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The Cannon-Bard Theory of emotion emphasizes the simultaneous experience of physiological responses and emotional experiences. According to this theory, when an emotional stimulus is encountered, the thalamus processes this information and sends signals to both the cortex, which is responsible for the emotional experience, and the autonomic nervous system, which triggers physiological responses. This means that emotions and bodily reactions occur at the same time rather than one causing the other in a sequential manner.

The theory challenges earlier views, particularly the James-Lange Theory, which suggested that physiological responses precede and lead to the emotional experience. By asserting that both responses happen simultaneously, the Cannon-Bard Theory highlights the integrated nature of how humans process emotions, indicating that they are not solely based on physical reactions but also on an emotional awareness that occurs concurrently. This key understanding is vital for comprehending how emotional responses are generated and the immediate connection between our feelings and physiological states.