Complex sentence: Kennedy did regain certain functions with the help of therapies; most notably, he went to The Institutes for the Achievement of Human Potential in 1964, a Philadelphia center that teaches therapies for people with brain injuries.
Split into simpler sentences: Kennedy did regain certain functions with the help of therapies. Most notably, he went to The Institutes for the Achievement of Human Potential in 1964, a Philadelphia center that teaches therapies for people with brain injuries.