106–EXTRINSICMUSCLES
Trapeziusparsspinalis
Leftcraniodorsolateral
Leftcaudodorsolateral
Leftdorsolateral
Leftlateral
Rightdorsomedial
RightdorsalRightdorsal
Rightdorsomedial
Dorsal
©1996JonZahourek
EXTRINSICMUSCLES –107
Trapeziusparsspinalis
ActionsDepressesandretractsthescapula,rotatestheglenoidfossaupward.
AttachmentsAxialSpinousprocessesofvertebraeT4toT12throughthesupraspinousligament.PectoralTubercleattheapexofatriangularsurfaceatthemedialendofthescapularspine.
tra•peez•ee•usFromtheGreek,“trapeza”,meaningatableorafigure
withfourunequalsides.
parzLatin,meaningpart.
spy•nal•usLatin,“spina”+“alis,”
meaningrelatedtothespine.
Craniodorsal
Dorsal
©1996JonZahourek
108–EXTRINSICMUSCLES
Trapeziusparsacromialis
Leftlateral
Leftdorsolateral
Craniodorsal
Rightdorsomedial
Rightdorsal
Leftdorsolateral
©1996JonZahourek
EXTRINSICMUSCLES –109
ActionsRetractsthescapulaandrotatestheglenoidfossaupward.
AttachmentsAxialCaudalpartofthenuchalligament,spinousprocessesofvertebraeC6toT3throughanaponeurosis.PectoralMedialmarginoftheacromionprocessandthecraniallipofthescapularspine.
tra•peez•ee•usFromtheGreek,“trapeza”,
meaningatableorafigurewithfourunequalsides.
parzLatin,meaningpart.
a•crow•mee•al•usFromtheGreek,“akromion”andtheLatin,”alis”,meaningrelated
tothepointoftheshoulder.
Trapeziusparsacromialis
Dorsal
Caudodorsal
©1996JonZahourek
110–EXTRINSICMUSCLES
Trapeziusparsclavicularis
Cranioventral
Leftlateral
Leftventrolateral
Caudodorsal
Caudodorsal
Leftcraniodorsal
Rightdorsal
©1996JonZahourek
EXTRINSICMUSCLES –111
ActionsElevatesandretractsthescapula,rotatesitupward.
AttachmentsAxialSuperiornuchalline,cranialpartofthenuchalligament.PectoralCranialsurfaceofthelateral1/3oftheclavicle.
tra•peez•ee•usFromtheGreek,“trapeza”,
meaningatableorafigurewithfourunequalsides.
parzLatin,meaningpart.
klah•vik•you•lar•usLatin,meaningrelated
totheclavicle.
Trapeziusparsclavicularis
Dorsal
Ventral
©1996JonZahourek