High-frequency component in flash visual evoked potentials in type 3 Gaucher disease.

Area of Science:

• Neuroscience
• Genetics
• Clinical Neurology

Background:

• Gaucher disease (GD) is a lysosomal storage disorder.
• Type 3 GD presents with neurological involvement, including progressive myoclonus epilepsy.
• Visual evoked potentials (VEP) assess visual pathway function.

Purpose of the Study:

• To characterize VEP findings in type 3 GD patients.
• To differentiate between type 3a (with epilepsy) and type 3b (without epilepsy) GD.
• To explore the utility of F-VEP and PR-VEP in assessing visual cortex excitability.

Main Methods:

• Retrospective review of flash visual evoked potentials (F-VEP) and somatosensory evoked potentials (SEP) in 5 patients with type 3 GD.
• Recording of pattern reversal visual evoked potentials (PR-VEP) in type 3a GD patients.
• Patients were undergoing enzyme replacement therapy.

Main Results:

• Averaged F-VEP showed high-frequency components at early latencies in most patients.
• PR-VEP showed no activity in the recorded type 3a GD patients.
• F-VEP amplitude was similar between type 3a and 3b GD, but SEP amplitude was higher in type 3a GD.

Conclusions:

• High-frequency components on F-VEP, particularly with a 10-200 Hz bandpass filter, may indicate augmented excitability in the visual cortex of type 3 GD patients.
• F-VEP may serve as a valuable tool for assessing neurological function in type 3 GD.
• Further research is warranted to validate these findings.