a. Flexion 
and 
Extension. 
Longus colli 
Rectus capitis anticus major 
_ Scaleni antici (together) 
Psoas magnus and parvus 
Levator ani 
| Ischio-coccygeus 
Sphincter ani externus 
Rectus abdominis 
Pyramidalis abdominis 
Obliquus externus abdominis 
Obliquus internus 
Transversalis 
9 
” 
Serrati postici 
Splenius capitis 
Splenius colli 
Erector spine 
Semispinalis dorsi 
Semispinalis colli 
Complexus 
. Multifidus spinze 
Interspinales 
Intercostal muscles 
Diaphragm 
Triangularis sterni 
b. 
Lateral Movement (Rotation). 
Levator anguli scapule 
Serrati postici 
Splenius colli 
Erector spine 
Complexus 
Semispinalis 
Multitidus spine 
Rotatores dorsi 
_ Inter-transversales 
_ Longus colli 
Rectus capitis anticus major 
Scaleni, anticus, medius, posticus. 
Psoas magnus and parvus 
Quadratus lumborum 
Obliquus externus abdominis 
Obliquus internus 
Transversalis 
Rectus 
Pyramidalis 
” 
” 
” 
” 
2. Movements of the Head.—The movements of the head are flexion and extension, at the 
occipito-atlantoid articulation ; lateral movement and rotation at the atlanto-axial joint. 
a. Flexion 
and 
Extension. 
Digastric 
Stylo-hyoid 
Stylo-pharyngeus 
Mylohyoid 
Hyoglossus 
Sterno-hyoid 
Sterno-thyroid 
Omo-hyoid 
Recti capitis antici (major and minor) 
(the muscles of both sides acting together) 
Sterno-mastoid 
Splenius capitis 
Trachelo-mastoid 
Complexus 
Obliquus inferior 
Recti capitis postici (major and minor) 
b. Lateral Movement. 
c. Rotation. 
Sterno-mastoid 
Splenius capitis 
Trachelo-mastoid 
Complexus 
Obliquus superior 
_ Rectus capitis lateralis 
Sterno-mastoid 
Splenius capitis 
Trachelo-mastoid 
Complexus 
Obliquus inferior 
55 superior 
Recti capitis postici (major and minor) 
3. Movements of the Pelvis.—The movements of the pelvis (as in locomotion) are partly 
caused by certain of the muscles of the back. Those muscles, which are attached to the spinal — 
) column or the ribs on the one hand, and to the innominate bone on the other, produce the 
movements (flexion, extension, and lateral movement) of the whole pelvis. Im addition, the 
) muscles passing between the innominate bone and femur, in certain positions of the lower limb, 
assist In these movements. 
