Researchers develop blood test that can reliably detect Alzheimer’s disease

When doctors need to confirm an Alzheimer's diagnosis, they often turn to a combination of brain imaging and cell analysis. Both have their downsides. The latter involves a lumbar puncture, an invasive and painful procedure that’s more commonly known as a spinal tap. A doctor will insert a needle into the lower back to extract a sample of the patient’s cerebrospinal fluid. A lab technician then tests the sample for signs of progressive nerve cell loss and excessive amyloid and tau protein accumulation. MRI scans are less invasive but they’re often expensive and accessibility is an issue; not every community has access to the technology.