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.-12
G.B.-11
1/3
Approximate
level of the root
of the ear
Mastoid process
Fig. 3.30
G.B.-20
Lower border
of the occiput
BL-10
Du-15
Occipital
bone
Axis Sternocleido-
mastoid
G.B.-20
Fig. 3.31
Sagittal suture
Lambdoid suture
Occipitomastoid
suture
Parietal bone
Occipital bone
Mastoid
process
External occipital
protuberance
Du-16
BL-9 Du-17 BL-9
Du-17 BL-9
Du-16
G.B.-20
Transverseprocess of C1 BL-10
the atlas
External
occipital
protuberance
Fig. 3.33
Fig. 3.32