Sökning: "Anna Rieckmann"

Hittade 3 avhandlingar innehållade orden Anna Rieckmann.

  1. 1. Human aging, dopamine, and cognition : molecular and functional imaging of executive functions and implicit learning

    Författare :Anna Rieckmann; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Age-related deficits are legion in task switching, updating of information in working memory (WM) and inhibiting irrelevant information, collectively referred to as executive functions. Executive functions are tightly coupled to the dopaminergic system, and marked dopamine (DA) losses are observed across adulthood and aging. LÄS MER

  3. 2. Dopamine and the affective-cognitive gradient in the human striatum studied with multimodal brain imaging

    Författare :Filip Grill; Anna Rieckmann; Lars Nyberg; Alison Adcock; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; dopamine; striatum; incentive; motor; associative; reinforcement learning; reward prediction error; positron emission tomography; functional magnetic resonance imaging; PET MR; cognitive modelling;

    Sammanfattning : Both dopamine and the dopamine rich brain area, striatum, have been linked to behaviors related to incentives, motor action, and associative processing. Most of the cortex sends projections to the striatum, these connections have been described as a gradient organization representing a repertoire of functional behaviors. LÄS MER

  4. 3. The architecture of the aging brain : functional reorganization, structural changes, and the role of dopamine receptors

    Författare :Robin Pedersen; Alireza Salami; Anna Rieckmann; Anders Wåhlin; Lars Nyberg; Roser Sala-Llonch; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; brain architecture; functional connectivity; dopamine; aging; cognition; memory; functional magnetic resonance imaging; positron emission tomography; graph theory; Laplacian eigenmapping; gradient;

    Sammanfattning : Aging is associated with reorganization of functional brain architecture, potentially leading tocognitive decline in older age. However, the mechanisms responsible for alterations in functionalbrain architecture remain poorly understood. LÄS MER