M. trapezius
origo
- pars descendens: linea nuchae superior, protuberantia occipitalis externa,
ligamentum nuchae, proc. spinosus C7
- pars transversa: T1-T5
- pars ascendens: T6-T12
insertie
- pars descendens: laterale ⅓ clavicula
- pars transversa: bovenrand acromion en laterale ⅓ spina scapulae
- pars ascendens: bovenrand mediale ⅔ spina scapulae
functie
- adductie scapula
- in mindere mate exorotatie scapula → cavitas glenoidalis naar craniaal
- pars descendens: elevatie scapula
- pars ascendens: depressie
geïnverseerde functie
- unilateraal: extensie, laterale flexie en wegdraaien van hoofd
- bilateraal: extensie hoofd en nek
M. latissimus dorsi
origo
- proc. spinosus T7-T12
- 3 of 4 onderste ribben
- fascia thoracolumbalis
- binnenste ⅓ crista iliaca
- angulus inferior scapulae
M. pectoralis major
origo
- pars clavicularis: mediale ⅔ van de voorrand van de clavicula
- pars sternocostalis: sternum + kraakbeen van 6/7 craniale ribben
- pars abdominalis: rectusschede
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