Hey Alyssa –
To me, I think it depends on the situation and who you’re explaining it to. If it’s a medical person, more detail. If it’s someone curious, then less. In your situation, I would handle those interviews like I used to handle job interviews at work before I retired. Most of my evaluation of their technical skills were from their resume and references (and yes, they can embellish), so I’d ask one or two technical questions to assess their understanding. Most of the questions were soft skills as we’d be working together and I needed to understand how they would interact with me and also with their peers (folks already on my team). That chemistry is important.
So, in your case, the specific nature of details on SMA might not be relevant to assess their ability to provide you with the care and support needed. For me, I’d say something along the lines of, “I have Spinal Muscular Atrophy, Type 3. It is a progressively degenerative condition as I lack a certain protein and this causes signals to not reach my muscles, so the motor neurons die which causes the muscles to atrophy/weaken.” And then describe the nature of the help you will need. At that very specific point, I would stop and give them an opportunity to ask any questions. If they’re reluctant to ask questions, I would ask them if they’ve ever worked with an SMA patient before, if so, what was that experience like, and if not, again prompt them for questions.
To be clear, I have NEVER hired anyone who didn’t ask good questions. You can tell a lot about someone by the questions they ask.