Keith McGregor PhD

Department of Neurology
Associate Professor

Academic Appointment

Assistant Professor, Neurology, Emory University
Adjunct Assistant Professor, Neurology, University of Florida

Education

Degrees

PhD from University of Florida
MS from University of Florida
AB from College of the Holy Cross

Research

Focus

My research program investigates the effects of an aerobic exercise on motor performance in the upper extremity using modern neuroimaging techniques. I use multimodality neurophysiological methods to investigate the effects of aerobic activity on interhemispheric communication. My expertise is in functional magnetic resonance imaging (fMRI), and transcranial magnetic stimulation (TMS).

Publications

A Narrative Review of the Efficacy of Long COVID Interventions on Brain Fog, Processing Speed, and Other Related Cognitive Outcomes.
Biomedicines Volume: 13
02/10/2025 Authors: Whitaker-Hardin B; McGregor KM; Uswatte G; Lokken K
Graded Intensity Aerobic Exercise to Improve Cerebrovascular Function and Performance in Older Veterans: Protocol for a Randomized Controlled Trial.
JMIR Res Protoc Volume: 13 Page(s): e58316
09/26/2024 Authors: Bello MO; Mammino KM; Vernon MA; Wakeman DG; Denmon CA; Krishnamurthy LC; Krishnamurthy V; McGregor KM; Novak TS; Nocera JR
GABA, Aging and Exercise: Functional and Intervention Considerations.
Neurosci Insights Volume: 19 Page(s): 26331055241285880
01/01/2024 Authors: Novak TS; McGregor KM; Krishnamurthy LC; Evancho A; Mammino K; Walters CE; Weber A; Nocera JR
Examination of acute spin exercise on GABA levels in aging and stroke: The EASE study protocol.
PLoS One Volume: 19 Page(s): e0297841
01/01/2024 Authors: McGregor KM; Novak T; Nocera JR; Mammino K; Wolf SL; Krishnamurthy LC
Urinary incontinence-related effects on functional connectivity circuits in persons with Parkinson's disease.
Neurourol Urodyn Volume: 42 Page(s): 1694 - 1701
11/01/2023 Authors: Denmon C; Wakeman DG; Vernon M; McGregor K; Krishnamurthy V; Krishnamurthy L; Stevens J; Vaughan CP
Rostral anterior cingulate connectivity in older adults with subthreshold depressive symptoms: A preliminary study.
Aging Brain Volume: 3 Page(s): 100059
01/01/2023 Authors: Gradone AM; Champion G; McGregor KM; Nocera JR; Barber SJ; Krishnamurthy LC; Dotson VM
Associations between Duration of Homelessness and Cardiovascular Risk Factors: A Pilot Study.
Int J Environ Res Public Health Volume: 19
11/09/2022 Authors: Gao J; Qu H; McGregor KM; Yadav AS; Yuen HK
Effects of exercise on the sleep microarchitecture in the aging brain: A study on a sedentary sample.
Front Syst Neurosci Volume: 16 Page(s): 855107
01/01/2022 Authors: Cassim TZ; McGregor KM; Nocera JR; Garca VV; Sinon CG; Kreuzer M; Garca PS
The Relationship Between Resting Cerebral Blood Flow, Neurometabolites, Cardio-Respiratory Fitness and Aging-Related Cognitive Decline.
Front Psychiatry Volume: 13 Page(s): 923076
01/01/2022 Authors: Krishnamurthy V; Paredes Spir I; Mammino KM; Nocera JR; McGregor KM; Crosson BA; Krishnamurthy LC
Reduced Interference and Serial Dependency Effects for Naming in Older but Not Younger Adults after 1 Hz rTMS of Right Pars Triangularis.
Neurobiol Lang (Camb) Volume: 3 Page(s): 256 - 271
01/01/2022 Authors: Drucker JH; Epstein CM; McGregor KM; Hortman K; Gopinath KS; Crosson B
Integrative learning for population of dynamic networks with covariates.
Neuroimage Volume: 236 Page(s): 118181
08/01/2021 Authors: Kundu S; Ming J; Nocera J; McGregor KM
Smaller spared subcortical nuclei are associated with worse post-stroke sensorimotor outcomes in 28 cohorts worldwide.
Brain Commun Volume: 3 Page(s): fcab254
01/01/2021 Authors: Liew S-L; Zavaliangos-Petropulu A; Schweighofer N; Jahanshad N; Lang CE; Lohse KR; Banaj N; Barisano G; Baugh LA; Bhattacharya AK
Not All Lesioned Tissue Is Equal: Identifying Pericavitational Areas in Chronic Stroke With Tissue Integrity Gradation via T2w T1w Ratio.
Front Neurosci Volume: 15 Page(s): 665707
01/01/2021 Authors: Krishnamurthy LC; Krishnamurthy V; Rodriguez AD; McGregor KM; Glassman CN; Champion GS; Rocha N; Harnish SM; Belagaje SR; Kundu S
The effect of time since stroke, gender, age, and lesion size on thalamus volume in chronic stroke: a pilot study.
Sci Rep Volume: 10 Page(s): 20488
11/24/2020 Authors: Krishnamurthy LC; Champion GN; McGregor KM; Krishnamurthy V; Turabi A; Roberts SR; Nocera JR; Borich MR; Rodriguez AD; Belagaje SR
Correcting Task fMRI Signals for Variability in Baseline CBF Improves BOLD-Behavior Relationships: A Feasibility Study in an Aging Model.
Front Neurosci Volume: 14 Page(s): 336
01/01/2020 Authors: Krishnamurthy V; Krishnamurthy LC; Drucker JH; Kundu S; Ji B; Hortman K; Roberts SR; Mammino K; Tran SM; Gopinath K
Effects of Combined Aerobic Exercise and Cognitive Training on Verbal Fluency in Older Adults.
Gerontol Geriatr Med Volume: 6 Page(s): 2333721419896884
01/01/2020 Authors: Nocera JR; Mammino K; Kommula Y; Wharton W; Crosson B; McGregor KM
Differences in dietary recall and subjective physical functioning status in stroke survivors with self-reported cognitive impairment.
Top Stroke Rehabil Volume: 26 Page(s): 307 - 311
05/01/2019 Authors: Kelleher JL; Rodriguez AD; McGregor KM; Serra MC
Internally Guided Lower Limb Movement Recruits Compensatory Cerebellar Activity in People With Parkinson's Disease.
Front Neurol Volume: 10 Page(s): 537
01/01/2019 Authors: Drucker JH; Sathian K; Crosson B; Krishnamurthy V; McGregor KM; Bozzorg A; Gopinath K; Krishnamurthy LC; Wolf SL; Hart AR
Task-residual functional connectivity of language and attention networks.
Brain Cogn Volume: 122 Page(s): 52 - 58
04/01/2018 Authors: Tran SM; McGregor KM; James GA; Gopinath K; Krishnamurthy V; Krishnamurthy LC; Crosson B
Effects of a 12-Week Aerobic Spin Intervention on Resting State Networks in Previously Sedentary Older Adults.
Front Psychol Volume: 9 Page(s): 2376
01/01/2018 Authors: McGregor KM; Crosson B; Krishnamurthy LC; Krishnamurthy V; Hortman K; Gopinath K; Mammino KM; Omar J; Nocera JR
Advances in neurocognitive rehabilitation research from 1992 to 2017: The ascension of neural plasticity.
Neuropsychology Volume: 31 Page(s): 900 - 920
11/01/2017 Authors: Crosson B; Hampstead BM; Krishnamurthy LC; Krishnamurthy V; McGregor KM; Nocera JR; Roberts S; Rodriguez AD; Tran SM
Influences of 12-Week Physical Activity Interventions on TMS Measures of Cortical Network Inhibition and Upper Extremity Motor Performance in Older Adults-A Feasibility Study.
Front Aging Neurosci Volume: 9 Page(s): 422
01/01/2017 Authors: McGregor KM; Crosson B; Mammino K; Omar J; Garca PS; Nocera JR
Changes in Cortical Activation Patterns in Language Areas following an Aerobic Exercise Intervention in Older Adults.
Neural Plast Volume: 2017 Page(s): 6340302
01/01/2017 Authors: Nocera J; Crosson B; Mammino K; McGregor KM
Changes in Cortical Activation Patterns in Language Areas Following Aerobic Exercise in Older Adults: 446 Board #283 June 1, 9: 30 AM - 11: 00 AM.
Med Sci Sports Exerc Volume: 48 Page(s): 126
05/01/2016 Authors: Nocera J; McGregor K; Crosson B
THE EFFECTIVENESS OF COMBINING COGNITIVE TRAINING AND EXERCISE TO IMPROVE FUNCTION IN SEDENTARY OLDER ADULTS
GERONTOLOGIST Volume: 55 Page(s): 144 - 144
11/01/2015 Authors: Nocera J; McGregor K; Crosson B
Reliability of negative BOLD in ipsilateral sensorimotor areas during unimanual task activity.
Brain Imaging Behav Volume: 9 Page(s): 245 - 254
06/01/2015 Authors: McGregor KM; Sudhyadhom A; Nocera J; Seff A; Crosson B; Butler AJ
Broca's area - thalamic connectivity.
Brain Lang Volume: 141 Page(s): 80 - 88
02/01/2015 Authors: Bohsali AA; Triplett W; Sudhyadhom A; Gullett JM; McGregor K; FitzGerald DB; Mareci T; White K; Crosson B
Spin exercise improves semantic fluency in previously sedentary older adults.
J Aging Phys Act Volume: 23 Page(s): 90 - 94
01/01/2015 Authors: Nocera JR; McGregor KM; Hass CJ; Crosson B
Self-reported physical activity and objective aerobic fitness: differential associations with gray matter density in healthy aging.
Front Aging Neurosci Volume: 7 Page(s): 5
01/01/2015 Authors: Zlatar ZZ; McGregor KM; Towler S; Nocera JR; Dzierzewski JM; Crosson B
The relevance of aging-related changes in brain function to rehabilitation in aging-related disease.
Front Hum Neurosci Volume: 9 Page(s): 307
01/01/2015 Authors: Crosson B; McGregor KM; Nocera JR; Drucker JH; Tran SM; Butler AJ
Context-Dependent Neural Activation: Internally and Externally Guided Rhythmic Lower Limb Movement in Individuals With and Without Neurodegenerative Disease.
Front Neurol Volume: 6 Page(s): 251
01/01/2015 Authors: Hackney ME; Lee HL; Battisto J; Crosson B; McGregor KM
A Behavioral Manipulation Engages Right Frontal Cortex During Aphasia Therapy.
Neurorehabil Neural Repair Volume: 28 Page(s): 545 - 553
07/01/2014 Authors: Benjamin ML; Towler S; Garcia A; Park H; Sudhyadhom A; Harnish S; McGregor KM; Zlatar Z; Reilly JJ; Rosenbek JC
Functional language networks in sedentary and physically active older adults.
J Int Neuropsychol Soc Volume: 19 Page(s): 625 - 634
07/01/2013 Authors: Zlatar ZZ; Towler S; McGregor KM; Dzierzewski JM; Bauer A; Phan S; Cohen M; Marsiske M; Manini TM; Crosson B
Delineation of motor and somatosensory thalamic subregions utilizing probabilistic diffusion tractography and electrophysiology.
J Magn Reson Imaging Volume: 37 Page(s): 600 - 609
03/01/2013 Authors: Sudhyadhom A; McGregor K; Okun MS; Foote KD; Trinastic J; Crosson B; Bova FJ
Effects of aerobic fitness on aging-related changes of interhemispheric inhibition and motor performance.
Front Aging Neurosci Volume: 5 Page(s): 66
01/01/2013 Authors: McGregor KM; Nocera JR; Sudhyadhom A; Patten C; Manini TM; Kleim JA; Crosson B; Butler AJ
Broca's area and its striatal and thalamic connections: a diffusion-MRI tractography study.
Front Neuroanat Volume: 7 Page(s): 8
01/01/2013 Authors: Ford AA; Triplett W; Sudhyadhom A; Gullett J; McGregor K; Fitzgerald DB; Mareci T; White K; Crosson B
AGING, AEROBIC ACTIVITY AND INTERHEMISPHERIC COMMUNICATION
Page(s): 86 - 86
01/01/2013 Authors: McGregor K; Heilman K; Nocera J; Patten C; Manini T; Crosson B; Butler A
Aging, aerobic activity and interhemispheric communication.
Brain Sci Volume: 2 Page(s): 634 - 648
11/16/2012 Authors: McGregor KM; Heilman KM; Nocera JR; Patten C; Manini TM; Crosson B; Butler AJ
COGNITIVE AND STRUCTURAL BRAIN CORRELATES OF PHYSICAL ACTIVITY AND FITNESS IN HEALTHY AGING
GERONTOLOGIST Volume: 52 Page(s): 579 - 579
11/01/2012 Authors: Zlatar ZZ; McGregor K; Dzierzewski JM; Marsiske M; Manini T; Crosson B
Motor map reliability and aging: a TMS/fMRI study.
Exp Brain Res Volume: 219 Page(s): 97 - 106
05/01/2012 Authors: McGregor KM; Carpenter H; Kleim E; Sudhyadhom A; White KD; Butler AJ; Kleim J; Crosson B
Impact of changed positive and negative task-related brain activity on word-retrieval in aging.
Neurobiol Aging Volume: 33 Page(s): 656 - 669
04/01/2012 Authors: Meinzer M; Seeds L; Flaisch T; Harnish S; Cohen ML; McGregor K; Conway T; Benjamin M; Crosson B
Physical activity and neural correlates of aging: a combined TMS/fMRI study.
Behav Brain Res Volume: 222 Page(s): 158 - 168
09/12/2011 Authors: McGregor KM; Zlatar Z; Kleim E; Sudhyadhom A; Bauer A; Phan S; Seeds L; Ford A; Manini TM; White KD
Structural connectivity of Broca's area and medial frontal cortex.
Neuroimage Volume: 52 Page(s): 1230 - 1237
10/01/2010 Authors: Ford A; McGregor KM; Case K; Crosson B; White KD
An fMRI study of the differences in brain activity during active ankle dorsiflexion and plantarflexion.
Brain Imaging Behav Volume: 4 Page(s): 121 - 131
06/01/2010 Authors: Trinastic JP; Kautz SA; McGregor K; Gregory C; Bowden M; Benjamin MB; Kurtzman M; Chang YL; Conway T; Crosson B
Functional imaging and related techniques: an introduction for rehabilitation researchers.
J Rehabil Res Dev Volume: 47 Page(s): vii - xxxiv
01/01/2010 Authors: Crosson B; Ford A; McGregor KM; Meinzer M; Cheshkov S; Li X; Walker-Batson D; Briggs RW
Regional changes in word-production laterality after a naming treatment designed to produce a rightward shift in frontal activity.
Brain Lang Volume: 111 Page(s): 73 - 85
11/01/2009 Authors: Crosson B; Moore AB; McGregor KM; Chang Y-L; Benjamin M; Gopinath K; Sherod ME; Wierenga CE; Peck KK; Briggs RW
NONFLUENT APHASIA: THE RELATIONSHIP BETWEEN DEGREE OF LEFT-HEMISPHERE LESION, HOMOLOGOUS BRAIN ACTIVITY, AND PERFORMANCE
GERONTOLOGIST Volume: 49 Page(s): 146 - 147
10/01/2009 Authors: Zlatar ZZ; Levy IF; Benjamin M; McGregor K; Cohen M; Trinastic J; Crosson B
Selective detrending method for reducing task-correlated motion artifact during speech in event-related FMRI.
Hum Brain Mapp Volume: 30 Page(s): 1105 - 1119
04/01/2009 Authors: Gopinath K; Crosson B; McGregor K; Peck K; Chang Y-L; Moore A; Sherod M; Cavanagh C; Wabnitz A; Wierenga C
Discriminating brain activity from task-related artifacts in functional MRI: fractal scaling analysis simulation and application.
Neuroimage Volume: 40 Page(s): 197 - 212
03/01/2008 Authors: Lee J-M; Hu J; Gao J; Crosson B; Peck KK; Wierenga CE; McGregor K; Zhao Q; White KD
Functional MRI of language in aphasia: a review of the literature and the methodological challenges.
Neuropsychol Rev Volume: 17 Page(s): 157 - 177
06/01/2007 Authors: Crosson B; McGregor K; Gopinath KS; Conway TW; Benjamin M; Chang Y-L; Moore AB; Raymer AM; Briggs RW; Sherod MG
Neural substrates of syntactic mapping treatment: an fMRI study of two cases.
J Int Neuropsychol Soc Volume: 12 Page(s): 132 - 146
01/01/2006 Authors: Wierenga CE; Maher LM; Moore AB; White KD; McGregor K; Soltysik DA; Peck KK; Gopinath KS; Singletary F; Gonzalez-Rothi LJ

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Profile

Keith McGregor PhD

Academic Appointment

Education

Degrees

Research

Focus

Publications