Degeneracy in hippocampal physiology and plasticity

Area of Science:

• Neuroscience
• Systems Biology
• Computational Biology

Background:

• Degeneracy, where diverse elements perform similar functions, is crucial for biological robustness and plasticity.
• Its role in encoding systems, balancing change for learning with stability for homeostasis, remains underexplored.

Purpose of the Study:

• To explore how degeneracy integrates into neural encoding systems, specifically the mammalian hippocampus.
• To investigate degeneracy's potential to reconcile the opposing demands of encoding new information and maintaining physiological stability.

Main Methods:

• Systematic review of evidence for degeneracy in hippocampal physiology and plasticity across multiple scales of analysis.
• Assessment of degeneracy as a framework for conjoint encoding and homeostasis.

Main Results:

• Evidence suggests degeneracy is expressed across multiple scales in the hippocampus.
• Biological complexity and multi-scale interactions may facilitate disparate routes for encoding and homeostasis.

Conclusions:

• Degeneracy provides a framework to achieve simultaneous encoding and homeostasis without conflict.
• Recognizing degeneracy reconciles seemingly contradictory observations in neural systems as alternate functional routes.