Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic...

Area of Science:

• Neuroscience
• Cognitive Science
• Neuromodulation

Background:

• Understanding brain area interactions is crucial for goal-directed behavior.
• Functional neuroimaging reveals brain connectivity but lacks causal evidence.
• Transcranial magnetic stimulation (TMS) offers noninvasive brain activity modification.

Purpose of the Study:

• To highlight advances in dual-site TMS for probing cortico-cortical interactions.
• To describe a dual-site TMS protocol for enhancing synaptic efficiency.
• To explore the potential of these methods for understanding cognitive-motor function and neurological disorders.

Main Methods:

• Utilized a paired-pulse, dual-site TMS technique with two coils.
• Applied this method to causally probe cortico-cortical interactions in the motor system.
• Described a dual-site TMS protocol based on cortical paired associative stimulation (cPAS) to enhance synaptic efficiency.

Main Results:

• Demonstrated the ability of dual-site TMS to causally investigate cortico-cortical interactions.
• Showcased the enhancement of synaptic efficiency in interconnected brain areas using cPAS.
• Provided insights into the mechanisms of cognitive-motor function.

Conclusions:

• Dual-site TMS methods offer a causal approach to studying brain connectivity.
• These techniques can enhance understanding of cognitive-motor functions.
• Potential applications include targeted neural pathway manipulation for improved behavior and treatment of neurological/psychiatric disorders.