Objective: To investigate the retinal nerve fiber layer (RNFL) thickness in essential tremor (ET). Methods: Twenty-seven eyes of 27 patients with essential tremor were included in this study. Twentyseven eyes of 27 healthy volunteers served as controls. All eyes were examined with spectral domain optical coherence tomography (OCT) (Retinascan Advanced RS-3000; NIDEK, Gamagori, Japan) using image filling software program (NAVIS-EX, NIDEK, Tokyo, Japan). Results: No statistically significant difference was detected between ET patients and control group for overall (RNFL) and foveal retinal thickness parameters. [RNFL thickness (Average thickness p=0.86, superior average p=0.22, inferior average p=0.24, nasal average p=0.06, temporal average p=0.88), foveal retinal thickness p=0.63] There was no relationship between OCT parameters and age, gender and duration of ET (all p>0.05). Conclusion: We did not find altered RNFL and foveal thickness values in patients with ET compared to controls. Retinal thickness changes do not seem to be a potentially useful biomarker in ET patients.
Essential Tremor

No abstract available.
Dystonia* ; Essential Tremor* ; Tremor*

Essential Tremor ; Humans ; Pedigree

An increasing number of neurological conditions may be treated with high-intensity focused ultrasound (HIFU), among which is geared towards the control of tremors as seen in patients with Parkinson’s Disease (PD), X-linked Dystonia Parkinsonism (XDP), and Essential Tremor (ET). HIFU thalamotomy is a noninvasive therapy for neurological conditions with debilitating tremors despite medication. To improve treatment accuracy and patient safety, neurosurgeons, neurologists, and anesthesiologists must work together perioperatively.

A total of 30 patients detailing their demographics, symptoms, and perioperative anesthetic management in a tertiary government hospital in Metro Manila was reviewed from October 2021 to March 2024. Most of the patients were diagnosed as PD tremor dominant, followed by XDP and ET. Majority of the cases were done under minimal sedation with local infiltration on the pin site while the rest were done under monitored anesthesia care combined with local anesthesia. Specific anesthetic agents were given to provide comfort and pain relief and reduce the risk of side effects.

During sonication, an essential element of the procedure, patients were closely monitored for the anticipated effects, such as paresthesia, headache, nausea, and vomiting, and were managed accordingly. Postoperatively, these patients were reported to have decreased tremors, stable vital signs, and adequate pain control. Collaboration among healthcare providers is one of the important elements for a successful outcome. This study highlights the importance of personalized anesthetic management in enhancing patient outcomes and the need for future studies about developing anesthesia protocols and strategies.

No abstract available.
DNA, Mitochondrial* ; Essential Tremor* ; Humans

Primary writing tremor is considered to be a task-specific tremor occurring when handwriting. We describe the clinical and electrophysiological features of 5 patients. Two of the patients had a family history of the tremor. Alcohol was effective in reducing the tremor in 3 of the patients. Two patients showed a co-contraction and three alternate contractions between agonist and antagonist muscles. The frequency of the tremors was 5 to 6 Hz. Primidone and propranolol were effective in reducing tremor. Considering the clinical and electrophysiological features, it is suggested that primary writing tremor might be a variant of essential tremor. (J Korean Neurol Assoc 19(1):52~55, 2001
Essential Tremor ; Handwriting ; Humans ; Muscles ; Primidone ; Propranolol ; Tremor* ; Writing*

No abstract available.
DNA, Mitochondrial* ; Essential Tremor* ; Humans ; Parkinson Disease*

Adult ; Essential Tremor ; genetics ; Female ; Humans ; Male ; Middle Aged ; Pedigree

Adult ; Essential Tremor ; diagnosis ; Female ; Humans ; Male ; Pedigree

OBJECTIVE: Thalamic lesioning and deep brain stimulation(DBS) have proved to be beneficial to the treatment of essential tremor(ET). The authors compared the effects and complications of two modalities. METHODS: A total of 34 patients with ET were treated with ventral intermediate(Vim) nucleus thalamotomy or Vim DBS from May 1999 to May 2003. The procedure of lesioning or stimulation were performed as usual manner with or without microelectrode recording. Postoperatively, utilizing the various combinations of frequency, voltage and pulse width optimized the stimulation. The degree of improvements of tremor and the occurrence of the complications were evaluated postoperatively and at follow-up. RESULTS: There were 38 procedures, including 27 with Vim thalamotomy and 11 with DBS, in 34 patients. Of the thalamotomy group, left Vim lesioning is 25 and right one is 2. Follow-up duration ranged from 12 to 57 months. In the thalamotomy group, the rate of overall good outcome was 88.9% but 12 patients (44.4%) showed permanent adverse effects. In the cases of stimulation, the rate of overall good outcome was 90.9% and two patients had acceptable dysarthria. CONCLUSION: Both Vim thalamotomy and Vim DBS were effective for the treatment of ET, although perioperative adverse effects tended to be higher in patients who had thalamotomy. In cases of DBS, adjustments of stimulation parameters enabled an acceptable position to be achieved with tremor control and unwanted effects.
Brain ; Deep Brain Stimulation* ; Dysarthria ; Essential Tremor* ; Follow-Up Studies ; Humans ; Microelectrodes ; Tremor