How to identify the central sulcus

> The superior frontal sulcus stop at the precentral gyrus.
> The central sulcus is in front of the pars marginalis.
> The hand hook is on the precentral gyrus.
> The precentral gyrus is thicker than the post central gyrus.



red line : central sulcus
yellow line : superior frontal sulcs
blue line : pars marginalis (帯状回縁部)
green circle : precetral knob (hand hook)