Cervical sympathetic block.
D000766:Anesthesia, Dental / Q000009:adverse effects*; D000772:Anesthesia, Local / Q000009:adverse effects*; D000779:Anesthetics, Local / Q000009:adverse effects; D006801:Humans; D009333:Neck / Q000294:innervation; D013564:Sympathetic Nervous System / Q000187:drug effects
D000779:Anesthetics, Local