Methods : here is 20 adult corpse 's neck specimens , on them to anatomize , observe and measure the action of the greater occipital nerve , the place which is through trapezius muscle aponeurosis , deep fascia and the place entrapment happens easily .
Muscles that are typically weak and underactive are the abdominal muscles - especially the transversus abdominis , glutes ( butt ) , lower trapezius , serratus anterior and the deep stabilizing muscles of the neck and spine ( coli and multifidus respectively ) .