Masses of myelinated nerve fibers appear

What do you call this connection between the structures?

Almost all sensory signals pass through the__________ on the way to the cerebrum.

Responsible for motor skills, like riding a bicycle and maintaining balance:

The whole nervous system is divided into two main division,called the:

 Letter D is pointing to which canal?

Letter C is pointing to which structure? Hint: the white design.

What do you call this big crack?  Letter B.

 Together these 3 bones are known as the _______________.

What do you call the “ridges” marked by Letter A.