Adolescent development of the selection and manipulation of self-generated thoughts: a behavioural, functional and structural imaging study
Dumontheil, Iroise and Gilbert, S.J. and Blakemore, S.J. (2010) Adolescent development of the selection and manipulation of self-generated thoughts: a behavioural, functional and structural imaging study. In: The 20th Annual Rotman Research Institute Conference: The frontal lobes, 22-26th Mar 2010, Toronto, Canada. (Unpublished)
The anatomical maturation of lateral rostral prefrontal cortex (RLPFC) extends into adolescence. RLPFC is thought to support the ability to select and manipulate self-generated (stimulus-independent, SI), as opposed to stimulus-oriented (SO), information, in a controlled and flexible way. We investigated the development of this ability, the associated functional brain development, and the link between functional and structural maturation. Participants classified according to their shape letters either visually presented (SO phases) or that they generated in their head by continuing the alphabet sequence (SI phases) in the presence or absence of distracting letters. 179 participants (7-27 years old) participated in a behavioural study. Resistance to visual distractors exhibited small improvements with age. SI thoughts manipulation and switching between SI and SO thoughts showed steeper performance improvements extending into late adolescence. 37 participants (11-30 years old) participated in an fMRI study. SI thoughts manipulation and switching between SO and SI thoughts were each associated with brain regions consistently recruited across ages. In each contrast a single frontal brain region (left inferior frontal gyrus/anterior insula and right superior RLPFC respectively) exhibited decreased activations with age, which were not purely consequences of structural maturation and may reflect the maturation of neurocognitive strategies.
|Item Type:||Conference or Workshop Item (Paper)|
|School:||Birkbeck Schools and Departments > School of Science > Psychological Sciences|
|Research Centre:||Educational Neuroscience, Centre for, Brain and Cognitive Development, Centre for (CBCD)|
|Depositing User:||Sarah Hall|
|Date Deposited:||07 May 2015 14:54|
|Last Modified:||09 Dec 2016 11:17|
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