Walter Cannon

Walter Cannon was an American physiologist whose research shaped modern understanding of homeostasis, emotion, and the body's response to stress.

Philip Bard: An American physiologist who collaborated with Walter Cannon on theories of emotion and brain function. Bard worked with Cannon to develop the Cannon–Bard theory of emotion.
Homeostasis: The regulation of an organism’s internal conditions within ranges compatible with life. Cannon named and developed this principle of coordinated internal regulation.
Barium sulfate: A radiopaque compound used in medical imaging of the digestive tract. Cannon used it to make digestive movements visible in living animals under X-ray.
Stress (biology): The coordinated biological response to demands that threaten or challenge an organism’s stability. Cannon’s emergency-response research helped establish stress as a physiological subject.
William James: An American philosopher and psychologist whose theory proposed that bodily changes precede the experience of emotion. Cannon challenged James’s account of how bodily reactions relate to emotion.
Fight-or-flight response: A pattern of physiological changes that prepares an organism to confront danger or escape it. Cannon described this emergency response as a coordinated bodily reaction.
Fluoroscopy: An imaging technique that produces real-time X-ray views of internal structures. Cannon used fluoroscopy to study how emotion and stress altered digestion.
Hans Selye: A Hungarian-Canadian endocrinologist who developed the general adaptation syndrome model of stress. Selye extended physiological stress research after Cannon’s foundational work.
Walter Bradford Cannon: The full name of the American physiologist known as Walter Cannon. This alternate form of Cannon’s name appears in bibliographic records.
Sympathetic nervous system: The branch of the autonomic nervous system that mobilizes bodily resources during activity and stress. Its activation produces many of the rapid changes Cannon associated with emergency action.

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