Chapter 16

Emotions also play a crucial role for guiding social behavior in most social species, including humans and primates. This chapter considers various theories of emotion, both historical and contemporary, and then places these theories into the context of the known neuroscientific basis of emotional processing. It shows that how the same brain networks are used to process both social stimuli as well as nonsocial stimuli with affective properties. The chapter also considers how social information is extracted from facial expressions and eye gaze. Evidence for the neural basis of theory of mind has come from several sources: functional imaging studies of neurotypical participants, studies of neurodevelopmental differences (primarily autism), and behavioral studies of patients with brain lesions.


Part of the limbic system, implicated in learning the emotional value of stimuli (e.g. in fear conditioning)

Amygdala

A variant of autism linked to normal-to-high intelligence

Asperger syndrome

The presence of markedly abnormal or impaired development in social interaction and communication, and a markedly restricted repertoire of activities and interests

Autism

Different categories of emotions assumed to be independent of culture and with their own biological basis (in terms of evolution and neural substrate)

Basic emotions

An account of autism in which the social difficulties are considered as a consequence of mirror-system dysfunction

Broken mirror theory

People report that their acquaintances (spouse, family, friends and so on) have been replaced by " body doubles."

Capgras syndrome

Theory centered on the hypothalamus’ role in emotions in which bodily responses occur after the emotion itself

Canon-Bard theory

Other members of the same species

Conspecific

A state associated with stimuli that are rewarding (i.e. that one works to obtain) or punishing (i.e. that one works to avoid). These stimuli often have an inherent survival value

Emotion

The ability to appreciate others’ points of view and share their experiences

Empathy

External motor outcomes in the face and body associated with emotional states

Expression

Learning that a previously rewarded stimulus is no longer rewarded

Extinction learning

A belief that differs from one’s own belief and that differs from the true state of the world

False belief

A region of cortex buried beneath the temporal lobes; involved in body perception and contains the primary gustatory cortex; responds to disgust

Insula

A sensory system for monitoring the internal state of the body (e.g. heart rate)

Interoception

The self-perception of bodily changes produces emotional experience (e.g. one is sad because one cries)

James–Lange theory

In monkeys after bilateral amygdala and temporal lesions, an unusual tameness and emotional blunting; a tendency to examine objects with the mouth; and dietary changes

Kluver–Bucy syndrome

Neural circuits or regions that disregard the distinction between self and other

Mirror systems

An emotional state that is extended over time (e.g. anxiety is a mood and fear is an emotion)

Mood

Emotions that are related to the behavior of oneself (in relation to others) or the behavior of others (in relation to oneself or others)

Moral emotions

EEG oscillations at 8–13 Hz over sensory-motor cortex that are greatest when participants are at rest

Mu oscillations

The process of sharing the emotions or mental states of others

Mirroring

The process of inferring or attributing mental states to others

Mentalizing

A limbic-based circuit that was once thought to constitute a largely undifferentiated " emotional" brain

Papez circuit

Changes in electrical conductivity on a person’s skin, triggered by certain stimuli (e.g. emotional or familiar stimuli)

Skin conductance response (SCR)

The theory that we come to understand others (their emotions, actions, mental states) by vicariously producing their current state in ourselves

Simulation theory

The ability to represent the mental states of others (e.g. their beliefs, desires, intentions)

Theory-of-mind

Part of the basal ganglia that includes the nucleus accumbens; involved in a " limbic circuit" connecting the orbitofrontal cortex, basal ganglia, and thalamus

Ventral striatum