Parkinson's disease is a progressive neurological disorder that affects motor function. It is often characterised by tremors, rigidity, slowed movement, and instability. While medication has traditionally been the first line of treatment, neurosurgery is playing an increasingly important role. This is particularly the case in the later stages of the disease, when medications become less effective. In this blog, we will delve deeper into the role of neurosurgery in treating Parkinson's disease, the different surgical approaches, and how these techniques can improve patients' lives.
Parkinson's disease is a progressive neurological disorder that affects the nervous system, particularly in the brain. It primarily impacts motor skills, causing symptoms such as tremors, stiffness, slowness of movement, and problems with balance and coordination.
Parkinson's disease is a neurodegenerative disorder that mainly affects older adults. It occurs when nerve cells in a part of the brain, the basal ganglia, Pass away. These cells are responsible for producing dopamine, a neurotransmitter that is essential for the coordination of movement. When dopamine production decreases, the characteristic symptoms of Parkinson's disease arise, such as tremors (resting tremor), muscle stiffness, slow movement, and instability.
Although medications, such as levodopa (L-dopa), can often temporarily alleviate symptoms, patients find that these medications lose their effectiveness over time. This is where Neurosurgery play a role.
Neurosurgery as a treatment for Parkinson's disease
Neurosurgery is not recommended for everyone with Parkinson's disease, but for certain patients, it can play an important role in improving their symptoms and quality of life. There are different neurosurgical techniques which are applied to modulate brain activity and alleviate Parkinson's symptoms.
1. Deep Brain Stimulation (DBS)
The most commonly used and well-known neurosurgical procedure for Parkinson's is Deep Brain Stimulation (DBS). DBS is a minimally invasive procedure in which a doctor implants electrodes in specific parts of the brain involved in motor control, such as the globus pallidus internus or the subthalamic nuclei. These electrical impulses help to to normalise the abnormal brain activity which causes Parkinson's symptoms like tremors and stiffness. One of the major advantages of DBS is that the stimulation can be adjusted at any time, meaning the doctor can tailor the intensity and frequency of the stimulation to the patient's needs.
Advantages of Deep Brain Stimulation:
- Reduces the need for medication, which often leads to fewer side effects from medicines.
- Reduction of motor symptoms such as tremors, stiffness, and slowness of movement.
- Minimal side effects, especially when compared to other surgical treatments.
Deep brain stimulation is suitable when it can help manage the motor symptoms of Parkinson's disease, essential tremor, and dystonia, and when medications are no longer sufficiently effective or cause bothersome side effects. It is also suitable for treating certain neurological conditions like epilepsy.
It is generally recommended for patients who:
- Experiencing severe motor symptoms that do not respond well to medication.
- Suffering from uncomfortable or uncontrollable side effects of medication (such as involuntary movements).
- To be in good general health and not show any serious cognitive decline.
2. Pallidotomy and Thalamotomy
Although it is applied less often than Deep Brain Stimulation nowadays, procedures such as Pallidotomy and Thalamotomy can sometimes be useful. This is the case for patients with Parkinson's who are not eligible for or do not benefit from Deep Brain Stimulation.
- Pallidotomy entails that a specific part of the brain, the globus pallidus, is hot. This is done to relieve abnormal nerve activity, which causes tremors and stiffness. This is usually done using a technique called radiofrequency ablation is called.
- Thalamotomy is a procedure where a small area of the thalamus is destroyed to relieve tremors. This is sometimes used in patients who are primarily suffering from tremor. This is much less common than Deep Brain Stimulation.
These techniques can help reduce tremors and improve motor control. They are nowadays less frequently used due to the effectiveness of Deep Brain Stimulation and the risks of damage to other brain structures.
3. Genetic Surgery and Gene Therapy (under development)
Another promising approach to neurosurgery in Parkinson's is genetic surgery. This concerns the use of gene therapy to genetically modify the brain so that it can continue to produce dopamine or to improve other brain processes. Although this is still an experimental field, research is being conducted worldwide to further develop these techniques.
When is neurosurgery considered for Parkinson's?
Neurosurgical treatments are generally considered in the following situations:
- Medication isn't working well enoughWhen the illness is progressive and medication becomes less effective.
- Uncontrollable side effects of medicationWhen patients experience severe side effects from medications that reduce quality of life, such as involuntary movements.
- Significant impact on quality of lifeWhen the motor symptoms of Parkinson's significantly affect daily life and the patient is unable to perform normal activities.
Conclusion
Neurosurgery plays an increasingly important role in the treatment of Parkinson's disease, especially when medication is no longer sufficient to control the symptoms. Treatments such as Deep Brain Stimulation have the potential to drastically improve the quality of life for many patients by reducing symptoms such as tremors, rigidity, and slow movement.
Neurosurgery does not offer a cure for Parkinson's, but it offers patients in advanced stages of the disease new hope and better control over their condition. However, it is important to emphasize that neurosurgical procedures must be carefully considered and that not all patients are suitable candidates for these treatments.
You are always welcome for a consultation with one of our neurosurgeons for further advice!