3.4 Spine and Sacroiliac RegionVertebra prominens (spinous process of C7)
(Figs 3.67, 3.68)
Two fingers (for example the index and middle finger) are
placed on the spinous processes assumed to belong to C6 and
C7. The patient is then asked to flex and extend his/her head.
With a fully functional spine, the spinous process of C6 will start
to slide anteriorly with the slightest extension, while the process of
C7 will remain ‘fixed’. With further extension, the process of C6
will disappear completely, while the one of C7 remains palpable.
If the practitioner can feel movement under his/her upper finger
as described above, the fingers are placed on the spinous process
of C6 and C7. If, however, the process under the upper finger
remains palpable even with stronger extension, the fingers are
most likely resting on T1 and C7.
Correct identification of C6 is important, since C7 is not always
the ‘vertebra prominens’. In many cases, the spinous process of
T1 is equally or even more prominent than that of C7.
Du-14is located below the spinous process of C7.Axis, dens
AtlasAxis
Spinous
process
of the atlasVertebra
prominens (C7)Du-14Extension and
flexion of the
headS.I.-15G.B.-212 fingers on the
spinous processes
of C6 and C7Fig. 3.67
Fig. 3.68