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Related Concept Videos

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Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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Lifespan differences in cortico-striatal resting state connectivity.

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Frontal-striatal brain networks supporting cognition and motor skills show peak connectivity in young adulthood. Both cognitive and motor circuit connectivity is weaker in youth and older adults, following an inverted U-shaped pattern across the lifespan.

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Area of Science:

  • Neuroscience
  • Developmental Neuroscience
  • Cognitive Neuroscience

Background:

  • Cortico-striatal circuits are crucial for motor and cognitive functions.
  • Age-related differences in these circuits are linked to cognitive decline.
  • Youth exhibit mature motor networks but developing cognitive networks.

Purpose of the Study:

  • To investigate age-related changes in frontal-striatal cognitive and motor circuits.
  • To compare connectivity patterns across children, young adults, and older adults.
  • To test hypotheses of inverted U-shaped developmental trajectories for cognitive circuits.

Main Methods:

  • Resting-state functional connectivity analysis.
  • Examination of frontal-striatal circuits categorized as 'cognitive' and 'motor'.
  • Comparison of connectivity strength across three age groups: children/adolescents, young adults (YAs), and older adults (OAs).

Main Results:

  • Most cognitive and motor frontal-striatal areas showed higher connectivity in YAs compared to children and OAs.
  • Connectivity strength across the lifespan followed an inverted U-shaped pattern for both cognitive and motor circuits.
  • This suggests a general developmental trajectory for frontal-striatal network maturation and aging.

Conclusions:

  • Frontal-striatal cognitive and motor circuit connectivity peaks in young adulthood.
  • Connectivity is reduced in both younger (children/adolescents) and older adult populations.
  • These findings highlight age-related changes in brain network organization across the lifespan.