▁induced ▁in ▁a ▁matter ▁of ▁seconds ▁to ▁minutes , ▁home ost atic ▁pl astic ity ▁has ▁to ▁react ▁rapidly . ▁This ▁requirement , ▁however , ▁is ▁not ▁met ▁by ▁most ▁forms ▁of ▁home ost atic ▁pl astic ity , ▁which ▁typically ▁act ▁on ▁times cal es ▁of ▁hours , ▁days ▁or ▁longer . ▁ ▁This ▁limitation ▁does ▁not ▁seem ▁to ▁apply ▁to ▁heter os yn apt ic ▁pl astic ity . ▁ ▁To ▁achieve ▁a ▁home ost atic ▁effect , ▁heter os yn apt ic ▁pl astic ity ▁serving ▁a ▁home ost atic ▁role ▁have ▁to ▁cause ▁path way ▁un specific ▁syn apt ic ▁changes ▁in ▁the ▁opposite ▁direction ▁as ▁Heb bian ▁pl astic ity . ▁In ▁other ▁words , ▁whenever ▁hom os yn apt ic ▁long - term ▁pot enti ation ▁is ▁induced ▁at ▁a ▁given ▁syn ap se , ▁other ▁un st im ulated ▁syn aps es ▁should ▁be ▁de pressed . ▁Con vers ely , ▁hom os yn apt ic ▁long - term ▁de pression ▁would ▁cause ▁other ▁syn aps es ▁to ▁pot enti ate ▁in ▁a ▁manner ▁which ▁keeps ▁the ▁average ▁syn apt ic ▁weight ▁approximately ▁conser ved . ▁The ▁scope ▁of ▁these ▁changes ▁could ▁be ▁global ▁or ▁compart ment al ized ▁in ▁the ▁d end rit es . ▁ ▁Mod ul atory ▁input - dependent ▁pl astic ity ▁▁ ▁One ▁well ▁studied ▁example ▁of ▁heter os yn apt ic ▁pl astic ity ▁is ▁mod ul atory ▁input - dependent ▁pl astic ity . ▁ ▁Mod ul atory ▁neur