Low-Intensity Focused Ultrasound Neuromodulation in Psychiatric Disorders: Mechanisms, Models, and Missing Links

Area of Science:

• Neuroscience
• Neuromodulation
• Psychiatric Therapeutics

Background:

• Low-intensity focused ultrasound (FUS) is an emerging non-invasive neuromodulation technique.
• FUS offers precise, reversible deep brain stimulation, distinguishing it from other methods like TMS and DBS.
• It uniquely targets deep brain structures relevant to psychiatric disorders.

Purpose of the Study:

• To review the mechanisms of FUS at molecular, synaptic, and network levels.
• To assess the preclinical and early clinical evidence for FUS in psychiatric disorders.
• To identify challenges and opportunities for FUS as a psychiatric treatment.

Main Methods:

• Review of preclinical studies and early clinical evidence on FUS mechanisms.
• Analysis of FUS effects on molecular, synaptic, and network levels.
• Evaluation of FUS safety, efficacy, and technical challenges.

Main Results:

• FUS demonstrates potential for improving symptoms in major depressive, anxiety, and substance use disorders.
• Preliminary findings suggest FUS is safe, with effects persisting beyond sonication.
• Evidence indicates FUS can alter perfusion and neuronal excitability.

Conclusions:

• FUS shows promise as a neurocircuit-based treatment for psychiatric disorders.
• Further research is needed to optimize parameters and establish long-term efficacy.
• Addressing technical challenges is crucial for clinical translation and realizing FUS's therapeutic potential.