Forebrain development: From neural plate to cortical specification

The forebrain begins as a simple sheet of cells in the embryo and must fold, divide, and specialise into the cerebral hemispheres that govern thought, movement, and emotion. This matters because when these early developmental steps go wrong, the result can be mild to severe intellectual disability. Scientists do not yet understand the sequence of molecular and cellular events that transforms that flat neural plate into the intricately layered human forebrain. This programme aims to map those events in vertebrates, with a particular focus on the steps that create the extra complexity seen in the mammalian brain. This is fundamental science. It will not produce a drug or a diagnostic test in the short term. But understanding how the forebrain builds itself could, in the longer term, reveal new targets for treating intellectual disabilities. It may also give stem cell researchers the instructions they need to grow organised brain tissue in the lab for regenerative therapies. Similar fundamental work on neural development has already underpinned advances in organoid models and our understanding of conditions such as autism and epilepsy.