Photo-evoked eyelid microvibration in newborn infants and children--reflex arc and maturational change.
We studied maturational process of the photo-evoked eyelid microvibration (PEMV) in 166 newborns, 72 children and 10 adults free of any neurologic disorders. The results indicate that the latency of PEMV shortens during growth due to the myelination of the nerve fibers of the involved pathway. Age-related normal values were established. The pathway of PEMV probably consists of retina, optic nerve, pretectum, facial nerve, and orbicularis oculi muscle. We also evaluated the effect on this reflex of retinoblastoma, facial nerve paralysis, holoprosencephaly anomalad, and a muscle relaxant used for artificial respiration in respiratory distress syndrome.
Yasuhara
A
A
Hori
A
A
Kobayashi
Y
Y
D001767:Blinking / Q000502:physiology*; D005143:Eyelids / Q000502:physiology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D010775:Photic Stimulation; D011930:Reaction Time; D012890:Sleep; D014732:Vibration