07|2026
For decades, psychiatric medicine operated under a localization fallacy—a modern iteration of phrenology that mistakenly mapped complex mental health disorders to isolated, faulty brain regions. If a patient was depressed, the prevailing logic pointed to a sluggish prefrontal cortex. If they were anxious, the amygdala was entirely to blame.
Modern neuroimaging has shattered this pinpoint paradigm. We now understand that conditions like major depressive disorder (MDD), anxiety, obsessive-compulsive disorder (OCD), and addiction are rarely the result of a single neurological node going offline. Instead, they represent widespread dysregulation within the brain’s connectome. They are pathologies of communication, defined by imbalances across massive, interconnected neural networks.
By shifting our focus from isolated brain regions to large-scale network dynamics, we gain a much deeper appreciation for how mental illness takes root—and, crucially, why advanced neuromodulation technologies like BrainsWay’s Deep Transcranial Magnetic Stimulation (Deep TMS) are uniquely engineered to treat them.
The Orchestration of Consciousness: Three Pillars of Mood Regulation
To understand modern psychiatric interventions, one must first understand the architectural scaffolding of human cognition. Functional magnetic resonance imaging (fMRI) has revealed three dominant networks that dictate how we process emotion, direct our attention, and interpret reality.
1. The Central Executive Network (CEN): The Cognitive Conductor
Function: The CEN is the brain’s high-level manager. It governs executive functions—working memory, deliberate decision-making, sustained attention, and goal-directed behavior. When you are solving a complex math problem, planning your week, or actively suppressing an impulsive urge, your CEN is heavily engaged.
Primary Nodes: The dorsolateral prefrontal cortex (DLPFC) and the posterior parietal cortex.
Pathological Relevance: In patients with depression, the CEN is notoriously hypoactive. This under-activation manifests clinically as “brain fog,” profound indecisiveness, poor concentration, and cognitive sluggishness. In individuals battling addiction or substance use disorders, a compromised CEN results in severely impaired judgment and an inability to override impulsive cravings with rational foresight.
2. The Default Mode Network (DMN): The Ruminative Engine
Function: If the CEN is the brain’s active manager, the DMN is its idling engine. It is the network that activates when we are awake but not engaged in any specific external task. It governs daydreaming, autobiographical memory, self-reflection, and mind-wandering. It is the neurological seat of the “ego.”
Primary Nodes: The medial prefrontal cortex, posterior cingulate cortex, precuneus, and the hippocampus.
Pathological Relevance: While a healthy DMN is essential for self-awareness and creativity, a hyperactive DMN is heavily implicated in psychopathology. In major depression, an overactive DMN traps the patient in a relentless loop of negative self-focus and rumination. The brain becomes pathologically stuck in its own internal narrative. This excessive inward focus is equally destructive in OCD and post-traumatic stress disorder (PTSD), where intrusive thoughts and traumatic memories hijack the brain’s resting state.
3. The Salience Network (SN): The Neural Switchboard
Function: The brain cannot simultaneously direct total focus inward (DMN) and outward (CEN). It requires a switching mechanism to dictate which network should take priority based on environmental demands. That is the job of the Salience Network. It continually scans the environment and internal bodily states, determines what is immediately relevant (or “salient”), and toggles the brain’s activity between the DMN and CEN accordingly.
Primary Nodes: Anchored bilaterally in the anterior insula and the dorsal anterior cingulate cortex (dACC).
Pathological Relevance: When the SN dysregulates, the brain’s switching mechanism fails. In depression and schizophrenia, a faulty SN may fail to switch off the DMN during cognitive tasks, leaving the patient distracted and internally trapped. In anxiety and bipolar disorder, the SN may misinterpret benign external stimuli as highly threatening, triggering inappropriate, catastrophic emotional responses.
The Localization Fallacy: Why Pinpoint Neuromodulation Falls Short
Historically, transcranial magnetic stimulation (TMS) represented a massive leap forward in treating medication-resistant depression. By using magnetic fields to induce electrical currents in the brain, clinicians could awaken dormant neural tissue without the systemic side effects of pharmaceuticals.
However, first-generation traditional TMS relied heavily on the “figure-8” coil design. While effective for many, this technology had profound physical limitations. The magnetic field generated by a figure-8 coil provides highly focal, pinpoint stimulation. It targets a minuscule, superficial area of the cortex—penetrating only about 0.7 to 1.0 centimeters beneath the skull, encompassing a total brain volume of roughly .
Because psychiatric disorders are network-wide communication failures, targeting a single superficial node is often analogous to trying to fix a city’s congested traffic grid by repairing a single traffic light. It may help localized flow, but it rarely resolves the systemic gridlock. To truly alter the trajectory of severe mental illness, an intervention must reach deep enough, and spread wide enough, to modulate the entire network.
Deep TMS: Engineering a Network-Level Intervention
Recognizing the limitations of focal stimulation, BrainsWay developed Deep TMS, powered by a radically different, patented H-Coil architecture. Instead of treating the brain as a collection of isolated islands, Deep TMS is engineered to interact with the brain’s interconnected networks comprehensively.
The Architectural Advantages of the H-Coil
The distinction between traditional TMS and Deep TMS is not merely a matter of branding; it is a matter of biophysics and spatial neuroanatomy. The H-Coil fundamentally alters the shape, depth, and volume of the magnetic field introduced into the skull.
| Feature | First-Generation TMS (Figure-8) | Deep TMS (BrainsWay H-Coil) |
| Field Penetration | Superficial ( | Deep ( |
| Stimulation Volume | Highly Focal ( | Broad/Volumetric ( |
| Network Impact | Single superficial cortical node | Simultaneous, multi-node network modulation |
| Coil Design | Flat, rigid figure-8 wand | Helmet-integrated, contoured to the skull |
1. Deeper Penetration for Hidden Nodes
Many of the most critical nodes governing mood and addiction—particularly those regulating the DMN and SN—are buried deep within the brain’s architecture, safely tucked beneath the superficial cortex. The H-Coil’s unique winding pattern creates a magnetic field whose rate of decay is significantly slower than that of a figure-8 coil. This allows the therapeutic electromagnetic pulses to reach up to 2.5 times deeper into the neural tissue, successfully interacting with structures that traditional TMS simply cannot touch.
2. Broad-Spectrum Volumetric Stimulation
Rather than restricting energy to a single pinpoint, Deep TMS stimulates an area roughly . This expanded volume aligns perfectly with the wide-ranging architecture of the brain’s networks. By stimulating a broader swathe of tissue simultaneously, Deep TMS recruits a larger population of neurons, ensuring that the intervention captures the necessary network hubs to force a systemic “reboot.”
3. Restoring Systemic Equilibrium
Because Deep TMS engages multiple regions concurrently, it goes beyond merely activating a sluggish node. It forces the networks to “talk” to each other again. By modulating the hubs where the CEN, DMN, and SN intersect, the therapy helps restore the brain’s ability to smoothly transition from internal rest to external focus, breaking the pathological loops of rumination and sluggishness.
Clinical Translations: From Science to Symptom Relief
The H-Coil is not a static technology; its architecture can be mathematically altered to target different network dysfunctions based on the specific psychiatric condition being treated.
Major Depressive Disorder (The H1 Coil)
For MDD, BrainsWay utilizes the H1 Coil. While its primary physical target is the left dorsolateral prefrontal cortex (the dominant node of the Central Executive Network), its broad volumetric field ensures that the stimulation reverberates through the broader CEN-DMN-SN interplay. By deeply stimulating the CEN, it effectively strengthens the brain’s cognitive manager, giving it the leverage necessary to down-regulate the hyperactive, ruminative DMN.
Obsessive-Compulsive Disorder (The H7 Coil)
OCD presents a distinctly different network pathology, heavily involving the medial prefrontal cortex (mPFC) and the anterior cingulate cortex (ACC)—structures central to both the Default Mode and Salience networks. Traditional figure-8 coils struggle to reach the ACC due to its depth along the brain’s midline. The H7 Coil was explicitly designed to project its magnetic field straight down the medial longitudinal fissure, effectively reaching the ACC and mPFC to quiet the overwhelming “error signals” that drive compulsive behaviors.
Addiction and Smoking Cessation (The H4 Coil)
Substance use disorders severely hijack the brain’s reward circuitry and impair the CEN’s ability to exert inhibitory control. The H4 Coil is tailored to provide deep, bilateral stimulation to the prefrontal cortex and insula, actively modulating the Salience Network to reduce cue-induced cravings while simultaneously strengthening executive oversight.
Rewiring the Future
Patients suffering from treatment-resistant depression, severe OCD, or relentless addiction are rarely battling a single localized brain injury. They are enduring a systemic failure of coordination between the networks that generate human consciousness.
Understanding the brain through the lens of connectomics allows clinicians to move definitively away from one-size-fits-all, superficial approaches. By recognizing that mental health requires a symphony of communication between the Central Executive, Default Mode, and Salience networks, the mandate for modern psychiatric technology becomes clear. BrainsWay’s Deep TMS represents the vanguard of this neuro-technological shift—offering a verified, non-invasive method to reach deeper, stimulate broader, and physically rewire the networks that shape our reality.
Colorado TMS Services provides therapy for individuals dealing with mental health challenges, relationship and marriage issues, and substance use disorders. Our services include BrainsWay deep-TMS therapy, as well as NeuroStar TMS for OCD. Proudly serving communities across Colorado. Call us today for more information at (303) 798-2196… Your Healing Begins Here.
Categories:: Depression