Julian Simmons

Bugs and Brains, the Gut and Mental Health Study: a mixed-methods study investigating microbiota composition and function in anxiety, depression and irritable bowel syndrome.

Carra A Simpson, Orli S Schwartz, Djamila Eliby, Catherine A Butler, Katherine Huang, Neil O'Brien-Simpson, Bridget L Callaghan, Stuart G Dashper, Paul R Gooley, Sarah Whittle, Nick Haslam, Julian G Simmons

Journal article  |  2021  |  BMJ Open

INTRODUCTION: Research has highlighted relationships between the micro-organisms that inhabit our gastrointestinal tract (oral and..

The impact of posttraumatic stress disorder on event-related potentials in affective and non-affective paradigms: A systematic review with meta-analysis

Lisa N Miller, Julian G Simmons, Sarah Whittle, David Forbes, Kim Felmingham

Journal article  |  2021  |  Neuroscience & Biobehavioral Reviews

Post-traumatic stress disorder (PTSD) is associated with neural processing deficits affecting early automatic and later conscious ..

A longitudinal analysis of puberty-related cortical development

Nandita Vijayakumar, George J Youssef, Nicholas B Allen, Vicki Anderson, Daryl Efron, Philip Hazell, Lisa Mundy, Jan M Nicholson, George Patton, Marc L Seal, Julian G Simmons, Sarah Whittle, Tim Silk

Journal article  |  2021  |  NeuroImage

The brain undergoes extensive structural changes during adolescence, concurrent to puberty-related physical and hormonal changes. ..

The gut microbiota in anxiety and depression - A systematic review

Carra A Simpson, Carmela Diaz-Arteche, Djamila Eliby, Orli S Schwartz, Julian G Simmons, Caitlin SM Cowan

Journal article  |  2021  |  Clinical Psychology Review

Growing evidence indicates the community of microorganisms throughout the gastrointestinal tract, (i.e., gut microbiota), is assoc..

Associations between early life stress and anterior pituitary gland volume development during late childhood

Paige Farrow, Julian G Simmons, Elena Pozzi, Carmela Diaz-Arteche, Sally Richmond, Katherine Bray, Orli Schwartz, Sarah Whittle

Journal article  |  2020  |  Psychoneuroendocrinology

Early Life Stress (ELS) is thought to influence Hypothalamic-Pituitary-Adrenal-Axis (HPAA) functioning, contributing to an increas..

Adrenarcheal hormone-related development of white matter during late childhood

Marjolein EA Barendse, Julian G Simmons, Robert E Smith, Marc L Seal, Sarah Whittle

Journal article  |  2020  |  NeuroImage

The aim of the current study was to longitudinally examine how adrenarcheal hormones influence the development of white matter str..

Oral microbiome composition, but not diversity, is associated with adolescent anxiety and depression symptoms

Carra A Simpson, Christina Adler, Mieke R du Plessis, Elizabeth R Landau, Stuart G Dashper, Eric C Reynolds, Orli S Schwartz, Julian G Simmons

Journal article  |  2020  |  Physiology & Behavior

PURPOSE: Depression and anxiety are highly prevalent disorders, whose significant burden is compounded by the presence of oral dis..

Associations between early life stress and anterior pituitary gland volume development - A novel index of long-term hypothalamic-pituitary-adrenal axis functioning

Carmela Diaz-Arteche, Julian G Simmons, Despina E Ganella, Orli Schwartz, Jee Hyun Kim, Paige Farrow, Sarah Whittle

Journal article  |  2020  |  Developmental Psychobiology

Previous research has established associations between early life stress (ELS) and altered pituitary gland volume (PGV) growth dur..

Factor Structure of the Early Adolescent Temperament Questionnaire-Revised

Melissa D Latham, Paul Dudgeon, Marie BH Yap, Julian G Simmons, Michelle L Byrne, Orli S Schwartz, Elizabeth Ivie, Sarah Whittle, Nicholas B Allen

Journal article  |  2020  |  Assessment

Early adolescence (typically aged 9-15 years) is a period of dramatic developmental change, and individual differences in temperam..

The human gut microbiota and depression: widely reviewed, yet poorly understood

Carra A Simpson, Orli S Schwartz, Julian G Simmons

Journal article  |  2020  |  Journal of Affective Disorders

BACKGROUND: A large number of existing reviews have discussed the role of the gut microbiota in affective disorders, though synthe..