What are the two theories of emotion?
What is the James-Lange theory of emotion?
→ we experience emotions in response to physiological changes in our body
What is the Cannon-Bard theory of emotion?
→ We can experience emotions independently of emotional expression
When are emotions produced?
→ When signals reach the thalamus either directly from sensory receptors or by descending cortical input
What is the brain system responsible for emotion?
→ Broca’s limbic lobe
What are the 3 structures that make up Broca’s limbic lobe?
→ Parahippocampal gyrus
→ Cingulate gyrus
→ Subcallosal gyrus
What 3 areas of the brain form a ring around the corpus callosum?
→ Cingulate Gyrus of the Cingulate Cortex
→ Medial surface of the Temporal lobe
Describe the pathway that emotion takes?
→ Neocortex sends signals to the cingulate cortex which is responsible for emotions
→ this sends a signal via the hippocampus to the hypothalamus where the expression of emotion occurs
What is the proof that the hippocampus is involved in the behavioural expression of emotion?
→ Rabies infects the hippocampus
→ hyperemotional responses
What does a lesion in the anterior thalamus cause?
→ Spontaneous laughing or crying
What are the 3 subdivisions of the hippocampal complex?
→ Dentate gyrus
→ CA1-CA4 subfields
What are the 6 structures that make up the limbic system?
→ Cingulate gyrus → Parahippocampal structures → Septal nuclei → Amygdala → Entorhinal cortex → Hippocampal complex
What is the function of the limbic system?
→ Attaches behavioural significance and response to a stimulus
What does damage to the limbic system in animals cause?
→ profound effects on emotional responsiveness
What are the 3 roles of the cingulate gyrus?
→ Complex motor control
→ Pain perception
→ Social interactions/mood
What roles do the hippocampus and the para-hippocampal areas have?
What is the function of the amygdala?
→ Involved in learning and storage of emotional aspects of experience
What are the 2 ways to find out the function of a structure in the brain?
→ Lesion brain part
→ Hyperactivate it