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Cutting communication with the brain by means of a surgical transection, or pharmacologically transecting the cord by slowly infusing a sodium channel blocker (lidocaine) rostral to a thoracic contusion, blocks pain-induced hemorrhage. These observations suggest that the adverse effect of pain after SCI depends on supraspinal (brain) systems. We hypothesize that inhibiting brain activity using a general anesthetic (e.g., pentobarbital, isoflurane) should have a protective effect. The present study shows that placing rats in an anesthetic state with pentobarbital or isoflurane 24\u2009h after a lower thoracic contusion injury blocks pain-induced intraspinal inflammation and hemorrhage when administered before pain. Pentobarbital also extends protective effects against locomotor deficits produced by noxious stimulation. Inducing anesthesia after noxious stimulation, however, has no effect. Similarly, subanesthetic dosages of pentobarbital were also ineffective at blocking pain-induced hemorrhage. Also examined were the hemodynamic impacts of both pain and anesthetic delivery after SCI. Peripheral pain-input induced an acute increase in systolic blood pressure; isoflurane and pentobarbital prevent this increase, which may contribute to the protective effect of anesthesia. The results suggest that placing patients with SCI in a state akin to a medically induced coma can have a protective effect that blocks the adverse effects of pain.<\/jats:p>","DOI":"10.1089\/neu.2022.0449","type":"journal-article","created":{"date-parts":[[2023,2,14]],"date-time":"2023-02-14T03:04:19Z","timestamp":1676343859000},"page":"2552-2565","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":6,"title":["General Anesthesia Blocks Pain-Induced Hemorrhage and Locomotor Deficits After Spinal Cord Injury in Rats"],"prefix":"10.1177","volume":"40","author":[{"given":"Jacob A.","family":"Davis","sequence":"first","affiliation":[{"name":"Cellular and Behavioral Neuroscience, Department of Psychology, Texas A&amp;M University, College Station, Texas, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne C.","family":"Bopp","sequence":"additional","affiliation":[{"name":"Cellular and Behavioral Neuroscience, Department of Psychology, Texas A&amp;M University, College Station, Texas, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Melissa K.","family":"Henwood","sequence":"additional","affiliation":[{"name":"Cellular and Behavioral Neuroscience, Department of Psychology, Texas A&amp;M University, College Station, Texas, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paris","family":"Bean","sequence":"additional","affiliation":[{"name":"Cellular and Behavioral Neuroscience, Department of Psychology, Texas A&amp;M University, College Station, Texas, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James W.","family":"Grau","sequence":"additional","affiliation":[{"name":"Cellular and Behavioral Neuroscience, Department of Psychology, Texas A&amp;M University, College Station, Texas, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2023,11,30]]},"reference":[{"key":"e_1_3_4_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.pain.2014.08.034"},{"key":"e_1_3_4_3_2","doi-asserted-by":"publisher","DOI":"10.3389\/fncir.2014.00100"},{"key":"e_1_3_4_4_2","doi-asserted-by":"publisher","DOI":"10.1089\/neu.2004.21.1795"},{"key":"e_1_3_4_5_2","doi-asserted-by":"publisher","DOI":"10.3389\/fnsys.2019.00044"},{"key":"e_1_3_4_6_2","doi-asserted-by":"publisher","DOI":"10.3389\/fnsys.2018.00027"},{"key":"e_1_3_4_7_2","doi-asserted-by":"publisher","DOI":"10.3389\/fnsys.2019.00044"},{"key":"e_1_3_4_8_2","unstructured":"National spinal cord injury statistical center. 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