Holly Barker is a freelance writer specializing in biology, medicine and psychology. She has a Ph.D. in clinical neuroscience from King’s College London in the United Kingdom and a B.Sc. degree in biochemistry from the University of Manchester. She has previously written for Discover and BioNews. She is based in London.
Holly Barker
Contributing writer
From this contributor
Constellation of studies charts brain development, offers ‘dramatic revision’
The atlases could pinpoint pathways that determine the fate of cells linked to neurodevelopmental conditions.
Constellation of studies charts brain development, offers ‘dramatic revision’
By
Holly Barker
5 November 2025 | 6 min read
Protein tug-of-war controls pace of synaptic development, sets human brains apart
Human-specific duplicates of SRGAP2 prolong cortical development by manipulating SYNGAP, an autism-linked protein that slows synaptic growth.
Protein tug-of-war controls pace of synaptic development, sets human brains apart
By
Holly Barker
23 October 2025 | 9 min listen
Worms help untangle brain structure/function mystery
The synaptic connectome of most animals bears little resemblance to functional brain maps, but it can still predict neuronal activity, according to two preprints that tackle the puzzle in C. elegans.
Worms help untangle brain structure/function mystery
By
Holly Barker
29 August 2025 | 9 min listen
Oxytocin prompts prairie voles to oust outsiders, fortifying their friendships
The “love hormone” drives the neurobiology behind platonic bonds in animals usually studied for their romantic attachments.
Oxytocin prompts prairie voles to oust outsiders, fortifying their friendships
By
Holly Barker
8 August 2025 | 8 min listen
Genetic background steers PTEN syndrome traits
People with the syndrome, caused by variants in the gene PTEN, often have autism or cancer, or both, but it depends on the genetic diversity encoded in the components of distinct cell signaling pathways, according to a new study.
Explore more from The Transmitter
‘Neuroethics: The Implications of Mapping and Changing the Brain,’ an excerpt
In his new book, published today, philosopher Walter Glannon examines the ethics of six areas of neuroscience. In Chapter 4, a portion of which appears below, he tackles the ethical considerations of using brain organoids in research.
‘Neuroethics: The Implications of Mapping and Changing the Brain,’ an excerpt
In his new book, published today, philosopher Walter Glannon examines the ethics of six areas of neuroscience. In Chapter 4, a portion of which appears below, he tackles the ethical considerations of using brain organoids in research.
By
Walter Glannon
11 November 2025 | 7 min read
Teasing out mosaicism cell by cell; and more
Here is a roundup of autism-related news and research spotted around the web for the week of 10 November.
Teasing out mosaicism cell by cell; and more
Here is a roundup of autism-related news and research spotted around the web for the week of 10 November.
By
Jill Adams
11 November 2025 | 2 min read
Without monkeys, neuroscience has no future
Research in primate brains has been essential for the development of brain-computer interfaces and artificial neural networks. New funding and policy changes put the future of such advances at risk.
Without monkeys, neuroscience has no future
Research in primate brains has been essential for the development of brain-computer interfaces and artificial neural networks. New funding and policy changes put the future of such advances at risk.
By
Cory Miller, J. Anthony Movshon, Doris Tsao
10 November 2025 | 5 min read