SOCIAL COGNITION Flashcards
. Orbitofrontal cortex & personality . Self-perception & default-mode network . Perception of others / Theory of Mind . Non-verbal cues (joint attention, biological motion, animacy) . Autism . Moral reasoning . Other disorders with social implications (Psychopaths, orbitofrontal patients, schizophrenia, depression)
Phineas
Gage
– 1848; railroad foreman
– Accidental explosion
»> tamping iron through skull
– Remained conscious, wounds
healed
– Dramatically altered personality
“irreverent, indulging in the grossest profanity (which was not previously his custom), manifesting little deference to his fellows, impatient of restraint or advice when it conflicts with his desires.”
Frontal Lobotomies
1930's-1950's – Common treatment for depression & neurosis – Successful(ish).... much less anxious, impulsive, depressed – But.... withdrawn, under-active, lacking in affect/responsiveness (overly docile)
Orbitofrontal Tumors Story
“She had neither the energy nor the desire to do the things she normally did, like sing in the church choir or participate in other church activities (she was a deaconess, active in
women’s ministries, etc.) She seemed emotionally flat–no real passion for the things she normally cared deeply about. She had no
emotional depth–no anger or sadness or excitement or joy. She also stopped working for me in my ministry (she ran the office of Understanding Your Teenager). I had to hire someone else to replace her. She stopped doing household duties (I eventually hired a housekeeper and learned how to cook!) When she was awake,
she just sat in her chair and watched
TV (which was not like her at all.)
As you can imagine, this was hard for me to deal with. I experienced emotions that ranging from anxiety and sorrow to frustration and anger. I told her more than once that I “wanted my wife back” but she seemed unable or unwilling to change.”
http://
waynerice.com/marci.htm#MARCI%27S
%20SYMPTOMS:
– Acquired pedophilia that disappeared after surgery.
“Self-referential processing”
– Memory is better for information processed in relation to self
. We are more likely to remember an adjective if asked to judge how well it describes themselves (vs the president)
. ”Self-referent effect”
– Why do we pay more attention to self?
. Is self is a special cognitive structure?
Medial Prefrontal Cortex
MPFC
– fMRI Study:
MPFC was differentially activated in Self condition
(does this trait describe
you?) vs Other (does this trait describe George Bush?) and Printed Format (is this word presented in capital letters?)
Evidence for mPFC
(medial prefrontal cortex)
in self-referent processing:
– fMRI
– Profound amnesia (due to hypoxia in patient R.B., retrograde & anterograde) still leaves intact ability to describe personality.
• These people still know themselves
Default Mode Network
fMRI
• Most brain regions show ac2va2on to tasks compared to “rest” • Default Mode Network shows deac2va2ons – More acIve during “rest” – Why? – What are we doing during “rest”? • Daydreaming • Thinking about self – What do I need to do later? – How do I feel? – Includes MPFC
Perception of others
fMRI
Judge personality or sentence structure (mPFC)
Theory of Mind
Theory of mind =
understanding the beliefs, thoughts, and intentions of others
– Developmental Milestones:
. Age 3-4, recognition that
physical vantage point is
unique
. Age 5-6, recognition that mental states of others are
different
. Age 6-7, difference
between literal meaning of words and speaker’s intention
(irony, joking, lying)
. Age 9-11: represent mental states of multiple people
Theory of Mind:
Sally-Anne Test
– 3yr olds fail
– 5yr olds pass
Localizer Task
False beliefs about people
vs.
False photos (e.g., inaccurate map)
acIvates right Temporal-parietal junction (rTPJ)
rTPJ
right Temporal-parietal junction
False beliefs about people
vs.
False photos (e.g., inaccurate map)
Neural Correlates of Theory of Mind
– Read passages describing: . Thoughts ("Nicky knew that his sister's flight was delayed by 10 hrs") . Bodily Sensations ("Sheila's stomach was starving because she skipped breakfast") . Appearance ("Joe was a heavy-set man")
– rTPJ is more active for
descriptions of others’ thoughts than bodily sensations or appearance
– rTPJ is sensitive to thinking
about mental states of others
Non-Verbal
Cues
Joint Attention =
ability to monitor another
person’s attention
. Superior temporal sulcus
(STS); near TPJ
. Greater activity when eyes shifted away from salient stimulus (social cue)
. Greater activity when face making eye-contact with you vs. looking away
Joint Attention
the ability to monitor another
person’s attention