PSY 340 Lecture Notes - Lecture 4: Decision-Making, Conscientiousness, Agreeableness

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7 Feb 2017
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Biological basis of personality
All persoality differees are iologial …i the sese that they ust e…geerated
i the rai o atter hether they origiated i the gees or eiroet
o But how does it function?
But how to get into the brain
o Phrenology Franz Joseph Gall
o Modern technology
Anatomy (structure & personality)
Biochemistry (chemistry & personality)
Brain & personality
Ways to study brain function
o Brain injury
Phineas Gage
Injury now dramatic change in personality
o Brain surgery
H.M.
Could’t reeer e house or people
Hippocampus=making new memories bad but long term
memories are good
EEG, MEG, TMS
o Imaging
CT, MRI, PET, fMRI
Cells
o Neurons
Several parts
Receive signals from dendrites
Messages combine in cell body that holds the nucleus
Travels down the axon covered by myelin sheaths
To the axon terminals
O its o does othig it’s aout oetios
o Glial
Connected in complex pathways
o In CNS
o In PNS
Brain chemistry How the brain communicates
Neurotransmitters & Hormones
o Nervous system functions partially based on the number, availability, and
responsivity of target cells to chemical messengers
Many functions based on:
o Target cell
o Other NTs/hormones
o Amount
o Many other factors
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