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04 September 2016 : Clinical Research  

Association of Electroencephalography (EEG) Power Spectra with Corneal Nerve Fiber Injury in Retinoblastoma Patients

Jianliang LiuBCDE, Juanjuan SunBCF, Yumei DiaoADG, Aijun DengBCF

DOI: 10.12659/MSM.897050

Med Sci Monit 2016; 22:3135-3139

Abstract

BACKGROUND: In our clinical experience we discovered that EEG band power may be correlated with corneal nerve injury in retinoblastoma patients. This study aimed to investigate biomarkers obtained from electroencephalography (EEG) recordings to reflect corneal nerve injury in retinoblastoma patients.

MATERIAL AND METHODS: Our study included 20 retinoblastoma patients treated at the Department of Ophthalmology, Affiliated Hospital of Weifang Medical University between 2010 and 2014. Twenty normal individuals were included in the control group. EEG activity was recorded continuously with 32 electrodes using standard EEG electrode placement for detecting EEG power. A cornea confocal microscope was used to examine corneal nerve injury in retinoblastoma patients and normal individuals. Spearman rank correlation analysis was used to analyze the correlation between corneal nerve injury and EEG power changes. The sensitivity and specificity of changed EEG power in diagnosis of corneal nerve injury were also analyzed.

RESULTS: The predominantly slow EEG oscillations changed gradually into faster waves in retinoblastoma patients. The EEG pattern in retinoblastoma patients was characterized by a distinct increase of delta (P<0.01) and significant decrease of theta power P<0.05). Corneal nerves were damaged in corneas of retinoblastoma patients. Corneal nerve injury was positively correlated with delta EEG spectra power and negatively correlated with theta EEG spectra power. The diagnostic sensitivity and specificity by compounding in the series were 60% and 67%, respectively.

CONCLUSIONS: Changes in delta and theta of EEG appear to be associated with occurrence of corneal nerve injury. Useful information can be provided for evaluating corneal nerve damage in retinoblastoma patients through analyzing EEG power bands.

Keywords: Cornea - pathology, Child, Preschool, Child, Corneal Injuries - diagnosis, Delta Rhythm, Electroencephalography - methods, Nerve Fibers - pathology, Retinoblastoma - pathology, Theta Rhythm

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750