct) in a relational memory task following different offline delays. Immediate testing after just a 20-min offline delay…

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from article Territoriality

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The tiger (Panthera tigris) is highly territorial in its behavior. (Credit: Safique Hazarika Photography/Getty Images)

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from article Hunger

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Principles of appetite regulation by gut–brain peptides. Tissues and organs, including the pancreas, stomach, small intestine, adipose tissue, and large intestine, are sources of peptides that stimulate or inhibit appetite-regulating neurons in the…

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