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

Ying Hui Yu; W. W. Blessing

doi:10.1016/S0304-3940(98)00717-4

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

Ying Hui Yu, W. W. Blessing

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	172-174
Number of pages	3
Journal	Neuroscience letters
Volume	255
Issue number	3
DOIs	https://doi.org/10.1016/S0304-3940(98)00717-4
Publication status	Published - 23 Oct 1998

Keywords

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

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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.",

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AU - Blessing, W. W.

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N2 - 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.

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KW - Nociceptive stimulation

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

Abstract

Keywords

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