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Week 10 Notes

by: jjb13n

Week 10 Notes PSY 4930

GPA 2.54
Affective Neuroscience
Dr. Wen Li

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Affective Neuroscience
Dr. Wen Li
Class Notes
25 ?




Popular in Affective Neuroscience

Popular in Psychlogy

This 5 page Class Notes was uploaded by jjb13n on Saturday October 31, 2015. The Class Notes belongs to PSY 4930 at Florida State University taught by Dr. Wen Li in Summer 2015. Since its upload, it has received 25 views. For similar materials see Affective Neuroscience in Psychlogy at Florida State University.


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Date Created: 10/31/15
Week 10 Notes What is Perception Information processing Brain s reconstruction of reality Translates physical world into psychological terms 0 Vision photons gt sight 0 Audition air vibration gt sound 0 Olfaction airborne molecules gt smell 0 Personal re ection of reality Process by which we become aware of objects and events in external world Making sense of the world around us Stages of Perception 0 Stage 1 Selection 0 We don t perceive everything 0 10000 bits of sensory info available per second 0 Factors in uencing selection I Saliency physical brightness loudness I Biologyphysiology needs motivation I Emotion approach avoid 0 Stage 2 Organization 0 To sort stimuli into categories 0 Constructivism Theory we organize and interpret experience by applying cognitive structures 0 Schemata organizational structures to make sense of what we have noticed prototypes O Relatedness size color function eg electronics 0 Stage 3 Interpretation 0 Subjective process of explaining our perceptions in ways that make sense to us Construct an explanation Stages of Emotion Perception 0 Early 0 Automatic 0 Unconscious 0 Quick and dirty 0 Late 0 Controlled O Conscious o Elaborated ContextDependent Emotion Perception 0 Processing of emotional facial expressions as a function of time Q a Structures involved in emotion recognition at various time points I A amygdala FFA fusiform face area INS insula O orbitofrontal corteX SC superior collicus SCX striate corteX V1 SS somatosensory corteX STG superior temporal gyrus I T thalamus b Time course of emotion recognition from the onset of the stimulus at the top through perception to final recognition of the emotion at the bottom Sensory features gt configuration gt knowledge base Simple local gt complex global networks Parvizi Fusiform is critical for face processing Different Visual Systems for Emotion Perception O Parvocellular O O O O O O 90 of total population of ganglion cells Small Colorrelated Highcontrast Slow Dominant in the ventral pathway 0 Magnocellular 0 00000 5 of total population of ganglion cells Large Motionrelated Lowcontrast info Fast Dominant in dorsal and subcortical pathway Amygdala s Role in Emotion Perception O Amygdala projects feedback input to the visual cortex releasing glutamate to upregulate visual processing 0 Indirect O Amygdala in uences eye xation thereby in uencing the visual information projected to the retina O Amygdala in uences attention via projections to the basal forebrain or PFC OFCSomatosensory CortexInsula in Emotion Perception Depthelectrode recording in OFC shows very rapid emotion processing 120 ms Pathological or arti cial TMS lesions in OFC interferes with emotion esp threatrelated processing 0 Lesions in the right ventral primary secondary somatosensory areas comprise emotion recognition perhaps related to the emotional state of the perceiver embodied emotion o Insula is important for disgust emotion perception Definition of Chemical Senses O Gustation Taste chemical substances stimulate taste receptors in the papillae on the tongue 0 Olfaction Smell volatile airborne chemical molecule stimulate the olfactory receptors in the epithelium in the nasal cavity 0 Flavor a combination of taste and smell with the smell part contributing to the enormous complexity of avor The Olfactory Sense and Emotion o Anatomical Relation O No thalamic relay 0 Direct bulbar input to amygdala 0 Direct connections to limbic 0 Basic olfactory processing involved piriform cortex amygdala and OFC o Psychological Relation O The rst psychological dimension of olfaction emotion O Olfactory is a sensory emotion Emotion is the olfactory object Olfactory Emotion Processing 0 Amygdala and OFC O OFC supports positive medial OFC and negative lateral OFC olfactory affect o The olfactory neuroanatomy is unique 0 Conducive to emotionolfaction interaction 0 Olfactory emotion is not only processed in the limbic system but is also encoded in the sensory cortex 0 Emotion perception can be modulated by multiple factors eg consciousness and attention Emotion Instilled into an Odor Changes Perceptual Encoding of the Odor O Emotion determines odor object representation 0 Aversive associative learning alters odor coding in the primary olfactory cortex 0 Emotion shifts perception perhaps more so for chemical than physical senses O Intimacy between olfaction and emotion Olfactory Contexts Shift Social Perception o Odor pleasantness valence significantly shifted likeability ratings but only for those participants lacking conscious awareness of the smells Magnitude of this priming effect decreased as sensitivity for odor detection increased Heart rate responses tracked odor valence independently of odor awareness Therefore social preferences are subject to in uences from odors that escape awareness whereas the availability of conscious odor information may disrupt such effects eg discounting effect Emotion perception can be modulated by multiple factors eg consciousness and attention


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