No, a black hole cannot appear in a brain. Black holes are formed when massive stars collapse at the end of their lives. The resulting black hole is so dense that its gravity is so strong that not even light can escape. The smallest black holes that are theoretically possible are still millions of times more massive than the Earth.

The brain is made up of mostly water and soft tissue. It is not possible for enough mass to collapse in a brain to form a black hole. Even if it were possible, the black hole would be so small that it would have no effect on the brain.

There is a condition called **hippocampal black holes** that is sometimes described as “black holes in the brain.” However, this is a misnomer. Hippocampal black holes are actually areas of damage in the hippocampus, a part of the brain that is involved in memory. The damage is caused by a build-up of amyloid plaques, which are proteins that are associated with Alzheimer’s disease.

So, while it is not possible for a black hole to appear in a brain, there is a condition that is sometimes called “black holes in the brain” that is caused by damage to the hippocampus.