John B Williamson, Ph.D.
Associate Professor
Department:
MD-PSYCHIATRY
Business Phone:
(352) 294-4903
Business Email:
john.williamson@neurology.ufl.edu
About John B Williamson
Dr. Williamson has worked to both understand mechanism of brain dysfunction in disorders such as TBI,. PTSD and cerebrovascular disease, and to develop applied solutions to the problems that most impact quality of life in individuals that struggle with these issues.
Clinically, Dr. Williamson focuses on adult populations that have questions of neurological contributions to cognitive impairment. This includes patients with cerebrovascular disease (e.g., stroke) and suspected vascular cognitive impairment, traumatic brain injury, and neurodegenerative diseases (e.g., Alzheimer’s disease).
Dr. Williamson is interested in the role of central and peripheral autonomic nervous system interactions in modifying or regulating brain states and behavioral output. He has VA and DOD funding to understand the mechanistic contribution of white matter injuries in key central autonomic inputs from traumatic brain injury and manifestation of symptoms of post traumatic stress disorder, biomarkers (blood) of TBI subphenotypic outcomes, as well as NIH, McKnight Brain Foundation, and VA funding on intervention developments in cognitive dysfunction associated with healthy aging, Alzheimer’s disease, sleep disruption, and PTSD.
Teaching Profile
Courses Taught
2020
CLP6940 Supervised Teaching
2020-2024
CLP6971 Research for Master’s Thesis
2020
EDG6931 Special Topics
2020-2025
CLP7980 Research for Doctoral Dissertation
2016,2018-2025
CLP6945 Advanced Practicum in Neuropsychology
2020-2025
CLP7979 Advanced Research
2020
PSB6115C Clinical and Cognitive Neuroscience: Methods and Theory
2017
GMS6029 Brain Journal Club
2022-2023
HSC4913 Supervised Research Experience
Board Certifications
-
Clinical NeuropsychologyAmerican Board of Professional Psychology
Publications
Academic Articles
2024
A conceptual framework for a neurophysiological basis of art therapy for PTSD.
Frontiers in human neuroscience.
18
[DOI] 10.3389/fnhum.2024.1351757.
[PMID] 38711802.
2024
Exploring the evocative qualities of masks’ visual imagery and their associations with adversity and trauma.
Frontiers in psychology.
15
[DOI] 10.3389/fpsyg.2024.1337927.
[PMID] 38919795.
2024
Frontal GABA levels associate with musical rhythm production in healthy aging adults.
Brain and cognition.
182
[DOI] 10.1016/j.bandc.2024.106230.
[PMID] 39500073.
2024
Parallel Cerebrospinal Fluid and Serum Temporal Profile Assessment of Axonal Injury Biomarkers Neurofilament-Light Chain and Phosphorylated Neurofilament-Heavy Chain: Associations With Patient Outcome in Moderate-Severe Traumatic Brain Injury.
Journal of neurotrauma.
41(13-14):1609-1627
[DOI] 10.1089/neu.2023.0449.
[PMID] 38588256.
2024
Preliminary evidence of transcutaneous vagus nerve stimulation effects on sleep in veterans with post-traumatic stress disorder.
Journal of sleep research.
33(1)
[DOI] 10.1111/jsr.13891.
[PMID] 37039398.
2024
Semantic processing in older adults is associated with distributed neural activation which varies by association and abstractness of words.
GeroScience.
46(6):6195-6212
[DOI] 10.1007/s11357-024-01216-x.
[PMID] 38822124.
2024
Temporal Profile of Serum Neurofilament Light (NF-L) and Heavy (pNF-H) Level Associations With 6-Month Cognitive Performance in Patients With Moderate-Severe Traumatic Brain Injury.
The Journal of head trauma rehabilitation.
39(6):E470-E480
[DOI] 10.1097/HTR.0000000000000932.
[PMID] 38758056.
2023
Change in medial frontal cerebral metabolite concentrations following bariatric surgery.
NMR in biomedicine.
36(7)
[DOI] 10.1002/nbm.4897.
[PMID] 36628927.
2023
Effects of sleep disturbance on trauma-focused psychotherapy outcomes in posttraumatic stress disorder: A systematic review.
Annals of the New York Academy of Sciences.
1526(1):30-49
[DOI] 10.1111/nyas.15029.
[PMID] 37393069.
2023
Presurgical microstructural coherence predicts cognitive change for bariatric surgery patients.
Obesity (Silver Spring, Md.).
31(9):2325-2334
[DOI] 10.1002/oby.23837.
[PMID] 37605633.
2023
Regional associations of white matter integrity and neurological, post-traumatic stress disorder and autonomic symptoms in Veterans with and without history of loss of consciousness in mild TBI.
Frontiers in neuroimaging.
2
[DOI] 10.3389/fnimg.2023.1265001.
[PMID] 38268858.
2023
Resting-state network functional connectivity before and after bariatric surgery.
Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery.
19(7):673-679
[DOI] 10.1016/j.soard.2022.12.026.
[PMID] 36717308.
2023
The Effects of Transcutaneous Vagus Nerve Stimulation on Functional Connectivity Within Semantic and Hippocampal Networks in Mild Cognitive Impairment.
Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics.
20(2):419-430
[DOI] 10.1007/s13311-022-01318-4.
[PMID] 36477709.
2022
Functional connectivity of brain networks during semantic processing in older adults.
Frontiers in aging neuroscience.
14
[DOI] 10.3389/fnagi.2022.814882.
[PMID] 36337702.
2022
Hemodialyzed Individuals’ Left Spatial Attentional Bias Is Normalized Following Successful Kidney Transplantation.
Cognitive and behavioral neurology : official journal of the Society for Behavioral and Cognitive Neurology.
35(1):32-39
[DOI] 10.1097/WNN.0000000000000290.
[PMID] 35239597.
2022
Music, Mind, Mood, and Mingling in Alzheimer’s Disease and Related Dementias: A Scoping Review.
Journal of Alzheimer's disease : JAD.
86(4):1569-1588
[DOI] 10.3233/JAD-215199.
[PMID] 35253746.
2022
Vertical pseudoneglect: Sensory-attentional versus action-intentional.
Journal of clinical and experimental neuropsychology.
44(2):163-170
[DOI] 10.1080/13803395.2022.2098934.
[PMID] 35819050.
2021
A transcutaneous vagus nerve stimulation study on verbal order memory
Journal of Neurolinguistics.
59
[DOI] 10.1016/j.jneuroling.2021.100990.
2021
Circulating Cytokines Predict 1H-Proton MRS Cerebral Metabolites in Healthy Older Adults.
Frontiers in aging neuroscience.
13
[DOI] 10.3389/fnagi.2021.690923.
[PMID] 34489672.
2021
Hyperarousal symptoms and decreased right hemispheric frontolimbic white matter integrity predict poorer sleep quality in combat-exposed veterans.
Brain injury.
35(8):922-933
[DOI] 10.1080/02699052.2021.1927186.
[PMID] 34053386.
2021
Posttraumatic Stress Disorder and Anxiety-Related Conditions.
Continuum (Minneapolis, Minn.).
27(6):1738-1763
[DOI] 10.1212/CON.0000000000001054.
[PMID] 34881734.
2021
Posttraumatic Stress Disorder Subsequent to Apparent Mild Traumatic Brain Injury.
Cognitive and behavioral neurology : official journal of the Society for Behavioral and Cognitive Neurology.
34(1):26-37
[DOI] 10.1097/WNN.0000000000000264.
[PMID] 33652467.
2021
The Allocation of Vertical Attention in Patients with End-Stage Renal Disease Receiving Dialysis.
Brain sciences.
11(12)
[DOI] 10.3390/brainsci11121549.
[PMID] 34942851.
2020
Age-related changes in the allocation of spatially directed focal attention.
Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition.
27(5):748-764
[DOI] 10.1080/13825585.2019.1675581.
[PMID] 31610738.
2020
Cerebral Metabolite Concentrations Are Associated With Cortical and Subcortical Volumes and Cognition in Older Adults.
Frontiers in aging neuroscience.
12
[DOI] 10.3389/fnagi.2020.587104.
[PMID] 33613261.
2020
History of Alcohol Consumption and HIV Status Related to Functional Connectivity Differences in the Brain During Working Memory Performance
Current HIV Research.
18(3):181-193
[DOI] 10.2174/1570162X18666200217100123.
2020
The Long and the Short of Benzodiazepines and Sleep Medications: Short-Term Benefits, Long-Term Harms?
Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics.
17(1):153-155
[DOI] 10.1007/s13311-019-00827-z.
[PMID] 31907875.
2019
Chronological Effects of Emotional Valence on the Self-selected Retrieval of Autobiographical Memories.
Cognitive and behavioral neurology : official journal of the Society for Behavioral and Cognitive Neurology.
32(1):11-15
[DOI] 10.1097/WNN.0000000000000183.
[PMID] 30896572.
2019
Common pathways and communication between the brain and heart: connecting post-traumatic stress disorder and heart failure.
Stress (Amsterdam, Netherlands).
22(5):530-547
[DOI] 10.1080/10253890.2019.1621283.
[PMID] 31161843.
2019
Hand asymmetries of tactile attention in younger and older adults.
Journal of clinical and experimental neuropsychology.
41(10):1088-1096
[DOI] 10.1080/13803395.2019.1657800.
[PMID] 31441368.
2019
Improved Accuracy on Lateralized Spatial Judgments in Healthy Aging.
Journal of the International Neuropsychological Society : JINS.
25(10):1044-1050
[DOI] 10.1017/S1355617719000900.
[PMID] 31543083.
2019
The Influence of Focused and Sustained Spatial Attention on the Allocation of Spatial Attention.
Journal of the International Neuropsychological Society : JINS.
25(1):65-71
[DOI] 10.1017/S1355617718000802.
[PMID] 30486914.
2018
Age-Related Changes in the Allocation of Vertical Attention.
Journal of the International Neuropsychological Society : JINS.
24(10):1121-1124
[DOI] 10.1017/S1355617718000620.
[PMID] 30165918.
2018
Depressive Symptom Dimensions and Their Association with Hippocampal and Entorhinal Cortex Volumes in Community Dwelling Older Adults.
Frontiers in aging neuroscience.
10
[DOI] 10.3389/fnagi.2018.00040.
[PMID] 29515435.
2018
Discrepancies Between Crystallized and Fluid Ability Are Associated With Frequency of Social and Physical Engagement in Community Dwelling Older Adults
Journal of Clinical and Experimental Neuropsychology.
40(10):963-970
[DOI] 10.1080/13803395.2018.1452195.
2018
Educational Attainment Moderates the Association Between Hippocampal Volumes and Memory Performances in Healthy Older Adults.
Frontiers in aging neuroscience.
10
[DOI] 10.3389/fnagi.2018.00361.
[PMID] 30467475.
2018
Right hemispatial ipsilesional neglect with chronic right hemisphere strokes.
Journal of clinical and experimental neuropsychology.
40(4):347-356
[DOI] 10.1080/13803395.2017.1347606.
[PMID] 28812421.
2018
The effects of left and right monocular viewing on hemispheric activation.
Journal of clinical and experimental neuropsychology.
40(2):198-204
[DOI] 10.1080/13803395.2017.1332169.
[PMID] 28552020.
2018
The influence of rightward and leftward spatial deviations of spatial attention on emotional picture recognition.
Journal of clinical and experimental neuropsychology.
40(9):951-962
[DOI] 10.1080/13803395.2018.1457138.
[PMID] 29690819.
2017
Alterations of Emotional Reactivity Following Righttemporal Lobectomy
Neurocase.
23(5-6):314-320
[DOI] 10.1080/13554794.2017.1416148.
2017
Frontal Gamma-Aminobutyric Acid Concentrations Are Associated With Cognitive Performance in Older Adults.
Biological psychiatry. Cognitive neuroscience and neuroimaging.
2(1):38-44
[DOI] 10.1016/j.bpsc.2016.06.004.
[PMID] 28217759.
2017
Impact of tissue correction strategy on GABA-edited MRS findings.
NeuroImage.
162:249-256
[DOI] 10.1016/j.neuroimage.2017.08.073.
[PMID] 28882635.
2017
Leftward Bias of Visual Attention in Patients with End-Stage Renal Disease Receiving Dialysis: A Neglected Phenomenon.
Cognitive and behavioral neurology : official journal of the Society for Behavioral and Cognitive Neurology.
30(4):176-181
[DOI] 10.1097/WNN.0000000000000142.
[PMID] 29256913.
2017
Non-invasive Vagal Nerve Stimulation Effects on Hyperarousal and Autonomic State in Patients with Posttraumatic Stress Disorder and History of Mild Traumatic Brain Injury: Preliminary Evidence.
Frontiers in medicine.
4
[DOI] 10.3389/fmed.2017.00124.
[PMID] 28824913.
2017
Shifting Spatial Neglect With Repeated Line Bisections: Possible Role of Lateralized Attentional Fatigue.
Cognitive and behavioral neurology : official journal of the Society for Behavioral and Cognitive Neurology.
30(1):30-36
[DOI] 10.1097/WNN.0000000000000118.
[PMID] 28323684.
2016
Allocentric But Not Egocentric Pseudoneglect of Peripersonal Space.
Cognitive and behavioral neurology : official journal of the Society for Behavioral and Cognitive Neurology.
29(1):18-23
[DOI] 10.1097/WNN.0000000000000085.
[PMID] 27008246.
2016
Slowing With End-Stage Renal Disease: Attentive But Unprepared to Acting
International Journal of Psychophysiology.
106:30-38
[DOI] 10.1016/j.ijpsycho.2016.06.002.
2015
Abnormal tactile pressure perception in Parkinson’s disease.
Journal of clinical and experimental neuropsychology.
37(8):808-15
[DOI] 10.1080/13803395.2015.1060951.
[PMID] 26313511.
2015
Cognitive-motor dysfunction after severe traumatic brain injury: A cerebral interhemispheric disconnection syndrome.
Journal of clinical and experimental neuropsychology.
37(10):1062-73
[DOI] 10.1080/13803395.2015.1077930.
[PMID] 26340588.
2015
Global attentional neglect of segmented lines in Parkinson’s disease.
Neurocase.
21(4):501-8
[DOI] 10.1080/13554794.2014.942671.
[PMID] 25073971.
2015
Hemispheric differences in malignant middle cerebral artery stroke.
Journal of the neurological sciences.
353(1-2):20-7
[DOI] 10.1016/j.jns.2015.04.036.
[PMID] 25959980.
2015
Improved verbal learning in the semantic variant of primary progressive aphasia when using semantic cues.
Neurocase.
21(3):345-50
[DOI] 10.1080/13554794.2014.894081.
[PMID] 24611440.
2015
The Effects of Chronic Right Hemispheric Damage on the Allocation of Spatial Attention: Alterations of Accuracy and Reliability.
Journal of the International Neuropsychological Society : JINS.
21(5):373-7
[DOI] 10.1017/S1355617715000338.
[PMID] 26073665.
2015
Which Cheek did the Resurrected Jesus Turn?
Journal of religion and health.
54(3):1091-8
[DOI] 10.1007/s10943-014-9945-9.
[PMID] 25245631.
2014
Agency and the Annunciation.
Journal of religion and health.
53(6):1616-21
[DOI] 10.1007/s10943-013-9725-y.
[PMID] 23674242.
2014
Maladaptive autonomic regulation in PTSD accelerates physiological aging.
Frontiers in psychology.
5
[DOI] 10.3389/fpsyg.2014.01571.
[PMID] 25653631.
2014
The effects of constrained left versus right monocular viewing on the autonomic nervous system.
Biological psychology.
100:79-85
[DOI] 10.1016/j.biopsycho.2014.05.006.
[PMID] 24878321.
2014
The influence of stimulus proximity on judgments of spatial relationships in patients with chronic unilateral right or left hemisphere stroke.
Journal of clinical and experimental neuropsychology.
36(8):787-93
[DOI] 10.1080/13803395.2014.940855.
[PMID] 25350787.
2013
A possible mechanism for PTSD symptoms in patients with traumatic brain injury: central autonomic network disruption
.
2013
A possible mechanism for PTSD symptoms in patients with traumatic brain injury: central autonomic network disruption.
Frontiers in neuroengineering.
6
[DOI] 10.3389/fneng.2013.00013.
[PMID] 24391583.
2013
Hypometric allocentric and egocentric distance estimates in Parkinson disease.
Cognitive and behavioral neurology : official journal of the Society for Behavioral and Cognitive Neurology.
26(3):133-9
[DOI] 10.1097/WNN.0000000000000007.
[PMID] 24077572.
2013
Impaired initial vowel versus consonant letter-word fluency in dementia of the Alzheimer type.
Cognitive neuroscience.
4(3-4):163-70
[DOI] 10.1080/17588928.2013.854200.
[PMID] 24251604.
2013
The blindside: impact of monocular occlusion on spatial attention.
Journal of clinical and experimental neuropsychology.
35(3):291-7
[DOI] 10.1080/13803395.2013.770824.
[PMID] 23419120.
2013
Vertical line quadrisection: “what” it represents and who gets the upper hand.
Brain and language.
127(2):284-8
[DOI] 10.1016/j.bandl.2012.11.003.
[PMID] 23260995.
2012
Conceptual Apraxia in Alzheimer Disease: Impaired Mechanical Knowledge With Preserved Tool Selection Associative Knowledge
.
78
2012
Disengagement Neglect
.
78
2012
Disordered Tactile Force Perception in Parkinson’S Disease
.
78
2012
Famous faces but not remembered spaces influence vertical line bisections.
Journal of clinical and experimental neuropsychology.
34(9):919-24
[DOI] 10.1080/13803395.2012.698600.
[PMID] 22794076.
2012
Ipsilateral neglect from a subcortical lesion: effects of spatial position, distractors, and repeated trials.
Cognitive and behavioral neurology : official journal of the Society for Behavioral and Cognitive Neurology.
25(1):42-9
[DOI] 10.1097/WNN.0b013e3182491465.
[PMID] 22310307.
2012
Ipsilesional Neglect in Right Hemispace With Right Hemisphere Strokes
.
78
2012
Prospective evaluation of the long-term outcomes after deep small-bowel spiral enteroscopy in patients with obscure GI bleeding.
Gastrointestinal endoscopy.
76(4):771-8
[DOI] 10.1016/j.gie.2012.05.025.
[PMID] 22771101.
2012
Proximity Dependent Attentional Biases in Patients With a Chronic Stroke
.
78
2012
Right up there: hemispatial and hand asymmetries of altitudinal pseudoneglect.
Brain and cognition.
79(3):216-20
[DOI] 10.1016/j.bandc.2012.03.003.
[PMID] 22546730.
2012
Risk factors for selective cognitive decline in dialyzed patients with end-stage renal disease: evidence from verbal fluency analysis.
Journal of the International Neuropsychological Society : JINS.
18(1):162-7
[DOI] 10.1017/S1355617711001445.
[PMID] 22088797.
2012
Speed of Global Versus Focal Processing
.
78
2012
The effects of cerebral white matter changes on cardiovascular responses to cognitive and physical activity in a stroke population.
Psychophysiology.
49(12):1618-28
[DOI] 10.1111/j.1469-8986.2012.01467.x.
[PMID] 23095094.
2012
The Effects of Monocular Viewing On Verbal Versus Figural Processing During Focal Versus Global Attention
.
78
2012
The Effects of Monocular Viewing On Verbal Versus Figural Processing During Focal Versus Global Attention
.
78
2012
The relationship between semantic knowledge and conceptual apraxia in Alzheimer disease.
Cognitive and behavioral neurology : official journal of the Society for Behavioral and Cognitive Neurology.
25(4):167-74
[DOI] 10.1097/WNN.0b013e318274ff6a.
[PMID] 23103860.
2011
Alternate but do not swim: a test for executive motor dysfunction in Parkinson disease.
Journal of the International Neuropsychological Society : JINS.
17(4):702-8
[DOI] 10.1017/S1355617711000609.
[PMID] 22882811.
2011
Bimanual-vertical hand movements.
Journal of the International Neuropsychological Society : JINS.
17(4):732-9
[DOI] 10.1017/S135561771100066X.
[PMID] 22882812.
2011
Cyclic alternating pattern in sleep and its relationship to creativity.
Sleep medicine.
12(4):361-6
[DOI] 10.1016/j.sleep.2010.11.009.
[PMID] 21377416.
2011
Ideational apraxia in Parkinson disease.
Cognitive and behavioral neurology : official journal of the Society for Behavioral and Cognitive Neurology.
24(3):122-7
[DOI] 10.1097/WNN.0b013e3182343692.
[PMID] 21945983.
2011
Multicenter randomized clinical trial of donepezil for memory impairment in multiple sclerosis.
Neurology.
77(22):1998-9; author reply1999
[PMID] 22229162.
2011
Multicenter randomized clinical trial of donepezil for memory impairment in multiple sclerosis.
Neurology.
76(17):1500-7
[DOI] 10.1212/WNL.0b013e318218107a.
[PMID] 21519001.
2010
Action-intentional spatial bias in a patient with posterior cortical atrophy.
Neurocase.
16(6):529-34
[DOI] 10.1080/13554794.2010.487827.
[PMID] 20672222.
2010
Autonomic predictors of recovery following surgery: a comparative study.
Autonomic neuroscience : basic & clinical.
156(1-2):60-6
[DOI] 10.1016/j.autneu.2010.03.009.
[PMID] 20451468.
2010
Effects of NREM sleep instability on cognitive processing.
Sleep medicine.
11(8):791-8
[DOI] 10.1016/j.sleep.2010.02.009.
[PMID] 20674488.
2010
Memory performance in adequately dialyzed patients with end-stage renal disease: is there an association with coronary artery bypass grafting?
Journal of clinical and experimental neuropsychology.
32(8):881-9
[DOI] 10.1080/13803391003596454.
[PMID] 20503128.
2010
Program Disparities in Unmatched Internship Applicants
Training and Education in Professional Psychology.
4(2):116-120
[DOI] 10.1037/a0018216.
2010
Regional differences in relationships between apparent white matter integrity, cognition and mood in patients with ischemic stroke.
Journal of clinical and experimental neuropsychology.
32(7):673-81
[DOI] 10.1080/13803390903427406.
[PMID] 20155558.
2008
Baseline differences between vascular cognitive impairment no dementia reverters and non-reverters.
Journal of neurology, neurosurgery, and psychiatry.
79(11):1208-14
[DOI] 10.1136/jnnp.2007.137554.
[PMID] 18477711.
2006
Lateralized visual hallucinations: an analysis of affective valence.
Applied neuropsychology.
13(3):160-5
[PMID] 17361668.
2005
The Ruff Figural Fluency Test: heightened right frontal lobe delta activity as a function of performance.
Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists.
20(4):427-34
[PMID] 15896557.
2003
Case study: Topographical brain mapping in an adolescent diagnosed with expressive aprosodia.
.
10(3)
2003
Functional cerebral asymmetry in hostility: a dual task approach with fluency and cardiovascular regulation.
Brain and cognition.
52(2):167-74
[PMID] 12821098.
2003
Quantitative EEG diagnostic confirmation of expressive aprosodia.
Applied neuropsychology.
10(3):176-81
[PMID] 12890643.
2002
The Psychophysiological Differentiation of Actual, Imagined, and Recollected Mirth
Imagination, Cognition and Personality.
22(2):163-180
[DOI] 10.2190/KL08-1P9C-K9BE-K8VA.
2001
“Delusions” of space: A case study utilizing topographical brain mapping and QEEG.
Journal of Neurotherapy.
4(4):19-29
[DOI] 10.1300/J184v04n04_04.
2001
Grip strength asymmetry in depressed boys.
Neuropsychiatry, neuropsychology, and behavioral neurology.
14(2):130-4
[PMID] 11417667.
Grants
Oct 2024
ACTIVE
Effects of art therapy on symptoms of PTSD after mild TBI and indicators of neurophysiological response: A mixed methods feasibility study.
Role: Principal Investigator
Funding: HENRY M JACKSON FOUNDATION
via US NATL ENDOW FOR THE ARTS
Aug 2024
ACTIVE
Mechanism, connectivity, and outcome prediction of anxiety intervention from MRI-derived models in tDCS augmented cognitive training
Role: Other
Funding: NATL INST OF HLTH NIA
Mar 2024
ACTIVE
WISE II – Obesity and Type-2 Diabetes: Bariatric Surgery Effects on Brain Function
Role: Principal Investigator
Funding: NATL INST OF HLTH NIDDK
Jan 2024
– Apr 2024
NFFRE-Gainesville MOU for Sarah Bottari (Biomarker-Based Precision Medicine Approach to Traumatic Brain Injury Subphenotypes)
Role: Other
Funding: NORTH FL FOU FOR RES AND EDU
via US DEPT OF DEFENSE
Nov 2023
ACTIVE
IPA – Jennifer Dehart
Role: Other
Funding: US DEPT OF VET AFF GAINESVILLE MED CTR
May 2023
ACTIVE
Cognitively engaging walking exercise and neuromodulation to enhance brain function in older adults
Role: Co-Investigator
Funding: NATL INST OF HLTH NIA
May 2023
– Dec 2023
Effects of art therapy on symptoms of PTSD after mild TBI and indicators of neurophysiological response: A mixed methods feasibility study
Role: Principal Investigator
Funding: HENRY M JACKSON FOUNDATION
via US NATL ENDOW FOR THE ARTS
Sep 2022
ACTIVE
Gap-based Milieu Biomarkers for Traumatic Brain Injury (GAMBIT- TBI)
Role: Principal Investigator
Funding: STATE UNIV OF NEW YORK RES FOU
via US ARMY MED RES ACQUISITION
Aug 2022
– May 2023
NFFRE-Gainesville MOU for Robert Claar
Role: Other
Funding: NORTH FL FOU FOR RES AND EDU
via US DEPT OF DEFENSE
Aug 2022
– May 2023
NFFRE-Gainesville MOU for Samantha Penhale
Role: Other
Funding: NORTH FL FOU FOR RES AND EDU
via US DEPT OF DEFENSE
Jun 2022
– Apr 2023
Effects of art therapy on symptoms of PTSD after mild TBI and indicators of neurophysiological response: A mixed methods feasibility study
Role: Principal Investigator
Funding: HENRY M JACKSON FOUNDATION
via US NATL ENDOW FOR THE ARTS
Dec 2021
– Aug 2022
VA-IPA for Brianna Akers
Role: Other
Funding: US DEPT OF VET AFF GAINESVILLE MED CTR
Sep 2021
ACTIVE
Interventions to improve alcohol-related comorbidities along the gut-brain axis in persons with HIV infection
Role: Co-Investigator
Funding: NATL INST OF HLTH NIAAA
Sep 2021
ACTIVE
Pairing tVNS and exposure and response prevention to improve symptoms of OCD
Role: Principal Investigator
Funding: INTL OCD FOUNDATION
Sep 2021
– Jun 2022
Effects of art therapy on symptoms of PTSD after TBI and indicators of neurophysiological response: A mixed methods feasibility study
Role: Principal Investigator
Funding: HENRY M JACKSON FOUNDATION
via US NATL ENDOW FOR THE ARTS
Sep 2020
ACTIVE
Transcutaneous vagal nerve stimulation modulation of sleep quality and emotion in mild TBI and PTSD
Role: Principal Investigator
Funding: US DEPT OF VET AFF GAINESVILLE MED CTR
May 2020
– Apr 2022
Biomarker-Based Precision Medicine Approach to Traumatic Brain Injury Subphenotypes
Role: Other
Funding: NORTH FL FOU FOR RES AND EDU
via US ARMY MED RES ACQUISITION
Nov 2019
– Apr 2020
NFFRE-Gainesville JPA for Brianna Akers
Role: Other
Funding: NORTH FL FOU FOR RES AND EDU
via US DEPT OF DEFENSE
Oct 2019
– Sep 2023
Transcutaneous vagal nerve stimulation and cognitive training to enhance cognitive performance in healthy older adults
Role: Principal Investigator
Funding: MCKNIGHT BRAIN RESEARCH FOU
Sep 2019
– Sep 2019
NFFRE-Gainesville JPA for Jennifer Archer
Role: Principal Investigator
Funding: NORTH FL FOU FOR RES AND EDU
via US DEPT OF DEFENSE
May 2019
– Apr 2022
Biomarker-Based Precision Medicine Approach to Traumatic Brain Injury Subphenotypes
Role: Principal Investigator
Funding: NORTH FL FOU FOR RES AND EDU
via US ARMY MED RES AND DEVELOPMENT COMMAND
Sep 2018
– May 2024
Role of Gut Microbial Dysbiosis and Aging on HIV-associated Neurocognitive and Brain Dysfunction
Role: Co-Investigator
Funding: UNIVERSITY OF LOUISVILLE RES FOU
via NATL INST OF HLTH NIA
Sep 2017
– May 2022
Treatment of mild cognitive impairment with transcutaneous vagal nerve stimulation
Role: Principal Investigator
Funding: NATL INST OF HLTH NIA
Jul 2017
– Jun 2021
Non-invasive vagal nerve stimulation and sleep
Role: Principal Investigator
Funding: US DEPT OF VET AFF GAINESVILLE MED CTR
Jul 2016
– Jun 2017
ALZHEIMERS DISEASE INITIATIVE MEMORY DISORDER CLINIC 2016-2017
Role: Faculty
Funding: FL DEPT OF ELDER AFFAIRS
Sep 2015
– Aug 2019
Brain and cognition effects of cardio resynchronization therapy in heart failure
Role: Principal Investigator
Funding: NATL INST OF HLTH NHLBI
Education
National Institute of Aging NRSA
2006-2008
·
University of Illinois
Fellowship: Clinical Neuropsychology
2004-2006
·
University of Illinois
Internship
2003-2004
·
University of Chicago
PhD
2000-2004
·
Virginia Polytechnic Institute and State University
Master of Science
1996-2000
·
Virginia Polytechnic Institute and State University
BA, Psychology
1992-1996
·
Florida State University
Contact Details
Phones:
- Business:
- (352) 294-4903
Emails:
- Business:
- john.williamson@neurology.ufl.edu
Addresses:
- Business Mailing:
-
PO Box 103424
GAINESVILLE FL 32610 - Business Street:
-
Department of Psychiatry
McKnight Brain Institute
Center for OCD and Anxiety Related Disorders
GAINESVILLE FL 326100001