Dictionary > Hypothalamic theory

Hypothalamic theory

A theory on emotion formulated by Walter Cannon in 1929 which states that the diencephalon, consisting of hypothalamus and thalamus, serves as the center of emotional expression whereas the cerebral cortex is the center of emotional experience. According to this theory, nerve impulses from sensory nerves reach and trigger the thalamus to interpret and send impulses to the cerebral cortex so that the emotion is experienced. Simultaneously, it also sends impulses to the autonomic system to cause physiological changes in the viscera and muscles so that the behaviour specific to this emotion is expressed.
Historically, this theory is formulated by Walter Cannon as an argument to the theory of William James on emotion (called Body Reaction theory).
The fight-or-flight response in animals is implicated in this theory where it assumes that an animal facing a stimulus of threat experiences independent but simultaneous reactions, such as the psychological awareness of the emotion in the brain, and the physiological changes triggered by the autonomic nervous system, (which altogether preparing the animal to respond – either to fight or flee – in threatening situations).

Compare: Body Reaction theory
See also: fight-or-flight response

You will also like...

Wart-like leaf galls on grape leaves
Plant Cell Defense

Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..

Photosynthesis and respiration
Plant Metabolism

Plants are responsible for incredible feats of molecular transformation. Plant processes, such as photosynthesis, photop..

Birth Control and Contraception
Birth Control and Contraception

Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..

Early Earth
The Origins of Life

This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..

The Human Physiology
The Human Physiology

Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

Schematic diagram of bacterial lactose operon
Gene Action – Operon Hypothesis

Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..