Marshall McLuhan: “Travel differs very little from going to a movie or turning pages in a magazine … [The] world itself becomes a sort of museum for objects that have been encountered before in some other medium.”
In this sentence there is 3 mistake.
The amygdalae send impulses to the hypothalamus for important activation of the sympathetic nervous system, to the reticular nucleus for increased reflexes, to the nuclei of the trigeminal nerve and facial nerve for facial expressions of fear, and to the ventral tegmental area, locus coeruleus, and laterodorsal tegmental nucleus for activation of dopamine, norepinephrine and epinephrine.
The cortical nucleus is involved in the sense of smell and pheromone-processing. It receives input from the olfactory bulb and olfactory cortex. The lateral amygdalae, which send impulses to the rest of the basolateral complexes and to the centromedial nuclei, receive input from the sensory systems. The centromedial nuclei are the main outputs for the basolateral complexes, and are involved in emotional arousal in rats and cats.
In complex vertebrates, including humans, the amygdalae perform primary roles in the formation and storage of memories associated with emotional events. Research indicates that, during fear conditioning, sensory stimuli reach the basolateral complexes of the amygdalae, particularly the lateral nuclei, where they form associations with memories of the stimuli. The association between stimuli and the aversive events they predict may be mediated by long-term potentiation, a lingering potential for affected synapses to react more readily.
From the social psychology lessons on iTunes U:
We are not neutral processors of information. Our pre-existing attitudes lead us to take in information that agrees with our attitudes and accept that while we reject information that contradicts our social attitudes.
A state of cognitive dissonance is harmful and painful. When we are in this state of painful dissonance we seek change and we engage in actions that restore our beliefs to a more consonant state.
Negative reactions are stronger than positive reactions.