The relationship of epidural anesthesia to neural membranes and arachnoid villi.
D000328:Adult; D000368:Aged; D000767:Anesthesia, Epidural; D000818:Animals; D001099:Arachnoid / Q000033:anatomy & histology; D004388:Dura Mater / Q000033:anatomy & histology; D000882:Haplorhini; D006736:Horses; D006801:Humans; D008578:Meninges / Q000033:anatomy & histology*; D010841:Pia Mater / Q000033:anatomy & histology; D011817:Rabbits; D013116:Spinal Cord / Q000033:anatomy & histology / Q000166:cytology; D013126:Spinal Nerve Roots / Q000033:anatomy & histology / Q000166:cytology; D013346:Subarachnoid Space / Q000033:anatomy & histology