▁ar tery ▁compression ▁and ▁reduced ▁blood ▁flow ▁in ▁stress ful ▁arm ▁positions ▁and ▁or ▁man eu vers ▁can ▁be ▁diagn osed ▁by ▁a ▁Do pp ler ▁ul tr ason ography . ▁The ▁n erve ▁should ▁be ▁detected ▁adjacent ▁to ▁the ▁vessel . ▁In ▁an ▁elev ated ▁arm ▁position ▁the ▁ax ill ary ▁ne uro vas cular ▁bundle ▁can ▁be ▁seen ▁at ▁the ▁posterior ▁ax ill ary ▁fol d ▁just ▁before ▁it ▁per for ates ▁the ▁del to ide us , ▁while ▁the ▁posterior ▁course ▁is ▁well ▁visible ▁in ▁the ▁neutral ▁position . ▁For ▁a ▁detailed ▁assess ment ▁of ▁the ▁ar tery , ▁a ▁MR ▁ang i ography ▁is ▁required . ▁The ▁major ▁task ▁of ▁an ▁ul tr ason ographic ▁exam ination ▁is ▁to ▁rule ▁out ▁any ▁space ▁occup ying ▁mass . ▁Add itional ▁elect rom y ography ▁is ▁helpful ▁to ▁reve al ▁any ▁dec eler ated ▁n erve ▁condu ction ▁velocity , ▁and ▁thus ▁d ener v ation ▁of ▁the ▁concerned ▁mus cle . ▁ ▁Add itional ▁images ▁ ▁See ▁also ▁Access ory ▁mus cles ▁of ▁the ▁sc ap ula ▁ ▁References ▁ ▁External ▁links ▁▁▁▁ ▁Ex R x ▁ ▁Category : Mus cles ▁of ▁the ▁upper ▁lim b ▁Category : Rot ator ▁cu ff ▁Category : Should er ▁extens ors ▁Category : Should er ▁later al ▁rot ators <0x0A> </s> ▁" The ▁Dead ▁Past " ▁is ▁a ▁science ▁fiction ▁short ▁story ▁by ▁American ▁writer ▁Isaac ▁As im ov , ▁first ▁published ▁in ▁the ▁April ▁ 1 9 5 6 ▁issue ▁of ▁Ast