Constriction of the ear pinna vascular bed accompanies the trigeminal depressor response in rabbits

Ying Hui Yu, W. W. Blessing

    Research output: Contribution to journalArticlepeer-review

    18 Citations (Scopus)

    Abstract

    Electrical stimulation of the spinal tract of the trigeminal nerve at 5 Hz to elicit the trigeminal depressor response in anesthetized rabbits also causes an acute fall in ear pinna blood flow to near zero levels (from 31 ± 8 to 2 ± 2 kHz, n = 5, P < 0.01). This active vasoconstriction in the ear artery contrasts with the active vasodilation in femoral, renal and mesenteric arteries known to be part of the trigeminal depressor response. The selective vasoconstriction observed in the ear bed in response to noxious stimulation in anesthetized rabbits is similar to the vigorous acute vasoconstriction occurring in this cutaneous bed in conscious rabbits responding to salient environmental stimuli.

    Original languageEnglish
    Pages (from-to)172-174
    Number of pages3
    JournalNeuroscience letters
    Volume255
    Issue number3
    DOIs
    Publication statusPublished - 23 Oct 1998

    Keywords

    • Cardiovascular regulation
    • Cutaneous blood flow
    • Medulla oblongata
    • Nociceptive stimulation
    • Skin blood flow
    • Sympathetic nerves

    Fingerprint

    Dive into the research topics of 'Constriction of the ear pinna vascular bed accompanies the trigeminal depressor response in rabbits'. Together they form a unique fingerprint.

    Cite this