Quantifying insertional effects in deep brain stimulation: clinical outcomes and neurophysiological mechanisms

Area of Science:

• Neuromodulation
• Neurosurgery
• Neuroscience

Background:

• Deep brain stimulation (DBS) is a transformative therapy for neurological and psychiatric conditions.
• The simple act of implanting DBS electrodes can trigger immediate clinical and molecular responses, known as insertional effects.
• These effects are often overlooked but significantly impact treatment outcomes.

Purpose of the Study:

• To review the clinical manifestations of DBS insertional effects across various disorders.
• To explore the underlying molecular and cellular mechanisms driving these immediate responses.
• To discuss the implications of insertional effects for optimizing DBS therapies and developing advanced systems.

Main Methods:

• A comprehensive literature search was performed.
• Studies documenting immediate clinical benefits post-DBS implantation were analyzed.
• Molecular and cellular mechanisms, including neuroinflammation and ion channel dynamics, were investigated.

Main Results:

• Insertional effects are observed in Parkinson's disease, epilepsy, chronic pain, and psychiatric disorders.
• Mechanisms involve neuroinflammatory responses and altered ion channel activity.
• These effects show potential for predicting DBS efficacy and informing closed-loop systems.

Conclusions:

• Insertional effects are a critical, underappreciated aspect of DBS.
• Harnessing these effects can lead to personalized and more effective neuromodulation strategies.
• Further understanding will advance DBS technology and improve patient treatment for diverse disorders.