▁are ▁applied ▁at ▁varying ▁spe eds ▁and ▁amplit udes , ▁including ▁a ▁small ▁amplitude / ▁high ▁velocity ▁th era pe ut ic ▁movement .” ▁ ▁Classification ▁and ▁Mechan isms ▁▁ ▁J oint ▁mobil ization ▁is ▁class ified ▁by ▁the ▁Australian ▁phys i other ap ist ▁Geoff rey ▁Douglas ▁M ait land ▁into ▁five ▁' gr ades ' ▁of ▁motion , ▁each ▁of ▁which ▁describes ▁the ▁range ▁of ▁motion ▁of ▁the ▁target ▁joint ▁during ▁the ▁procedure . ▁They ▁are ▁generally ▁divided ▁into ▁five ▁gr ades . ▁The ▁different ▁gr ades ▁of ▁manip ulation ▁are ▁known ▁to ▁produce ▁select ive ▁activation ▁of ▁different ▁mechan ore cept ors ▁in ▁the ▁joint . ▁▁ ▁Gra de ▁I ▁- ▁Low ▁amplitude , ▁rh ythm ically ▁oscill ating ▁joint ▁gli de ▁near ▁the ▁rest ing ▁position ▁of ▁the ▁available ▁ar th ro kin ematic ▁joint ▁play . ▁Activ ates ▁Type ▁I ▁mechan ore cept ors ▁that ▁in hib it ▁n oc ice ption ▁and ▁provide ▁information ▁regarding ▁joint ▁position . ▁They ▁have ▁a ▁low ▁threshold ▁and ▁respond ▁to ▁a ▁few ▁gr ams ▁of ▁t ension . ▁ ▁Activ ates ▁mechan ore cept ors ▁in ▁the ▁super f icial ▁layer ▁of ▁the ▁joint ▁caps ule ▁- ▁Bul b ous ▁cor pus cles . ▁▁ ▁Gra de ▁II ▁- ▁Rel atively ▁large ▁amplitude , ▁rh ythm ically ▁oscill ating ▁joint ▁gli de ▁that ▁car ries ▁well ▁into ▁the ▁available ▁ar th ro kin ematic ▁joint ▁play . ▁Activ ates ▁Type ▁II ▁mechan ore cept ors ▁that ▁in hib it ▁n oc