Adjunct Faculty
Adjunct faculty typically have an academic or research appointment at another institution and contribute or collaborate with one or more School of Medicine faculty members or programs.
Adjunct rank detailsChadi Abdallah, MD
Associate Professor Adjunct of PsychiatryAbout
Research
Publications
2025
Dynamic and Static Resting-State Functional Connectivity of Canonical Networks in Military and Civilian Populations with Posttraumatic Stress Disorder and/or Mild Traumatic Brain Injury
Dwulit A, Sun D, Haswell C, Hussain A, Dennis E, Wilde E, Newsome M, Tate D, Walker W, Abdallah C, Averill C, Blackford J, Olatunji B, King A, Liberzon I, Angstadt M, Rektor I, Říha P, Nečasová M, Fňašková M, Daniels J, Walter H, Manthey A, Sierk A, Olff M, van Zuiden M, Koch S, Veltman D, Frijiling J, Nawijn L, Jahanshad N, Thompson P, Morey R. Dynamic and Static Resting-State Functional Connectivity of Canonical Networks in Military and Civilian Populations with Posttraumatic Stress Disorder and/or Mild Traumatic Brain Injury. Biological Psychiatry Cognitive Neuroscience And Neuroimaging 2025 PMID: 40840859, DOI: 10.1016/j.bpsc.2025.08.002.Peer-Reviewed Original ResearchMild traumatic brain injuryPosttraumatic stress disorderDynamic functional connectivityStatic resting-state functional connectivitySalience networkStatic functional connectivityTraumatic brain injuryCentral executiveStress disorderComorbid subjectsFunctional connectivityFunctional connectomeMild traumatic brain injury groupInteraction effects of diagnosisAnxiety-related effectsExternally focused statesInteraction of diagnosisCanonical resting state networksBrain injuryEffect of diagnosisInteraction effectsDefault modeControl subjectsMilitary veteransDiagnostic groupsThe generative AI blueprint: modeling brain and behavior in concert
Abdallah C, van Dijk D. The generative AI blueprint: modeling brain and behavior in concert. Neuropsychopharmacology 2025, 1-2. PMID: 40817169, DOI: 10.1038/s41386-025-02196-y.Peer-Reviewed Original ResearchData‐Driven Approach to Dynamic Resting State Functional Connectivity in Post‐Traumatic Stress Disorder: An ENIGMA‐PGC PTSD Study
Tomas C, Fitzgerald J, Baird C, Haswell C, Abdallah C, Angstadt M, Baker J, Berg H, Blackford J, Cisler J, Cotton A, Daniels J, Davenport N, Davidson R, deRoon‐Cassini T, Disner S, Hage W, Fani N, Frijling J, Gordon E, Grupe D, He X, Herringa R, Hofmann D, Huggins A, Hussain A, Ipser J, Jahanshad N, Jovanovic T, Kaufman M, Kim Y, King A, Koch S, Koopowitz S, Lazarov A, Lebois L, Liberzon I, Lissek S, Manthey A, May G, McLaughlin K, Nawijn L, Nelson S, Neria Y, Nitschke J, Olatunji B, Olff M, Peverill M, Quidé Y, Ravid O, Ressler K, Ross M, Salminen L, Sambrook K, Shih C, Sierk A, Sponheim S, Stein D, Stevens J, Straube T, Suarez‐Jimenez B, Thompson P, van der Wee N, van der Werff S, van Rooij S, van Zuiden M, Veltman D, Vermeiren R, Walter H, Wang X, Xie H, Zhu X, Zilcha‐Mano S, Larson C, Morey R. Data‐Driven Approach to Dynamic Resting State Functional Connectivity in Post‐Traumatic Stress Disorder: An ENIGMA‐PGC PTSD Study. Human Brain Mapping 2025, 46: e70116. PMID: 40736265, PMCID: PMC12308910, DOI: 10.1002/hbm.70116.Peer-Reviewed Original ResearchConceptsPosttraumatic stress disorderFunctional magnetic resonance imagingBrain network dynamicsFunctional connectivityStress disorderTrauma typesBrain networksHeterogeneity of posttraumatic stress disorderSymptoms of posttraumatic stress disorderPost-traumatic stress disorderGroup independent component analysisNo group differencesIndependent component analysisResting-state networksStatic functional connectivityBrain network characteristicsMulti-cohort sampleData-driven analytic approachSample of traumaSymptom profilesConnectivity statesDiagnostic groupsGroup differencesStatic FCCognitive demandsStructural covariance of early visual cortex is negatively associated with PTSD symptoms: A Mega-Analysis from the ENIGMA PTSD workgroup.
Harnett N, Joshi S, Kumar P, Russell C, Dillon D, Baker J, Pizzagalli D, Kaufman M, Nickerson L, Jahanshad N, Salminen L, Thomopoulos S, Frijling J, Veltman D, Koch S, Nawijn L, van Zuiden M, Zhu Y, Li G, Ipser J, Zhu X, Ravid O, Zilcha-Mano S, Lazarov A, Suarez-Jimenez B, Sun D, Hussain A, Huggins A, Jovanovic T, van Rooij S, Fani N, Hudson A, Sierk A, Manthey A, Walter H, van der Wee N, van der Werff S, Vermeiren R, Říha P, Lebois L, Rosso I, Olson E, Liberzon I, Angstadt M, Disner S, Sponheim S, Koopowitz S, Hofmann D, Qi R, Maron-Katz A, Kunch A, Xie H, El-Hage W, Berg H, Bruce S, McLaughlin K, Peverill M, Sambrook K, Ross M, Herringa R, Nitschke J, Davidson R, deRoon-Cassini T, Tomas C, Fitzgerald J, Blackford J, Olatunji B, Nelson S, Gordon E, Densmore M, Théberge J, Neufeld R, Olff M, Wang L, Stein D, Neria Y, Stevens J, Mueller S, Daniels J, Rektor I, King A, Davenport N, Straube T, Lu G, Etkin A, Wang X, Quidé Y, Lissek S, Cisler J, Grupe D, Larson C, Feola B, May G, Abdallah C, Lanius R, Thompson P, Morey R, Ressler K. Structural covariance of early visual cortex is negatively associated with PTSD symptoms: A Mega-Analysis from the ENIGMA PTSD workgroup. Biological Psychiatry Cognitive Neuroscience And Neuroimaging 2025 PMID: 40712699, PMCID: PMC12404044, DOI: 10.1016/j.bpsc.2025.07.005.Peer-Reviewed Original ResearchAssociated with PTSD symptomsPosttraumatic stress disorderEarly visual cortexStructural covariancePTSD symptomsNeural signaturesHuman Connectome Project Young AdultTrauma survivorsHeterogeneous sampleSample of trauma-exposedPosttraumatic stress disorder symptomsHuman Connectome Project Young Adult datasetVisual cortexMarker of vulnerabilityEarly visual regionsYoung adultsPosttrauma psychopathologyTrauma-exposedChildhood maltreatmentPTSD developmentStress disorderDepressive symptomsPrecision psychiatrySymptom-specificPerceived stressA whole-brain voxel-based analysis of structural abnormalities in PTSD: An ENIGMA-PGC study
See C, Si S, Baird C, Haswell C, Hussain A, Olff M, Veltman D, Frijling J, van Zuiden M, Koch S, Nawijn L, Wang L, Zhu Y, Li G, Neria Y, Zhu X, Suarez-Jimenez B, Zilcha-Mano S, Lazarov A, Stevens J, Ressler K, Fani N, Jovanovic T, van Rooij S, Kaufman M, Lebois L, Rosso I, Olson E, Baker J, Sponheim S, Disner S, Davenport N, Etkin A, Maron-Katz A, Stein M, Shenton M, Stein D, Ipser J, Koopowitz S, Seedat S, du Plessis S, van den Heuvel L, Lissek S, Berg H, Straube T, Hofman D, Baugh L, Forster G, Simons R, Simons J, Magnotta V, Fercho K, Wang X, Cotton A, O'Leary E, Xie H, Grupe D, Nitschke J, Davidson R, Larson C, deRoon-Cassini T, Tomas C, Fitzgerald J, Blackford J, Olatunji B, Gordon E, May G, Nelson S, Lanius R, Théberge J, Densmore M, Neufeld R, Abdallah C, Averill C, Harpaz-Rotem I, Levy I, Krystal J, Geuze E, van Lutterveld R, Dennis E, Tate D, Cifu D, Walker W, Wilde E, van der Wee N, Vermeiren R, van der Werff S, McLaughlin K, Sambrook K, Peverill M, Radua J, Salminen L, Jahanshad N, Thomopoulos S, James A, Valmaggia L, Thompson P, Morey R, Kempton M. A whole-brain voxel-based analysis of structural abnormalities in PTSD: An ENIGMA-PGC study. European Psychiatry 2025, 68: e97. PMID: 40692500, PMCID: PMC12344465, DOI: 10.1192/j.eurpsy.2025.10062.Peer-Reviewed Original ResearchConceptsPosttraumatic stress disorder patientsPosttraumatic stress disorderAssociated with GM volumeWhole-brain voxel-based analysisVoxel-based morphometryRegional brain volumesGM volumeBrain volumeDepression severityWhole-brainPosttraumatic stress disorder severityWhole-brain statistical mapsCerebellar WM volumeTrauma-exposed controlsStructural neuroimaging scansSuperior frontal gyrusGray matterStatistical mapsVoxel-wise differencesAnalysis of structural abnormalitiesFrontal gyrusTrauma exposureMemory processesStress disorderWhite matterFunctional connectome-based predictive modeling of suicidal ideation
Averill L, Tamman A, Fouda S, Averill C, Nemati S, Ragnhildstveit A, Gosnell S, Akiki T, Salas R, Abdallah C. Functional connectome-based predictive modeling of suicidal ideation. Journal Of Affective Disorders 2025, 387: 119518. PMID: 40441623, DOI: 10.1016/j.jad.2025.119518.Peer-Reviewed Original ResearchConceptsSuicidal ideationAssociated with increased suicidal ideationRecurrent major depressive disorderConnectome-based predictive modelingResting-state functional magnetic resonance imagingMechanisms of suicidal behaviorAssociated with suicidal ideationFunctional magnetic resonance imagingMajor depressive disorderDorsal salience networkIncreased suicidal ideationIncreased network integrationIncreased suicide riskThe Menninger ClinicNetwork integrationReduced network integrationRelative to controlsCentral executiveDepressive disorderDepressive episodeSalience networkNeural alterationsSuicidal behaviorSuicide riskBrain networksGenerative AI Models for Developing Neuroimaging Markers of Psychiatric Disorders
Abdallah C, van Dijk D. Generative AI Models for Developing Neuroimaging Markers of Psychiatric Disorders. Biological Psychiatry 2025 PMID: 40348311, DOI: 10.1016/j.biopsych.2025.05.002.Peer-Reviewed Original Research159. Transformer-Based Foundation Model for Functional Neuroimaging
Akiki T, Tripathy M, Zhang X, Pines A, Ortega J, Rizvi S, Averill C, van Dijk D, Abdallah C, Williams L. 159. Transformer-Based Foundation Model for Functional Neuroimaging. Biological Psychiatry 2025, 97: s160-s161. DOI: 10.1016/j.biopsych.2025.02.396.Peer-Reviewed Original Research
2024
Synaptic fidelity for drug development: is it time to move beyond glutamate release and receptors?
Abdallah C, Tamman A. Synaptic fidelity for drug development: is it time to move beyond glutamate release and receptors? Expert Opinion On Therapeutic Targets 2024, 28: 651-653. PMID: 39099083, PMCID: PMC11357897, DOI: 10.1080/14728222.2024.2389201.Peer-Reviewed Original ResearchMedial prefrontal cortex neurotransmitter abnormalities in posttraumatic stress disorder with and without comorbidity to major depression
Swanberg K, Prinsen H, Averill C, Campos L, Kurada A, Krystal J, Petrakis I, Averill L, Rothman D, Abdallah C, Juchem C. Medial prefrontal cortex neurotransmitter abnormalities in posttraumatic stress disorder with and without comorbidity to major depression. NMR In Biomedicine 2024, 37: e5220. PMID: 39054694, DOI: 10.1002/nbm.5220.Peer-Reviewed Original ResearchPosttraumatic stress disorderMedial prefrontal cortexStress disorderPosttraumatic stress disorder patientsPosttraumatic stress disorder diagnosisChronic psychiatric conditionImpact of psychiatric comorbiditiesComorbid MDDPrefrontal cortexDepressive disorderTraumatic stressorsPsychiatric conditionsMDDPsychiatric comorbiditiesNeurotransmitter abnormalitiesConcentrations of glutamateMetabolite abnormalitiesHealthy controlsDisordersPattern of abnormalitiesParticipantsGlutamateIn vivo protonMetabolic abnormalitiesDepression