The fetal brain grows enormously during pregnancy, both in terms of its size and the number of neurons it has.
Dr. Walsh is an HHMI investigator whose research focuses on understanding the genes involved in the development and function of the human brain.
Most of the neurons of the cerebral cortex arise from progenitor cells that undergo repeated cell division.
Dante is a healthy 10-year-old boy who has had half his cerebral cortex surgically removed to treat his seizures.
Dr. Christopher Walsh discusses how genomic science has made enormous contributions to our understanding of the genetic causes of autism.
Dante is a 10-year-old boy born with hemimegalencephaly—an enlargement of half his brain.
The poster for the 2013 Holiday Lectures on Science, Medicine in the Genomic Era, illustrates the difference between germline and somatic cell mutations.