Cattle were placed either into social isolation in unfamiliar surroundings for 15 minutes, or remained in their home stalls with or without naloxone treatment to test whether endogenous opioid peptides were involved in the behavioral and physiological response of the cattle to stress. Naloxone in the home stall increased cortisol concentrations in the blood. It also tended to decrease the response latency to local thermal stimulation of the leg by means of a laser (pain sensitivity), but did not induce vocalization. When the cattle were housed in social isolation, the incidence of high-frequency vocalization and defecation\/urination, heart rate, cortisol concentrations, and response latencies to the laser were increased. Prior administration of naloxone increased the incidence of low-frequency vocalization in isolation, but did not affect heart rate or response to the laser, and it had a limited effect on blood cortisol concentrations. It seems as though brief periods of social isolation in unfamiliar surroundings are stressful to the cow. This was indicated through increased heart rate, hypothalamic-pituitary-adrenocortical axis activity, and vocalization. Pain sensitivity is reduced when cattle are housed in isolation, suggesting a stress-induced analgesia, or pain reliever. However, no evidence of naloxone-sensitive opioid receptor involvement in these responses was found.<\/p>\n","protected":false},"excerpt":{"rendered":"
Cattle were placed either into social isolation in unfamiliar surroundings for 15 minutes, or remained in their home stalls with or without naloxone treatment to test whether endogenous opioid peptides were involved in the behavioral and physiological response of the cattle to stress. Naloxone in the home stall increased cortisol concentrations in the blood. It […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[928],"tags":[2133,8882,23389,65,45,20007,14804,12707,9053,10859,20754,16262,4599,3283,110,20911,1579,52,8742],"class_list":["post-5000","post","type-post","status-publish","format-standard","hentry","category-welfare","tag-activitycattlecortisolcowcowsdairy-cattledairy-cowdairy-cowsheart-ratehydrocortisonenaloxoneopioid-peptidespainphysiological-responseresponsestressthermalvocalization","tag-al","tag-analgesia","tag-behavior","tag-dairy","tag-gh","tag-hal","tag-isolation-of-dairy-opioid-peptides","tag-leg","tag-nat","tag-opioid-peptide-in-cattle","tag-pl","tag-stall","tag-stalls","tag-stress","tag-t","tag-test","tag-treatment","tag-vocal"],"_links":{"self":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/5000","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/comments?post=5000"}],"version-history":[{"count":0,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/5000\/revisions"}],"wp:attachment":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/media?parent=5000"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/categories?post=5000"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/tags?post=5000"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}