Radiosurgery for Essential Tremor and Parkinson’s Disease in Central America
Learn how radiosurgery for essential tremor and movement disorders offers a minimally invasive treatment alternative for patients with symptoms that become resistant to medication.
Movement disorders, such as essential tremor and Parkinson’s disease, affect millions of people worldwide and can significantly limit quality of life.
Symptoms such as tremor, stiffness, and slowness of movement can make daily activities like writing, eating, dressing, or walking more difficult. Although medications remain the first line of treatment, some patients eventually develop symptoms that become resistant to pharmacological therapy.
In these cases, functional neurosurgery offers important therapeutic alternatives. One of the most precise minimally invasive options is stereotactic radiosurgery, which allows physicians to treat deep brain structures involved in abnormal motor circuits.
In Central America, the Centro Internacional de Cáncer (CIC) in El Salvador, led by neurosurgeon Dr. Eduardo Lovo, offers advanced radiosurgery treatments for movement disorders. The program is certified by the International Stereotactic Radiosurgery Society (ISRS).
What are essential tremor and Parkinson’s disease?
Essential tremor
Essential tremor is the most common movement disorder. It causes rhythmic tremor, mainly in:
- the hands
- the head
- the voice
The tremor usually appears during voluntary movements, such as writing or holding objects.
Parkinson’s disease
Parkinson’s disease is a progressive neurodegenerative disorder that affects the brain circuits responsible for movement control.
The most common symptoms include:
- resting tremor
- muscle rigidity
- slowness of movement
- balance problems
Although medications such as levodopa can improve symptoms, many patients experience a reduced response to treatment over time.
Functional radiosurgery for movement disorders
Stereotactic radiosurgery can treat movement disorders by applying highly focused radiation to specific structures deep within the brain.
The most common target is the ventral intermediate nucleus (VIM) of the thalamus, a key structure in the circuits responsible for tremor.
Using high-precision systems such as Gamma Knife, radiation is directed to this small deep brain target. The radiation produces functional changes in the motor circuit, reducing tremor intensity.
Main advantages
- non-invasive treatment
- no surgical incision
- outpatient procedure
- high precision at the target
Radiosurgical thalamotomy
Radiosurgical thalamotomy consists of creating a precise functional lesion in the VIM nucleus of the thalamus. This nucleus acts as a relay point within the motor circuit connecting the cerebellum, thalamus, and cerebral cortex.
When abnormal signals circulate through this circuit, tremor occurs. By modifying this pathway through radiosurgery, it is possible to reduce tremor amplitude and improve motor control.
Radiosurgical thalamotomy may be especially useful for patients who:
- do not respond adequately to medication
- are not candidates for open surgery
- prefer a non-invasive therapeutic option
Specialized center for functional radiosurgery in Central America
The Centro Internacional de Cáncer in San Salvador has developed a specialized program in functional radiosurgery and the treatment of movement disorders.
The program led by Dr. Eduardo Lovo integrates:
- neurosurgery
- stereotactic radiosurgery
- neuroradiology
- multidisciplinary neurological evaluation
This approach allows the center to treat patients from across Central America, including:
- El Salvador
- Honduras
- Guatemala
- Nicaragua
- Costa Rica
International ISRS certification
The International Stereotactic Radiosurgery Society (ISRS) promotes international standards of excellence in radiosurgery.
The certification program evaluates:
- clinical experience
- precision in treatment planning
- radiation safety
- quality control
The Centro Internacional de Cáncer in El Salvador holds ISRS certification, positioning it within the international network of accredited centers.
Key facts about radiosurgery for essential tremor and Parkinson’s
Frequently asked questions about functional radiosurgery
Is radiosurgery used for essential tremor?
Yes. In selected patients with medication-resistant essential tremor, stereotactic radiosurgery can target the VIM nucleus of the thalamus to help reduce tremor intensity.
Does radiosurgery for movement disorders require opening the skull?
No. Stereotactic radiosurgery is a non-invasive procedure that uses highly focused radiation without a surgical incision.
What is radiosurgical thalamotomy?
It is a functional radiosurgery technique that creates a precise lesion in the VIM nucleus of the thalamus, a structure involved in the brain circuits responsible for tremor.
Who may be a candidate for radiosurgery for tremor?
Some patients who do not respond adequately to medication, are not candidates for open surgery, or prefer a non-invasive option may be considered. The indication should be defined through specialized neurological and neurosurgical evaluation.
Where can patients receive functional radiosurgery in Central America?
The Centro Internacional de Cáncer in San Salvador, El Salvador, offers a functional radiosurgery program led by Dr. Eduardo Lovo and holds ISRS certification.
Conclusion
Stereotactic radiosurgery represents a precise, minimally invasive therapeutic alternative for patients with essential tremor and Parkinson’s disease, especially when medications become less effective.
The Centro Internacional de Cáncer, led by Dr. Eduardo Lovo, has become a reference center in Central America for the treatment of neurological disorders through advanced radiosurgery, maintaining international standards recognized by the ISRS.
Centro Internacional de Cáncer
Advanced functional radiosurgery in El Salvador for patients throughout Central America.
