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