Some of the downsides of the aging brain... that can be improved...

As the brain ages we have a decrease in dopamine receptors (the feel good neurotransmitter).  This can lead to depression.  Glucose can also decrease and create memory loss.  This can lead to not being able to learn new things at the rate of the younger brain.  The brain processing speed slows, leading to a gradual decline in the ability to recall events, make plans and coordinate tasks.
However, we need to look back to what we learned yesterday.  The brain has the ability to start working with both of the hemispheres, right and left.  So what is called judgement or wisdom increases, scientists call this crystallized intelligence.  And because the brain structures start interacting differently the result can be greater optimism because you develop a more philosophical view of life.
Come and try LENS neurofeedback.  It will improve the function of the brain.  Getting older doesn't have to include cognitive decline.