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ABOUT HOLLIS

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Hello

My name is Hollis Brennan

I specialize in head injuries (concussions, strokes, neurotrauma), chronic illness, self identity, and psychological trauma related diagnoses. My background is in physical health, biomedical sciences, performance psychology, counseling survivors of trauma and brain injury, and neuropsychological/neurodevelopmental evaluations. My work promotes evidenced based practices that extend from the evolutionary, biological, environmental, and social aspects that make us the complex organisms we are, as human beings. 

By supporting the health of our body and our brain we can access the full abilities and power of our mind.

You are unlimited.

Image of Hollis, a white woman with green eyes and a cleft lip, smiling at the camera
unlimited mind black tranparent logo of flower petals arranged in the shape of a brain

Qualifications

  • Years in Practice: 4 Years

  • Therapist at Unlimited Mind

    • Contracting with Creative Directions Counseling & Consulting and Next Breath Psychology

  • Psychometrist at the Pediatric Psychology Services of Colorado

  • Researcher for the TBI Lab at the University of Denver

  • License: Colorado / LPCC.0020055

  • Supervisor: Kyra Logsdon, Dr. Nichole Hardy Swann, Dr. Jake Hanks

  • Trained in EMDR therapy

    • Specialize in EMDR for Survivors of Brain Injury ​

Additional Credentials

  • Degree: Master's of Arts in Sport & Performance Psychology

  • Year graduated: 2019

  • Degree: Professional Science Masters in Biomedical Sciences

  • Year graduated: 2022

Curriculum Vitae 

Clinical Experience​

  • Therapist & Founder, Unlimited Mind LLC ​​

    • October 2022- Present​

    • Contracted with Creative Directions Counseling & Consulting and Next Breath Psychology

  • Psychometrist​at the Pediatric Psychology Services of Colorado

    • January 2023- Present​

  • Interning Therapist, The Brain Injury Alliance of Colorado

    • January 2021 - June 2024

  • Mental Performance Consultant, Center for Performance Excellence

    • September 2018 — June 2019.

 

Research

Publications:

  • Haarbauer-Krupa, J., Daugherty, J., Black, L., Nagele, D., Dettmer, J., Gorgens, K., Brennan, H., Myles, R. L., Ashley, C. L., Medina, A., Tomita, I., & Lambert, L. A. (in submission). The association between childhood traumatic brain injury history and incarceration risk factors.

  • Alexander, A. A., Klukoff, H., Lyman, H., & Neal, B. (under review). Perceptions of police,
    color-blind racial attitudes, and belief in a just world in psychology and law graduate
    trainees.

  • Tackett, M. J., Gorgens, K., Miller, M. A., & Lyman, K. H. (2022). Understanding the rehabilitation psychology specialty career pathway. Rehabilitation psychology, 67(1), 1-8. https://d0i.0rg/l 0.1037/rep0000424

  • Gorgens, K. A., Meyer, L., Dettmer, J., Standeven, M., Goodwin, E., Marchi, C., & Lyman, H. (2021). Traumatic Brain Injury in Community Corrections: Prevalence and Differences in Compliance and Long-Term Outcomes Among Men and Women on Probation. Criminal Justice and Behavior. https://doi.0rg/lO.l 177/00938548211010316

Writing:

  • Lyman, Katherine. (2020) Hidden Burdens of Concussions and Science Communication featured on Science Talk [Blog post]. Retrieved from https://www.sciencetalk.org/a-science- blog/the-hidden-burdens-of-concussions-and-science-communication

Presentations:

  • Haarbauer-Krupa, J., Daugherty, J., Nagele, D. A., Dettmer, J. L., Gorgens, K. A., Brennan, H.,
    Ashley, C. L., Medina, A., Tomita, I., & Lambert, L. A. (2024, October 31–November 3). History of
    childhood traumatic brain injury and potential risk factors for future incarceration [Conference
    presentation]. American Congress of Rehabilitation Medicine Conference, Dallas, TX.

  • Lyman, H. (2022) Understanding and reconstructing sense of self after brain injury. Presented twice at Breaking Barriers: Brain Injury Conference by Brain Injury Alliance of Colorado.

  • Golub, N., Lyman, H., Gorgens, K., Davidson, B., Mapoles, S., Osherow, E., & Pierro, H. (2022). Preseason performance differences between youth with and without a concussion history on a computerized neuropsychological assessment measure. 2022 Association of Applied Sport Psychology Conference, AASP 2022.

  • Mapoles, S., Lyman, H., Le, K., Osherow, E., Matson, J., Golub, N., & Gorgens, K. (2021). Mechanisms of injury differ for justice-involved persons reporting a history of brain injury. Poster presentation at Front Range Neuroscience Group, Fort Collins, Colorado.

  • Lyman, K. H., Kantor, C., Martin, D., Pontius, M., Kane, B., Tatum, K., & Gorgens, K. (2022) Women with Brain Injury in Criminal Justice: Differences in Comorbidities. Poster presentation at the American Psycho logy-Law Society Conference, Denver, CO.

  • Golub, N., Lyman, K. H., Mapoles, S., Le, K., Osherow, E., & Gorgens, K. (2022) Comorbidities of violence exposure and brain injury in a juvenile justice involved population. Poster presentation at the American Psychology-Law Society Conference, Denver, CO.

  • Lyman, K. H., & Valdez, L. (2022) Understanding and reconstructing sense of self after brain injury. Oral presentation at the Division 22 Rehabilitation Psychology Conference, Louisville, KY.

  • Osherow, E., Mapoles, S., Lyman, H., Le, K.,.Golub, N., Gorgens, K. “Mechanisms of Significant Traumatic Brain Injury.” Rehabilitation Psychology Conference (Division 22 of the American Psychological Association). August 4-6, 2022. Minneapolis, MN.

  • Gorgens, K., Lyman, K. H., & Kantor, K. (2022) Women with Brain Injury in Criminal Justice: Differences in Comorbidities. Poster presentation at the Division 22 Rehabilitation Psychology Conference, Louisville, KY. -Runner-up prize for best poster from the Women’s Section

  • Golub, N., Lyman, H., & Gorgens, K. (2021) Psychosocial Comorbidities of Sport-Related TBI: Assessing History in Juvenile Justice. Poster presentation at the Association for Applied Sport Psychology 36th Annual Conference, Virtual.

  • Lyman, K. H. (2021) How Much is a Life Worth? Medical Rationing, Persons who are Trans'^, and Persons with Disabilities. Virtual live presentation at HerDU, Denver, CO.

  • Rivera, K. M., Lyman, H., Hoffman, M., Scott, S., Rozek, C. S., & Doom, J. R.

  • (2021)  Qualitative analysis of adolescent social life during the COVID-19 pandemic. Poster presented at the biennial meeting for the Society for Research in Child Development, Virtual.

  • Wyatt, O., Novak, M., Lyman, H., Stem, D., & Gorgens, K. (2019, October). Revisiting the prevalence of sport-related traumatic brain injuries in the criminal justice system. Poster presented at the Association for Applied Sport Psychology 34th Annual Conference, Portland, OR.

  • Standeven, M., Lyman, K. H., Goodman, E., Murphy, A., Gorgens, K., Dettmer, J., Meyer, L., Knauer, R., & Horsfall, J. (2019, May) Reducing Recidivism for Justice-Involved Individuals with Traumatic Brain Injury: Determining the Efficacy of a Screening, Identification, and Referral Model. Poster presented at University of Denver Research Showcase, Denver, CO.

  • Lyman, K. H. (2019) Trauma in Sport. Presentation at the Association for Applied Sport Psychology, Southwest Regional Conference, Denver, CO.

  • Wyatt, O., Lyman, K. H., White, J. M., Granholm, A. C., Davidson, B., Ledreux, A., Shelburne, K., Pryhoda, M., Gihnore, A., Oduleye, N., Mackenzie, M., King, H., Regan, C. & Webb, T. (2018, December). A model study of multifactor concussion assessment. Poster presented at the 16th annual meeting of the Front Range Neuroscience Group, Fort Collins, CO.

  • Webb, T., Granholm, A. C., Gorgens, K., Ledreux, A., Shelburne, K., Pryhoda, M., Gilmore, A., Wyatt, O. R., Oduleye, N., Mackenzie, M., King, H., Lyman, K. H, White, J. M.,Regan, C., & Davidson, B. (2018, December). Clinical Balance Testing for the Sensitivity of Concussion History in Division One Athletes. Poster presented at the 16th annual meeting of the Front Range Neuroscience Group, Fort Collins, CO.

  • Regan, C., Granholm, A. C., Gorgens, K., Ledreux, A., Shelburne, K., Pryhoda, M., Gilmore, A.,Wyatt, O. R., Oduleye, N., Mackenzie, M., King, H., Lyman, K, H., White, J. M., Webb, T., & Davidson, B. (2018, December). Biomedical balance measurement and vestibular- ocular system sensitivity to acute concussion. Poster presented at the 16th annual meeting of the Front Range Neuroscience Group, Fort Collins, CO.

  • Gilmore, A., Davidson, B., Gorgens, K., Ledreux, A., Shelburne, K., Pryhoda, M., Wyatt, O. R., Oduleye, N., Mackenzie, M., King, H., Lyman, K. H., White, J. M., Regan, C., Webb, T., & Granholm, A. C. (2018, December). Plasma and neuron-derived exosome biomarker levels in athletes with acute mTBI and chronic mTBT Poster presented at the 16th annual meeting of the Front Range Neuroscience Group, Fort Collins, CO.

  • Lyman, K. H., & Bracy, A. (2018) Women in Ultra Running. Presentation at the Association for Applied Sport Psychology, Southwest Regional Conference, Denver, CO.

  • Bishop, B., Lyman, K. H., Pasquarello, N., & Wang, T. (2011) Effects of Power and Status on Punishment Severity. Poster presented at the 24th Convention for Association for Psychological Science, Chicago, IL.

Invited Guest Lectures

  • Brennan, K.H. (2024, March 5th) What you can do with a master’s degree. Invited lecture atUniversity of Denver, Denver, CO.

SERVICE

Journal Reviewer:

  • American Psychologist; Journal of Offender Rehabilitation; Journal of Offender Rehabilitation; PLOS One; Professional Psychology: Research and Practice; Substance Use and Misuse; The Surgery Journal

 

University Service:

  • Alumni field placement supervisor: Master’s in Sport and Performance Psychology program at the University of Denver’s Graduate School of Professional Psychology (September 2021-June 2022)

 

Professional Service:

  • APA Division 47 Cornerstone Committee (2019 – 2022)

  • Early Career Mentorship Program Chair (2022-2024)

  • APA Division 47, Sport Psych Works voluntary contributor & editor (2019 – 2020)

  • Janet Hyde Graduate Student Research Grant Reviewer (2023- current)

Community Service:

  • Founding Committee member of Blocks, Neighborhoods, and Communities (August 2021 – December 2022)

  • Colorado Palliative & Hospice Care, Legacy Stories interviewer & writer (2020 – 2023)

  • Colorado Poor People's Campaign, Coordinating Committee (May 2020 – August 2021)

  • The Blue Bench, Hotline Advocate for sexual assault survivors (November 2018 – April 2021)

  • Diversity, Equity, Consent, and Inclusion (DICE) Team, Burning Man Affiliated Events (2022)

TRAINING AND CONTINUING EDUCATION

  • Grant Writing Certificate (November 15, 2020)

  • Increasing Awareness and Insight, TBI (March 29, 2022)

  • Basic EMDR Training (March 3,2023)

  • EMDR and Traumatic Brain Injuries (April 22, 2023)

  • Autistic-Affirmative Therapy for Allistic Providers (June 14, 2023)

Professional Affiliations:

  • American Association for the Advancement of Science

  • APA Division 7 Developmental Psychology

  • APA Division 15 Educational Psychology

  • APA Division 22 Rehabilitation Psychology

  • APA Division 33 Intellectual and Developmental Disabilities/Autism Spectrum Disorder

  • APA Division 35 Society for Environmental, Population and Conservation Psychology

  • APA Division 35 Society for the Psychology of Women

  • APA Division 40 Society for Clinical Neuropsychology

  • APA Division 44 Society for the Psychology of Sexual Orientation and Gender Diversity

  • APA Division 48 Society for the Study of Peace, Conflict and Violence

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