There is no diagnostic test. Investigations only support the clinical suspicion. Neurophysiological: may detect a second asymptomatic lesion (see page 52).
1. Visual evoked potential (VEP). In optic nerve involvement the latency of the large positive wave is delayed beyond 110 msec. The amplitude of the waves may also be reduced.
2. Somatosensory evoked response (SSEP) may detect central sensory pathway lesions.
3. Brain stem auditory evoked potential (BAEP) may detect brain stem lesions.
Normal response - latency <110 msec
Abnormal response latency prolonged.
Was this article helpful?
This guide will help millions of people understand this condition so that they can take control of their lives and make informed decisions. The ebook covers information on a vast number of different types of neuropathy. In addition, it will be a useful resource for their families, caregivers, and health care providers.