Explaining a gap after caregiving or layoff (Boston)

My résumé shows a gap from a layoff and some health issues. I am in Boston, in case local advice matters. I have done some volunteering and a course during that time. How did you handle it on your résumé?

Thanks for writing this out. I went through something close to it 8 months ago, and it settled down once I kept a simple log of every call and form.