Wednesday, September 10, 2014

Emotions

Major theories of emotion and arousal as they relate to human motivation can be classified in three main categories, physiological, neurological and cognitive.  Physiological theories suggest that responses within the body are responsible for emotions.  Neurological theories propose that activity within the brain leads to emotional responses.  Cognitive theories suggest that thought and other mental activity play an important role in the formation of emotions.
The James-Lange theory of emotion was developed in 1884 by William James and Carl Lange.  This theory suggests that emotions are a result of physiological changes. The emphasis of the theory lies in the proposal that physiological changes in the autonomic nervous system result in emotions, not that emotions cause physiological changes ("James-Lange theory," 2009).  According to an article on about.com William James explained, “My thesis on the contrary is that the bodily changes follow directly the PERCEPTION of the exciting fact, and that our feelings of the same changes as they occur is the emotion (Cherry, 2011).”  The James-Lange theory of emotion has been challenged by other theories of emotions. The Cannon-Bard theory of emotion is a specific theory that challenges the James-Lange theory.
The Cannon-Bard theory of emotion was developed in 1927 by Walter Cannon and Philip Bard.  This theory defends the view that emotion-eliciting stimuli or events trigger physiological arousal and the experience of emotion simultaneously and independently.  The Cannon-Bard theory suggests that emotions originate in the thalamus, which is the part of the brain that sends messages from the sensory organs to the autonomic nervous system, cerebral cortex, and skeletal muscles, thus affecting arousal, conscious thought, and motor behavior.  For example, if you heat a sudden loud noise while at home alone, you may simultaneously feel afraid and experience heart palpitations.  Cannon stated that bodily sensations alone could not evoke emotions ("Cannon-Bard theory," 2009).




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