Step 1: Understanding the Question:
The question asks to identify the classical theory of emotion asserting that emotional experience and physiological arousal occur simultaneously via thalamic pathways.
Step 2: Detailed Explanation:
• The Cannon-Bard theory of emotion (proposed by Walter Cannon and Philip Bard) argues that emotional feelings and physical arousal are parallel, independent processes.
• When an emotion-triggering stimulus is perceived, sensory pathways transmit this information to the thalamus.
• The thalamus simultaneously relays this information to the cerebral cortex (producing the subjective experience of emotion) and the autonomic nervous system (triggering bodily arousal).
• The James-Lange theory, by contrast, argues that physiological arousal occurs first, and our cognitive perception of that physical state is what we label as emotion.
• The Schachter-Singer (two-factor) theory states that emotion is determined by both undifferentiated physiological arousal and a cognitive label applied to it.
• The Facial Feedback hypothesis focuses on how facial muscle movements directly modulate emotional experiences.
Step 3: Final Answer:
The theory pointing to simultaneous thalamic distribution of emotional experience and arousal is the Cannon-Bard theory.