ch. 16: biopsychology of emotion, stress and health Flashcards
Darwins theory of evolution of emotion
- emotional responses accompany the same emotional states in all members of a species
- expressions of emotions evolve from behaviours that indicate what the animal is gonna do next
- original function of emotion may be lost in order to enhance their communicative function
- opposite measures are signaled by opposite movements which is called antithesis (dominance and aggression signaled by eye contact, submission signaled by looking away)
James Lange theories
- first physiological theory of emotion
- emotion inducing sensory stimuli are received and interpreted by cortex which triggers changes in skeletal muscles via somatic nervous system, then these responses trigger experience of emption in the brain
- argued that autonomic activity and behaviour that are triggered by emotional event produce the feeling of emotion
- emotional experience depends on feedback from autonomic and somatic nervous system
(causal relation)
cannon bard theories
- emotional stimuli have to independent excitatory effects: excite both the feeling of emotion in the brain and the expression of emotion in the autonomic system (views emotional experiences as paralell processes with no causal relation)
- emotional experience is independent from feedback of autonomic and somatic nervous system
modern biopsychological view on emotions
perception of emotion inducing stimulus, autonomic and somatic responses to stimulus, and experience of the emotion can influence each other
what brain structure is critical for the expression of aggressive responses
hypothalamus
Limbic system and emotion according to papez
- emotional expression is controlled by several interconnected nuclei
- amygdala, mamillary body, hippocampus, fornix, cingulate cortex, septum, olfactory bulb, hyopthalamus
Kluver bucy sundrome
- pattern of behvaiour in monkeys whose anterior temporal lobes had been removed
- ate anything that was edible, increase sex activity, lack of fear etc.
- damage to the amygdala
who came up with the atlas of facial expression associated with emotions
Ekman et al.
According to Ekman what are the primary emotions
- surprise, anger, sadness, disgust, fear, happiness
facial feedback hypothesis
our facial expressions infleucne our emotional experience
how to distinguish real vs fake expresisons
microexpressions, looking at muscles involved (orbicularis oculi is controlled involuntrily so only a real smile has this)
T or F: fear is the motivating force for defenseive behaviours
T
Primary function of agressive behaviours
to threaten or harm
Blanchard and Blanchard on colony intruder model of aggression and defense in rats
- ## dominant male and submissive male
distinguishing between defensive and aggressive behaviours
- topography (form)
- situations that elicit them
- apparent function
target site concept
idea that aggresive and defensive behaviours og an animal are often designed to attack specific sites while protecting its own (to protect itself)
testosterone and aggression
testosterone increases social aggression in males
- hard to interpret bc engaging with aggressive behvaiours increases testosterone itself
- aggressive behaviour does not increase in males at puberty even tho test levels rise, aggressive behaviour is not eliminated by aggression, and it is not increased by injections of testosterone
fear conditioning
establishment of fear in resonse to a previously neutral stimulus
LeDoux et al findings for auditory fear conditioning
- bilateral lesions to auditory pathways of rats, medial geniculate nucleus, blocked fear conditioning to a tone but lesions to the auditory cortex did not
- for fear conditioning to occur to a tone, the signals needed to reach the medial geniculate nucleus but not the auditory cortex
- found that lesions to amygdala blocked auditory fear conditioning
pathway from medial geniculate nucleus to amygdala was key in auditory fear conditioning
what are two amygdalar nuclei
lateral nucleus of amygdala and central nucleus of amygdala
-
role of lateral nucleus of amygdala and fear
- involved in acquisition, storage and expression of conditioned fear
- receives projections from hippocampus and and prefrontal cortex
lateral=learning of fear (storing, remembering and expressing)
role of central amygdala nucleus
controls defensive behaviour
central= defensive (cd)
T or F: emotions are expressed diffusley in the brain
T, no one centre
embodiment of emotions
re experiencing of related patterns of motor, autonomic and sensory neural activity during emotional experience