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 Scijournal_title
Life sciencesauthors
Flórez J,Hurlé MA,Mediavilla Adoi
10.1016/0024-3205(82)90115-1subject
Has Abstractpub_date
1982-11-15 00:00:00pages
2189-92issue
20-21eissn
0024-3205issn
1879-0631pii
0024-3205(82)90115-1journal_volume
31pub_type
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