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  • 1
    ISSN: 1590-3478
    Keywords: Visual evoked potentials ; VEP ; Optic neuritis ; Multiple sclerosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario I 20 pazienti affetti da Neurite Ottica (NO), descritti nel precedente lavoro [23] sono stati sottoposti a registrazioni seriali multicanali dei Potenziali Evocati Visivi (PEV), per un periodo di 2 anni dall'esordio della NO. I PEV potevano correlare con le lesioni evidenziate con la Risonanza Magnetica, con le alterazioni campimetriche e con altri reperti clinici. Basandoci sulla loro distribuzione in mappa, i PEV sono stati classificati come realmente “ritardati” e “pseudo-ritardati”. PEV realmente “ritardati” potevano essere registrati all'esordio, o precocemente dopo l'episodio di NO, e la presenza del “ritardo” stava ad indicare un recupero della funzione visiva e, quindi, una prognosi fausta. Gli “pseudo-ritardi” indicavano un'alterazione del campo visivo a prognosi non favorevole per un recupero della funzione visiva, a meno che entro i primi 3 mesi dalla NO si fosse verificata una ricomparsa di componenti normali o “ritardate”. Gli “pseudo-ritardi” erano rilievi caratteristici nei pazienti con lesioni maggiormente lunghe alle immagini LTE-STIR MRI [23]. Nessuna correlazione è stata trovata tra latenza dei PEV e lunghezza delle placche. I nostri rilievi sono in disaccordo con precedenti teorie relative ai tempi di instaurazione-recupero delle alterazioni di conduzione nella NO e nella Sclerosi Multipla.
    Notes: Abstract Twenty patients with optic neuritis (ON) described in the previous study [23] underwent serial VEP recordings (using multiple electrode arrays) for two years. The VEPs could be correlated with the lesions revealed by MRI, Visual Field tests and other clinical findings. On the basis of their scalp distribution, they were classified as “really delayed” VEPs and “pseudo-delayed” VEPs. Real delays could be recorded at the onset of ON or shortly afterwards, and their appearance indicated the recovery of visual function and a good prognosis. Pseudo-delays indicated an alteration in the visual field and, unless a breakthrough of normal or delayed components appeared in the first three months, following acute ON, indicate a poor prognosis for the recovery of visual function. The pseudo-delayed VEPs were mainly observed in patients with longer lesions revealed by means of LTE-STIR MRI [23]; there was no correlation between VEP latency and the length of plaques. Our findings contradict previous theories on the timing of conduction alterations in ON and multiple sclerosis.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 235 (1988), S. 238-240 
    ISSN: 1432-1459
    Keywords: Retrobulbar optic neuritis ; Guillain-Barré syndrome ; Visual evoked potentials ; Somatosensory evoked potentials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A case is reported in which retrobulbar neuritis preceded Guillain-Barré syndrome by 4 weeks. The visual evoked potential latencies were prolonged. After peripheral nervous system signs had cleared, median and peroneal somatosensory evoked potentials showed prolonged cervical N13, scalp N20 and L3-scalp conduction times.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1920
    Keywords: Key words Magnetic resonance imaging ; Optic neuritis ; Multiple sclerosis ; Visual evoked potentials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract MRI of the optic nerves was obtained in 13 patients with acute optic neuritis and 13 with a previous optic neuritis (ON), assessed by clinical features, visual fields and visual evoked potentials. Results of the conventional short tau inversion recovery (STIR) sequence obtained with a short echo time (STE-STIR; 22 ms) were compared with those of a long echo time (LTE-STIR: 80 ms) sequence. The conventional STE-STIR sequence revealed lesions in the optic nerves in 78.5 % of acute and 58.8 % of previous ON. The LTE-STIR sequence showed abnormalities in 92.8 % of acutely symptomatic nerves and 94.1 % of nerves with previous ON. The optic nerve lesions appeared significantly longer with the LTE-STIR sequence than with the conventional STE-STIR sequences, in both acute and previous ON.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1920
    Keywords: Magnetic resonance imaging ; Optic neuritis ; Multiple sclerosis ; Visual evoked potentials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract MRI of the optic nerves was obtained in 13 patients with acute optic neuritis and 13 with a previous optic neuritis (ON), assessed by clinical features, visual fields and visual evoked potentials. Results of the conventional short tau inversion recovery (STIR) sequence obtained with a short echo time (STE-STIR; 22 ms) were compared with those of a long echo time (LTE-STIR: 80 ms) sequence. The conventional STE-STIR sequence revealed lesions in the optic nerves in 78.5% of acute and 58.8% of previous ON. The LTE-STIR sequence showed abnormalities in 92.8% of acutely symptomatic nerves and 94.1% of nerves with previous ON. The optic nerve lesions appeared significantly longer with the LTE-STIR sequence than with the conventional STE-STIR sequences, in both acute and previous ON.
    Type of Medium: Electronic Resource
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