Probing function in 3D neuronal cultures: A survey of 3D multielectrode array advances

Area of Science:

• Neuroscience
• Bioengineering
• Materials Science

Background:

• Microphysiological systems are advancing to model brain structures and monitor neural activity.
• Current technologies like 2D MEAs and optical imaging have limitations in spatial and temporal precision for neural network analysis.
• Three-dimensional multielectrode arrays (3D MEAs) are emerging to address these monitoring challenges in engineered tissues.

Purpose of the Study:

• To report on the design of novel three-dimensional multielectrode array (3D MEA) prototypes.
• To demonstrate the application of these 3D MEAs for probing neural activity within 3D neural tissue.
• To overcome technical challenges in monitoring the functionality of in vitro neural systems.

Main Methods:

• Development of novel 3D MEA prototypes utilizing either bottom-up or top-down design strategies.
• Implementation of 3D MEAs to achieve high spatial and temporal precision in monitoring neural activity.
• Application of 3D MEAs to probe neural network activity throughout engineered 3D neural tissue.

Main Results:

• Successful design and fabrication of 3D MEA prototypes capable of monitoring neural activity in three dimensions (X, Y, and Z).
• Demonstrated enhanced spatial and temporal precision compared to conventional 2D MEAs and optical imaging methods.
• Validated the application of 3D MEAs for comprehensive analysis of in vitro neural network function.

Conclusions:

• Novel 3D MEAs provide a significant advancement for monitoring neural activity in complex 3D engineered tissues.
• These 3D MEA prototypes offer a powerful tool for understanding neural network dynamics in vitro.
• The developed technology overcomes limitations of existing methods, paving the way for more accurate neural system analysis.