ial ▁lem nis cus ▁path way ▁( DC ML ), ▁that ▁car ries ▁mechan os ens ory ▁information ▁from ▁part ▁of ▁the ▁head ▁and ▁the ▁rest ▁of ▁the ▁body , ▁the ▁trig em inal ▁lem nis cus ▁car ries ▁mechan os ens ory ▁information ▁from ▁the ▁face . ▁However , ▁the ▁trig em inal ▁lem nis cus ▁also ▁car ries ▁pain ▁and ▁temperature ▁sens ations ▁from ▁the ▁contr al ater al ▁or of a cial ▁region , ▁just ▁as ▁the ▁spin oth al am ic ▁tract ▁car ries ▁these ▁sens ations ▁from ▁the ▁contr al ater al ▁body . ▁Thus , ▁the ▁trig em inal ▁lem nis cus ▁of ▁the ▁head ▁is ▁function ally ▁analog ous ▁to ▁both ▁the ▁DC ML ▁tract s ▁and ▁the ▁spin oth al am ic ▁tract ▁of ▁the ▁body . ▁ ▁Div isions ▁ ▁The ▁trig em inal ▁lem nis cus ▁contains ▁two ▁main ▁divisions : ▁ ▁The ▁vent ral ▁trig em inal ▁tract , ▁consisting ▁of ▁second ▁order ▁neur onal ▁ax ons ▁from ▁the ▁principal ▁( ch ief ▁sens ory ) ▁nucle us ▁and ▁sp inal ▁trig em inal ▁nucle us . ▁These ▁fib ers ▁cross ▁the ▁mid line ▁and ▁asc end ▁to ▁the ▁contr al ater al ▁th al am us . ▁ ▁The ▁d ors al ▁trig em inal ▁tract , ▁consisting ▁of ▁second ▁order ▁neur onal ▁ax ons ▁from ▁the ▁principal ▁( ch ief ▁sens ory ) ▁nucle us . ▁These ▁fib ers ▁do ▁not ▁cross ▁the ▁mid line , ▁and ▁asc end ▁to