The corneal reflex and the R2 component of the blink reflex

A. Berardelli, G. Cruccu, M. Manfredi, J. C. Rothwell, B. L. Day, C. D. Marsden

Research output: Contribution to journalArticlepeer-review

Abstract

A reflex contraction of the human orbicularis oculi muscles can be evoked by stimulation of either the supraorbital region (“blink reflex”) or the cornea (“comeal reflex”). We found that the latency of the comeal reflex was longer, and the duration was longer than the R2 component of the blink reflex. The absolute refractory period of the R2 component of the blink reflex was longer after supraorbital than after comeal conditioning stimulation. When the R2 component of the blink reflex was habituated by repetitive stimuli, stimulation of the cornea still evoked a reflex, but supraorbital stimulation produced only a depressed R2 response. These findings suggest that the two reflexes do not have identical neural connections.

Original languageEnglish
Pages (from-to)797-801
Number of pages5
JournalNeurology
Volume35
Issue number6
Publication statusPublished - 1985

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Clinical Neurology
  • Neuroscience(all)

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