Fixation of Ultrasound Transducers for Spinal Cord Neuromodulation in Mice

Overview

This study presents an implantable fixation system for accurate ultrasound neuromodulation of the spinal cord in awake, freely moving mice. The method aims to facilitate chronic pain and spinal injury research by enabling precise, painless neuromodulation without the need for anesthesia.

Key Study Components

Area of Science

• Neuroscience
• Neuroengineering
• Pain research

Background

• Traditional methods of spinal ultrasound fixation in awake mice lacked stability.
• The study enhances approaches to neuromodulation for chronic pain conditions.
• Potential applications include motor function restoration after spinal injuries.

Purpose of Study

• To develop a novel fixation system for accurate spinal ultrasound stimulation.
• To enable chronic and repeatable neuromodulation in awake mice.
• To accelerate research into pain circuits and spinal injury repair.

Methods Used

• The study involves ultrasound neuromodulation techniques in vivo.
• The biological model includes awake, freely moving mice subjected to spinal interventions.
• Key surgical steps include hair removal, incision at the T13 vertebra, and attachment of custom fixation components.
• Ultrasound energy measurements and behavioral assessments (e.g., open field test) were conducted pre-and post-operation.

Main Results

• The protocol successfully addresses prior limitations in spinal ultrasound fixation.
• Ultrasound energy attenuation and maximum pressure changes were measured.
• Paw withdrawal latency was significantly altered following treatment, indicating effective neuromodulation.

Conclusions

• This innovative protocol demonstrates a reliable method for spinal ultrasound stimulation in awake mice.
• It paves the way for advanced studies in chronic pain and spinal injury repair.
• The findings are significant for understanding the mechanisms underlying spinal neuromodulation.

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