Henry Gray (1825–1861). Anatomy of the Human Body. 1918.
FIG. 1212– Diagram showing the relation of the medulla spinalis to the dorsal surface of the trunk. The bones are outlined in red. (See enlarged image)
4. Surface Markings of the Back
Bony Landmarks.—In order to identify any particular spinous process it is customary to count from the prominence caused by the seventh cervical and first
