= Coordinate systems =
== Subject Coordinate System (SCS) ==
Definition

How to position the points

=== Nasion (NAS) ===
=== Left pre-auricular point (LPA) ===
=== Right pre-auricular point (RPA) ===
== Talaraich coordinate system ==
Definition

How to position the points

=== Anterior comissure (AC) ===
Description of the anterior commissure at [[http://en.wikipedia.org/wiki/Anterior_commissure|this Wikipedia page]].

Technique to localize it: use

=== Posterior commissure (PC) ===
Description of the posterioe commissure at [[http://en.wikipedia.org/wiki/Posterior_commissure|this Wikipedia page]].

=== Interhemispheric point (IH) ===