I'm a retired pro boxer starting to feel the effects of repeated cranial trauma.(memory loss, depression and speech).how do i alleviate this?

Brain trauma: Acquired or traumatic brain trauma can result in consequences like parkinson's and alzheimer's. Think mohammed alli. Consult good neurologist as there are medications that may help. This entity has been ignored for years until recently. It is very real and with modern diagnosis and treatment you can be helped.

Not sure: That's a hard one. What's damaged stays damaged but keeping mentally active with reading, puzzles etc would be a good idea.

Treat depression+...: Important to get good baseline assessment, especially neuropsych testing. While you may not be able to reverse the physical damage, you can treat depression with therapy and antidepressants. Depression makes concentration and memory worse; they may improve when it is treated. Check with your md about muscle pain; some antidepressants help with this. Be careful with alcohol, can add to problem.

Check with your Dr.: The effects of repeated concussions vary depending on the number and severity. There is the entity of dementia pugilistica reported in boxers. You should check with your physician who may request additional tests such as an MRI scan of the brain to determine if there are any structural effects from the repeated head trauma. Ie. Post-traumatic hydrocephalus, diffuse axonal injury can be detected.