Pathological circuit function underlying addiction and anxiety disorders.

Area of Science:

• Neuroscience
• Psychiatry
• Cellular Biology

Background:

• Current addiction and anxiety models implicate aberrant neural circuit function and remodeling.
• Synaptic plasticity is hypothesized to underlie pathological behaviors following disease-defining experiences like drug reward or stress.

Purpose of the Study:

• To review evidence supporting abnormal neuronal plasticity in addiction and anxiety.
• To emphasize the need for detailed functional anatomy of involved neural circuits.
• To guide future research toward identifying molecular mechanisms of disease-relevant plasticity.

Main Methods:

• Review of existing literature on neural circuits, synaptic plasticity, addiction, and anxiety.
• Focus on the functional diversity of neurons within implicated circuits.
• Discussion of optogenetics and other techniques for investigating neuronal function.

Main Results:

• The concept of "synaptic diseases" is gaining traction but lacks sufficient clinical validation.
• A comprehensive understanding of functional neuroanatomy is crucial for identifying disease mechanisms.
• Translational studies require establishing causality between plasticity and behavior.

Conclusions:

• Future research should prioritize detailed functional anatomy to identify molecular drivers of plasticity.
• Establishing causal links between neural function and behavior is essential for therapeutic development.
• Advanced techniques like optogenetics offer promising avenues for future research and potential treatments.