es ▁minor ▁is ▁to ▁mod ulate ▁the ▁action ▁of ▁the ▁del to id , ▁prevent ing ▁the ▁hum eral ▁head ▁from ▁sl iding ▁up ward ▁as ▁the ▁arm ▁is ▁ab duct ed . ▁It ▁also ▁functions ▁to ▁rotate ▁the ▁hum er us ▁later ally . ▁The ▁ter es ▁minor ▁is ▁inner v ated ▁by ▁the ▁ax ill ary ▁n erve . ▁ ▁Str ucture ▁It ▁ar ises ▁from ▁the ▁d ors al ▁surface ▁of ▁the ▁ax ill ary ▁border ▁of ▁the ▁sc ap ula ▁for ▁the ▁upper ▁two - third s ▁of ▁its ▁extent , ▁and ▁from ▁two ▁ap one uro t ic ▁l am inae , ▁one ▁of ▁which ▁separ ates ▁it ▁from ▁the ▁in fr asp in atus ▁mus cle , ▁the ▁other ▁from ▁the ▁ter es ▁major ▁mus cle . ▁ ▁Its ▁fib ers ▁run ▁ob liqu ely ▁up wards ▁and ▁later ally ; ▁the ▁upper ▁ones ▁end ▁in ▁a ▁tend on ▁which ▁is ▁inserted ▁into ▁the ▁lowest ▁of ▁the ▁three ▁impress ions ▁on ▁the ▁greater ▁t uber cle ▁of ▁the ▁hum er us ; ▁the ▁lowest ▁fib ers ▁are ▁inserted ▁directly ▁into ▁the ▁hum er us ▁immediately ▁below ▁this ▁impression . ▁ ▁Rel ations ▁The ▁ter es ▁minor ▁origin ates ▁at ▁the ▁later al ▁border ▁and ▁adjacent ▁posterior ▁surface ▁of ▁the ▁sc ap ula . ▁It ▁inser ts ▁at ▁the ▁greater ▁t uber cle ▁of ▁the ▁hum er us . ▁The ▁tend on ▁of ▁this ▁mus cle ▁passes ▁across , ▁and ▁is ▁un ited ▁with , ▁the ▁posterior ▁part