845879.fig.002a
(a)
845879.fig.002b
(b)
845879.fig.002c
(c)
845879.fig.002d
(d)
Figure 2: Development of the mastoid process. Schematic representations of the development of the temporal bone from infancy to adulthood (from (a) to (b)). In the young infant, the mastoid is small, and the facial nerve, marked in red, is not yet covered by the mastoid process.