Are nipple sensitivity and erection controlled by the same nerves ?

No they are not.  There is overlap and dual innervation.  Many stimuli can cause erection.  However, I would still take it as an encouraging sign that you will eventually gain some sensation if not completely.

The sensory nerves to the nipple are very sensitive especially to stretching caused by the implant which I believe is the most common cause for numbness rather than being cut. Fortunately as the tissues soften, the sensation often returns with in the first year. If your nipples can become erect then in my experience you will have more of a chance to regain sensation.Nipple erogenous sensation recovery and the rest of the skin of the breast where you describe numbness are from different nerves. Although it is highly likely that you may not have return of sensation, the good news is the vast majority of patients will have return of sensation within the first year after breast augmentation.#breastaugmentation#numbness

It is different nerves, but the fact that your nipple gets erect is a really positive sign that you will eventually regain sensation. It can just take a long time for the nerves to regenerate. Best, Dr. Nazarian

Thank you for your question.  The thoughts on the mechanism of nipple erection are not completely understood, but are largely governed by a person's autonomic nervous system, which is a different system then that for sensation.  Temporary changes in a nipple's sensation after surgery are not uncommon, and are usually the result of nerve irritation through stretch.  Occasionally this numbness may be permanent.  If it has been 10 months without improvement in sensation,your residual numbness will likely not improve completely. 

Yes, if your nipples still react, the numbness should resolve with time.  I know it has already been 10 months, but nerves sometimes take a long time to recover.  Hang in there.

It is not uncommon to loose nipple sensitivity but preserve nipple erection since these functions are controled by different nerves.  Sensation is not likely to return in your case.