Answer:
As the transmission medium between muscles and bone, tendons perform an essential role in movement by transmitting the contraction force generated by muscles to the bones they hold, making them essential for joint stability.
The brain stem which is composed of the Pons, The Medulla, and the Midbrain serve a very vital function... They control the functions that keep you alive; Heart Rate, Respiratory Rate, Breathing input and output, Blood pressure, as well a vasomotor functions. So taking this into account, an injury to the brain stem is extremely bad, as that can and will most definitely be very lethal.
