A relatively new class of autoimmune diseases that affect the brain is making psychiatrists rethink some diagnoses.

The images showed that nearly all the antibodies bind to a single domain of the receptor, providing a viable target for novel therapeutics.

“My year of unraveling” is how a despairing Christy Morrill described nightmarish months when his immune system hijacked his brain. What’s called autoimmune encephalitis attacks the organ that makes ...