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Putamen Stiffness Declines with Age and Is Associated with Implicit Sequence Learning Outcomes.

Hyeon Jung Heselton1, Aaron T Anderson2, Curtis L Johnson3

  • 1Center for Brain, Biology and Behavior, University of Nebraska-Lincoln, Lincoln, NE 68588, USA.

Brain Sciences
|September 27, 2025
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Summary
This summary is machine-generated.

Stiffer putamen, measured by magnetic resonance elastography (MRE), is linked to better sequence learning in older adults. This suggests microstructural changes in the putamen contribute to age-related differences in learning abilities.

Keywords:
implicit learningmagnetic resonance elastographyputamensequence learningserial reaction time taskstiffnessvolume

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Biomedical Engineering

Background:

  • Sequence learning relies on the putamen, a brain structure that shrinks with age.
  • Age-related cognitive decline often includes reduced sequence learning.
  • Traditional imaging methods may not capture subtle structural changes related to learning.

Purpose of the Study:

  • To investigate the relationship between putamen structural integrity and sequence learning in aging adults.
  • To explore magnetic resonance elastography (MRE) as a sensitive measure of putamen microstructural integrity.
  • To determine if MRE measures of putamen stiffness correlate with sequence learning performance.

Main Methods:

  • Assessed sequence learning using the Serial Reaction Time Task in 61 healthy adults (45-78 years).
  • Measured putamen integrity via standard volume and MRE-based stiffness.
  • Analyzed correlations between putamen structure and learning performance.

Main Results:

  • Putamen volume and stiffness correlated with age, but not directly with sequence learning scores.
  • Putamen stiffness, measured by MRE, significantly correlated with higher sequence learning scores.
  • Control analyses confirmed the specificity of the putamen stiffness-learning relationship.

Conclusions:

  • Microstructural integrity of the putamen, particularly its stiffness, is associated with sequence learning abilities.
  • MRE offers a sensitive tool to detect age-related changes in the putamen linked to cognitive function.
  • Putamen microstructural changes may underlie age-related alterations in sequence learning outcomes.