Matthew Halvorsen

This study identifies six genome-wide significant risk loci for tic disorders and links genetic risk to specific brain cell types and circuits.

This study conducts the first genome-wide association analysis of trichotillomania and finds no significant common variants but detects higher polygenic risk and copy number variants associated with neuropsychiatric disorders.

This study identifies 30 genome-wide significant loci for obsessive-compulsive disorder (OCD) using a large GWAS, linking risk to specific brain cell types and shared genetic risk with other psychiatric and non-psychiatric traits.

This study conducts a large-scale GWAS of OCD, identifying 15 new genome-wide significant loci and linking OCD to multiple cortical regions and cell types.

The paper introduces meaRtools, an R package for analyzing neuronal network data from microelectrode arrays, demonstrating its ability to identify epilepsy-like phenotypes in Celf4 knockout mice.

This study investigates the shared genetic basis of anorexia nervosa and obsessive-compulsive disorder using a cross-disorder GWAS, finding a significant genetic correlation and associations with psychiatric and metabolic traits.