Corneal reflex latency in trigeminal nerve lesions.

Using a new technique to record the latency of the corneal reflex, we established normal values in 32 normal subjects between 10 and 80 years of age, divided into three age groups. In 15 patients with unilateral trigeminal nerve lesions, comparison of the responses on both sides permitted differentiation of afferent and efferent lesions.

A directional quantifying Doppler system for measurement of transport velocity of blood.

A transcutaneous Doppler device has been developed that measures primarily the directional transport velocity of blood, averaged over the vessel diameter, irrespective of its flow in adjacent vessels. Directional information is obtained by high or low-pass filtering of frequency converted versions of the received Doppler signals, applying low-cost, sharp filters in a superheterodyne system. Upper and lower channel signals are quantified separately to average directional velocity.