Bottom part of the brainstem. Transitions upwards into the bridge and borders downwards to the
spinal cord. At the front, the elongated marrow, on either side of the midline, exhibits two distinct elevations: an inner - the pyramid
- and an outer - the olive
. At the posterior, the medulla on either side of the midline exhibits two distinct elevations: the inner
and outer posterior tubercles
. Cranial nerves 6
(partially), and 12
all originate from the medulla.