Respiratory responses to opiates applied to the medullary ventral surface.

Abstract:

:The participation of the medullary structures in the total respiratory effect of opiates was studied by restricting the access of the delta-agonist D-ala2-D-leu5-enkephalin and the mu-agonist D-ala2-Me-Phe4-Met (O) ol5-enkephalin, to the ventral medullary surface, and by comparing their responses with those induced after i.c.v. administration. The medullary structures were more resistant to the overall depressant action. The opioids in the medulla depressed preferentially the tidal volume and the CO2-responsivity whereas the i.c.v. injections affected severely the frequency. No qualitative differences were found between the effects of the delta- and mu-agonist. It is concluded that both, medullary and supramedullary structures are involved in the respiratory response to opiates, but they participate with unique functions in the overall respiratory effect.

journal_name

Life Sci

journal_title

Life sciences

authors

Flórez J,Hurlé MA,Mediavilla A

doi

10.1016/0024-3205(82)90115-1

subject

Has Abstract

pub_date

1982-11-15 00:00:00

pages

2189-92

issue

20-21

eissn

0024-3205

issn

1879-0631

pii

0024-3205(82)90115-1

journal_volume

31

pub_type

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