I read your question and I understand your confusion in front of all those terms.
It would have been useful if you had stated your age and the symptoms which you are experiencing which led to the MRI.
The neck MRI reports of some degenerative changes of the spine which are very common with age due to the strain the spine endures over the years. Often they might cause no symptoms, but at times might cause some
neck pain and if there is compression of a nerve root pain spreading in the arm innervated by that root. That's why I said you should have given your symptoms to see if they correlated with the findings. There is a foraminal narrowing on the left the level of the 6th and 7th vertebrae, the foramina is the tunnel where the nerve root passes, so if you have pain,
tingling spreading to your left arm that means there might be
nerve root compression by the degenerative changes. Therapy is through
physical therapy and pain killers when needed, if not enough local injections of
steroids and anesthetics may be tried, surgery shouldn't be necessary.
The brain MRI has only some mild vascular changes related to age as well, shouldn't cause any symptoms, don't seem to have augmented compared to a past MRI you've had and do not necessitate of any particular treatment apart from controlling blood vessel disease risk factors like
high blood pressure, blood
cholesterol, obesity, smoking interruption.
I hope to have been of help.