{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"institution":[{"name":"bioRxiv"}],"indexed":{"date-parts":[[2026,5,27]],"date-time":"2026-05-27T00:06:58Z","timestamp":1779840418972,"version":"3.53.1"},"posted":{"date-parts":[[2026,5,23]]},"group-title":"Bioengineering","reference-count":71,"publisher":"openRxiv","license":[{"start":{"date-parts":[[2026,5,23]],"date-time":"2026-05-23T00:00:00Z","timestamp":1779494400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.biorxiv.org\/about\/FAQ#license"}],"funder":[{"DOI":"10.13039\/100023015","name":"Advanced Research Projects Agency for Health","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100023015","id-type":"DOI","asserted-by":"crossref"}]},{"name":"NYU Langone\u2019s Laura and Isaac Perlmutter Cancer Center","award":["NIH\/NCI P30CA016087"],"award-info":[{"award-number":["NIH\/NCI P30CA016087"]}]},{"name":"NYU Langone\u2019s Laura and Isaac Perlmutter Cancer Center","award":["P30CA016087"],"award-info":[{"award-number":["P30CA016087"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"accepted":{"date-parts":[[2026,5,23]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                <jats:p>Anxiety disorders are highly prevalent and often refractory to existing treatments, motivating the development of alternative neuromodulatory strategies. Peripheral bioelectronic approaches targeting the gut\u2013brain axis such as vagus nerve stimulation (VNS) demonstrate that modulation of visceral afferent pathways can influence central emotional circuits. Gastric electrical stimulation (GES) is a clinically established therapy for gastrointestinal motility disorders. While the stomach is densely innervated by vagal afferents, the effect of GES on anxiety-related behavior has not been systematically examined. We sought to identify neural pathways engaged by GES and effects of continuous chronic GES on behavior. To do this, we developed a gastric stimulation platform for rodents, a fully implantable, untethered system enabling chronic neuromodulation in freely moving rats. We combined this with cross-species whole-brain activity mapping in mice to interrogate circuit-level mechanisms. Using open field and elevated plus mazes, together with machine-learning-based behavioral tracking and multivariate modeling, we show that acute GES induces a robust, context-dependent anxiogenic phenotype characterized by reduced exploration and increased freezing, particularly in novel open-field environments. In contrast, chronic GES produces a divergent post-stimulation behavioral profile marked by enhanced exploratory behavior relative to acutely stimulated animals, indicating temporally dynamic reorganization of anxiety-related behavior. Principal component analysis and hierarchical clustering further revealed that stimulation reshapes the multivariate structure of behavioral features rather than shifting animals along a single anxiety continuum. Whole-brain c-Fos mapping revealed anatomically distributed modulation of limbic\u2013cortical networks following gastric stimulation, including suppression of ventral medial entorhinal cortex, excitation of nucleus tractus solitarii and heterogeneous recruitment of amygdalar and hippocampal subregions. These circuit-level patterns align with the behavioral dissociation between contextual exploration and explicit threat avoidance, providing convergent cross-species evidence that gastric stimulation engages distributed anxiety-related networks. Together, these findings establish the first freely moving behavioral model of chronic gastric neuromodulation, demonstrate temporally dynamic and context-sensitive effects on anxiety-like behavior, and provide systems-level validation that the stomach can serve as a viable peripheral access point for modulating central emotional circuits.<\/jats:p>","DOI":"10.64898\/2026.05.20.726694","type":"posted-content","created":{"date-parts":[[2026,5,23]],"date-time":"2026-05-23T18:50:13Z","timestamp":1779562213000},"source":"Crossref","is-referenced-by-count":0,"title":["Divergent Behavioral and Circuit-Level Adaptations to Acute and Chronic Gastric Electrical Stimulation"],"prefix":"10.64898","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4658-7444","authenticated-orcid":false,"given":"Maryana","family":"Daood","sequence":"first","affiliation":[{"name":"Tandon School of Engineering, New York University, New York, NY 11201, 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