The C1 nerve does not have dermatomal distribution.
Abouleish
E I
EI
D000779:Anesthetics, Local; D002045:Bupivacaine; D003391:Cranial Nerves / Q000033:anatomy & histology* / Q000187:drug effects; D005145:Face / Q000294:innervation; D006801:Humans; D009407:Nerve Block; D012535:Scalp / Q000294:innervation*
D000779:Anesthetics, Local; D002045:Bupivacaine