Towards neural circuit reconstruction with volume electron microscopy techniques.

Area of Science:

• Neuroscience
• Neuroanatomy
• Electron Microscopy

Background:

• Electron microscopy (EM) offers the necessary resolution to trace individual axons and dendrites in complex neural tissue.
• Reconstructing neural circuits from EM data has been historically challenging due to the extensive serial sectioning and reconstruction required for large volumes.

Purpose of the Study:

• To highlight recent technological advancements in volume electron microscopy.
• To discuss the potential for reconstructing complete neural wiring diagrams.
• To explore the renewed possibility of correlating neural function with neuroanatomical circuitry.

Main Methods:

• Utilizing high-resolution electron microscopy for imaging neural tissue.
• Employing automated acquisition techniques to streamline data collection.
• Developing methods for serial sectioning and reconstruction of large neural volumes.

Main Results:

• Significant improvements in the quality of volume electron microscopy data have been achieved.
• Automation of data acquisition has drastically reduced the labor involved in EM reconstruction.
• The prospect of reconstructing nearly complete invertebrate and substantial vertebrate nervous systems is now feasible.

Conclusions:

• Technological progress in electron microscopy is overcoming previous limitations in neural circuit reconstruction.
• The ability to generate comprehensive neural wiring diagrams opens new avenues for understanding brain function.
• This work revives the classical approach of linking neural circuits directly to their functional roles.