CRANIO / C0–C1
C0–C1: the upper cranio-cervical reference.
C0 is the occipital base of the skull; C1 is the atlas.
C0–C1
C0–C1: the upper cranio-cervical reference.
C0 is the occipital base of the skull; C1 is the atlas.
Observation
Separate observation from interpretation.
Context
Context makes a state comparable over time.
Verification
Before, after, context and time remain visible.