Parkinson’s Disease and DBS: Why the Neurologist and the Neurosurgeon Are Both Essential

Parkinson’s disease is one of the most commonly misunderstood conditions in neurology. Most people know it causes tremors and that medication helps manage it. What is far less understood is the trajectory the condition follows over time and the point at which a surgical option becomes not just available but the most appropriate next step.

That point is where the roles of the neurologist and the neurosurgeon converge in a way that is clinically specific and not interchangeable.

Dr. Gurneet Singh Sawhney, a Best Neurosurgeon with specialist training in functional neurosurgery and Deep Brain Stimulation from Tokyo Women’s Medical University, brings the surgical dimension of this care. Recognised on leading healthcare platforms including Practo and Clinicspots, Dr. Gurneet Singh Sawhney has performed DBS procedures as part of a broader practice spanning brain tumour surgery, epilepsy surgery, and spinal cord stimulation.

What makes DBS effective, however, is not surgical implantation alone. The pathway to surgery, candidate selection, and ongoing device management after implantation require expertise rooted in movement disorders neurology rather than surgical technique.

Dr. Guruprasad Hosurkar, a Best Neurologist and Director of Neurology specialising in Parkinson’s disease and movement disorders, occupies this critical clinical space. Listed on Practo and Clinicspots, Dr. Guruprasad Hosurkar leads a movement disorders programme that includes DBS candidate evaluation and the programming and long-term management of the device following implantation.

What Parkinson’s Does Over Time

Parkinson’s disease results from the progressive loss of dopamine-producing neurons in the substantia nigra. As dopamine declines, tremor, rigidity, slowed movement, and postural instability gradually worsen.

In early stages, levodopa manages symptoms effectively. Over time, the therapeutic window narrows. Motor fluctuations emerge, periods of good control alternating with poor control. Dyskinesias, involuntary movements from long-term levodopa use, become a significant problem. Adjusting doses becomes increasingly difficult. This is when the DBS conversation appropriately begins.

What DBS Involves

Deep Brain Stimulation involves implanting electrodes in specific brain targets, most commonly the subthalamic nucleus or globus pallidus interna. These connect to a pulse generator placed under the skin, delivering continuous electrical stimulation that modulates the abnormal neural activity driving Parkinson’s motor symptoms.

DBS is not a cure. Neurodegeneration continues. But for the right patient at the right stage, it can restore the quality of life that medication alone can no longer maintain. Adaptive closed-loop DBS systems, which respond in real time to the patient’s own neural signals, represent the current frontier, producing more precise symptom control than conventional systems.

The Neurologist’s Role

Patient selection is the most consequential phase. DBS produces the best outcomes in patients whose symptoms respond clearly to levodopa, even if the window has become unpredictable. A formal levodopa challenge assessed by a movement disorders neurologist identifies suitable candidates. Patients with significant cognitive impairment or atypical features may not be appropriate, and these distinctions require deep subspecialty expertise.

Following surgery, the neurologist programs stimulation parameters: which electrode contacts are active, at what amplitude, frequency, and pulse width. This programming typically takes months to optimise and requires periodic adjustment as the patient’s needs evolve. The quality of this ongoing management is a primary determinant of long-term outcomes.

The Neurosurgeon’s Role

The neurosurgeon implants the electrodes with the precision the procedure demands. Target structures are small, and even a few millimetres of deviation can reduce efficacy or introduce unwanted effects, including speech changes or balance disturbance.

Advances in stereotactic imaging and intraoperative neurophysiological monitoring have improved accuracy substantially. Experience with the specific procedure and DBS case volume directly influences outcomes. This is not a domain where general neurosurgical expertise substitutes for subspecialty experience.

Why Both Are Essential

DBS cannot succeed on surgical expertise alone. Candidate selection, pre-operative optimisation, post-operative programming, and long-term neurological management all require sustained involvement from a movement disorders specialist. Equally, the most thorough neurological assessment cannot translate into benefit without a surgeon capable of placing electrodes accurately.

Patients considering DBS should expect both disciplines to work in genuine coordination throughout their care pathway.

Frequently Asked Questions

1. Who qualifies for DBS surgery?

 Patients with confirmed Parkinson’s disease, a clear levodopa response, and significant motor fluctuations or dyskinesias that medication can no longer adequately control.

2. Does DBS cure Parkinson’s disease?

 No. It manages motor symptoms by modulating abnormal neural activity. The underlying disease continues to progress but is often far more manageable following successful DBS.

3. How long does the DBS benefit last?

 Studies show sustained benefit for up to ten years and beyond in appropriately selected patients, with continued programming adjustments along the way.

4. What is adaptive closed-loop DBS?

 Unlike conventional DBS with fixed stimulation parameters, adaptive systems sense the patient’s neural signals in real time and adjust stimulation automatically for more personalised control.

5. What if DBS does not produce the expected benefit?

 The evaluation focuses on electrode placement accuracy, whether programming has been fully explored, and whether candidacy was appropriate. Systematic neurologist-led programming optimisation is central to addressing suboptimal outcomes.