The human brain is like a journal with a tight deadline: it processes new information while working on long-term tasks. A new study from Rutgers Health shows how this balance of speed can affect one's thought, conduct, and susceptibility to mental illness.ight affect how people think, act, and are aware of mental illness.

The study, published in Nature Communications, demonstrates how the brain blends quick reactions with slower, reflective processing via its white matter network, which connects different brain regions. The findings assist in understanding why people think and respond differently, as well as why disturbances may be associated with psychiatric diseases. 

The study, conducted by scientists at Rutgers Health in the United States, examined brain imaging data from 960 people. Researchers created precise maps of each person's brain connections, known as connectomes, and utilised mathematical models to better understand how information moves across these networks. 

Different parts of the brain handle information in different times, a trait known as intrinsic neural timelines. Some regions reply in milliseconds, while others take longer to process meaning. 

"To affect our environment through action, our brains must combine information processed over different timescales," stated Linden Parkes, senior author and assistant professor of psychiatry at Rutgers Health. "The brain achieves this by leveraging its white matter connectivity to share information across regions, and this integration is crucial for human behaviour." 

"Our work probes the mechanisms underlying this process in humans by directly modelling regions' INTs based on their connectivity," Parkes told the audience. "This draws a direct link between how brain regions process information locally and how that processing is shared across the brain to produce behaviour." 

The scientists discovered that how fast and slow processes are spread across the brain influences how quickly people transition between large-scale activity patterns associated with behaviour. This structure varied between individuals and contributed to explaining disparities in cognitive ability. 

The researchers also demonstrated that similar temporal patterns are related to genetic and molecular properties of brain tissue and were observed in mouse brains, implying a common biological mechanism. 

"Our work highlights a fundamental link between the brain's white-matter connectivity and its local computational properties," says Parkes. "People whose brain wiring is better matched to the way different regions handle fast and slow information tend to show higher cognitive capacity." 

The findings are now being applied to mental diseases such as schizophrenia, bipolar disorder, and depression, where thinking and emotion are impaired. 

The study was conducted in partnership with Rutgers' Avram Holmes, Cornell's Jason Z. Kim, and postdoctoral researchers Ahmad Beyh and Amber Howell. The findings lead to additional mental health studies.