3 Anatomical Orientation
3.1.5 Occiput
Craniocervical transition (Figs 3.28–3.32)
The transition from the head to the neck is formed by the mas-
toid process, the adjacent dorsal musculature and the occiput.
The following points are located in this area (from lateral to
medial) G.B.-12, yiming(Ex-HN-14), anmian(Ex-HN),
G.B.-20, BL-10, Du-15and Du-16.External occipital protuberance
(Figs 3.32, 3.33)
The external occipital protuberance forms a flat projection on
the posterior midline of the occiput, which can be palpated
slightly superior to the craniocervical transition. It defines the
location of Du-16, Du-17and BL-9.Sometimes, and more
frequently in women, the protuberance may be defined only
poorly or not at all.Posterior hairline (no figure)
The posterior hairline is used as a reference point for locating
points on the occiput, but due to its variable position it is not a
very reliable landmark.G.B.-12G.B.-11
1/3Approximate
level of the root
of the earMastoid process
Fig. 3.30G.B.-20Lower border
of the occiput
BL-10
Du-15Occipital
boneAxis Sternocleido-
mastoidG.B.-20Fig. 3.31Sagittal suture
Lambdoid sutureOccipitomastoid
sutureParietal boneOccipital boneMastoid
processExternal occipital
protuberanceDu-16BL-9 Du-17 BL-9Du-17 BL-9Du-16G.B.-20
Transverseprocess of C1 BL-10
the atlasExternal
occipital
protuberanceFig. 3.33Fig. 3.32