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Technology and Society 1
Brain maturation and
risk behavior
TISPOLLONDON 6th. April 2009
Dagfinn Moe (dagfinn.moe@sintef.no)Senior Research Scientist
SINTEF NORWAY
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Road conditions
Traffic situation
Vehicle
Neurobiology
Inter-aktion
”The truth about the accident” (What – How – Why)
Sociology Psychology
Human Factors
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functional Magnetic Resonance Imaging (fMRI)
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BAC:0,19 BAC: 0,14
fMRI-group in Bergen 2008The effect of alcohol on working memory
(Gundersen, Grüner, Specht and Hugdahl-2008)
Sober BAC: 0,08
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Maturation and
learning
Gogtay, Giedd, et al. (2004) Proc. Natl. Acad. Sci. USA
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Adolescent brain development can be divided into four processes:
(Giedd-2006,Toga-2006 Steinberg-2008)
ProliferationRapid growth of brain matter and new connections
Pruning Cutting away of unused or unimportant connections
MyelinationInsulating of connections to make them faster and more stable
Remodeling of the dopamin and oxytocin systemsThere is a redistribution
of dopamine and oxytocin concentration around puberty
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PRUNING AND MYELINATION”building superhighways”
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•Learning•Memory•Emotion
THE LIMBIC SYSTEM – EMOTIONAL BRAIN”heaven and hell”
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Rat
e of
Mat
urat
ion
adolescent
“emotional” brain
“thinking” brain
Galvan et al 2006 Developmental Science
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The battle between the emotional and the thinking brain
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Criminal
safety belt
drugs-speeding
KvinneMann
0 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 78 81 84 87 91100
Alder
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An
tall d
rep
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g h
ard
t s
ka
dd
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2-2
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Men 18-25
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Adolescence is generally a period of increased impulsivity and risk-taking behaviour, but some teens might be
especially prone to engage in such behaviours.
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