Memory’s building blocks are more diverse than thought
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Researchers at Carnegie Mellon University discovered that dendritic spines, the structures in the brain responsible for communication between neurons and forming memories, are more varied than previously understood.
For years, scientists grouped these spines into categories like “mushroom,” “thin,” and “stubby.” However, the Carnegie Mellon team found these structures exist on a continuous range of shapes and are constantly changing with neural activity.
The team, led by professors Jessica Zhang and Phil LeDuc, created a computational framework to analyze spine morphology. They examined numerous features from microscopy images, including shape and image intensity, to create detailed descriptions. This framework allows researchers to move beyond rigid classifications and recognize that spines can exhibit characteristics of multiple groups at once. This new understanding could improve the detection of neurological diseases.
Abnormalities in spine shape and density are linked to conditions such as Alzheimer’s disease, schizophrenia, and Down syndrome. A more nuanced classification system may help clinicians identify early signs of these diseases. The researchers believe their framework can also be applied to other areas of biology where continuous variation exists in biological structures.
