Author/Editor		Brecelj, J
Title		A VEP study of the visual pathway function in compressive lesions of the optic chiasm. Full-field versus half-field stimulation
Type		članek
Source		Electroencephalogr Clin Neurophysiol
Vol. and No.		Letnik 84, št. 3
Publication year		1992
Volume		str. 209-18
Language		eng
Abstract		Changes of the pattern reversal visual evoked potentials (VEPs) to half- and full-field stimulation in 50 patients with compressive lesions of the optic chiasm are presented. Temporal half-field stimulation yielded abnormal responses in 85 percent of the eyes, showing non-recordable P100 in 50 percent of eyes, while in 35 percent the P100 was significantly attenuated or delayed. With nasal half-field the percentage of all detectable abnormalities was lower (36 percent of the eyes). Full-field stimulation revealed VEP abnormalities in 74 percent of eyes and therefore proved less sensitive than the half-field stimulation. This study adds new evidence that half-field stimulation can be an important adjunct for assessing the function of the optic chiasm.
Descriptors		CRANIAL NERVE DISEASES EVOKED POTENTIALS, VISUAL NERVE COMPRESSION SYNDROMES OPTIC CHIASM ADOLESCENCE ADULT AGED CRANIAL NERVE DISEASES ELECTROENCEPHALOGRAPHY MIDDLE AGE NERVE COMPRESSION SYNDROMES PHOTIC STIMULATION REACTION TIME VISUAL ACUITY VISUAL FIELDS