Philip A. Allen, Ph.D.

Philip A. Allen, Ph.D.

Title: Professor
Dept/Program: Adult Development and Aging Psychology
Office: CAS 364
Phone: 330-972-6177
Curriculum Vitae: Download in PDF format


Dr. Allen received his Ph.D. in Life-span Developmental/Experimental Psychology from Ohio State University in 1987. He completed a 2-year postdoctoral research fellowship at the Center for Aging and Human development, Duke Medical Center. Research interests include cognition, cognitive aging, and Chiari malformation Type I using behavioral, EEG, and MRI methods. His publications have appeared in Psychology and Aging, Journal of Gerontology: Psychological Sciences, Experimental Aging Research, Psychonomic Bulletin and Review, Psychological Research, Journal of the International Neuropsychological Society (JINS), Neuropsychology, Neuropsychologia, Cortex, Psychological Medicine, and Annals of Biomedical Engineering.


Co-PI, High Resolution Diffusion Tensor Imaging of the Cerebellum and Brainstem in Type I Chiari Malformation: Associations with Cognitive Function and Symptomatology, Conquer Chiari Foundation Grant

  • Proposes to find morphometric measures (now 3-d instead of 2-d) that will predict symptom severity after neurosurgery (and it includes an event-related fMRI task to conclusively link brain ROIs to symptom severity.  Also, it is a longitudinal study (protocols at baseline before surgery and again 4-6 months after surgery).

I also in finishing up a high-resolution DTI study (diffusion tensor imaging study with Jim Houston) to examine how brainstem and cerebellum ROIs in Chiari patients versus controls are related to cognitive and affective measures.  Finally, we are working on a new project on structural MRIs in Chiari malformation and headaches—and a sub-set of these folks will have full physical therapy assessments.


Mohsenian, S., Ibrahimy, A., Alsamman, M.M., Oshinski, J.N., Bhadelia, R.A., Barrow, D.L., Allen, P.A., Amini, R. & Loth, F. (in press). Association between resistance to cerebrospinal fluid flow and cardiac-induced brain tissue motion for Chiari malformation type 1. Neuroradiology. Advance online publication.

Kutash, L.A., Sayer, M.A., Samii, M.R., Rabinowitz, E.P., Boros, A., Jensen, T., Allen, P.A., Garcia, M., & Delahanty, D.L. (in press). Questionable utility of the Montreal Cognitive Assessment (MoCA) in detecting cognitive impairment in individuals with comorbid PTSD and SUD. Applied Neuropsychology: Adult.  

Tokar, D.M., Kaut, K.P., & Allen, P.A. (in press). Revisiting the factor structure of the Short-Form McGill Pain Questionnaire-2 (SF-MPQ-2): Evidence for a bifactor model in individuals with Chiari malformation. PLoS ONE.

Al Samman, M.M.F., Ibrahimy, A, Nwotchouang, B.S.T., Oshinski, J.N., Barrow, D.L., Allen, P.A., Amini, R., Bhadelia, R.A., & Loth, F.  (in press). The relationship between imbalance symptom and cardiac pulsation-induced mechanical strain in the brainstem and cerebellum for Chiari malformation Type I. Journal of Biomechanical Engineering.

Labuda, R., Loth, D., Loth, F., Allen, P.A. (2023). Pain and Depression Account for More Than Half of the Neck Disability Variance Among Adult Females with Chiari I. World Neurosurgery, 171, e478-e485.  

Morkos, M., Eppelheimer, M., Nwotchouang, B.S.T., Ebrahimzadeh, S.A., Bhadelia, R.A., Loth, D., Allen, P.A., Loth, F. (2022). The importance of precise plane selection for female adult Chiari Type I malformation midsagittal morphometrics. PLoS ONE, 17(8), e0272725.    

Labuda, R., Loth, D., Allen, P.A., Loth, F. (2022). Factors Associated with Patient Reported Post-surgical Symptom Improvement in Adult Females with Chiari Malformation Type I: A Report from the Chiari1000 Dataset. World Neurosurgery, 161, e682-e687.  

Labuda, R., Nwotchouang, B.S.T, Ibrahimy, A., Allen, P.A., Oshinski, J.N., Klinge, P., Loth, F. (2022). A New Hypothesis for the Pathophysiology of Symptomatic Adult Chiari Malformation Type I. Medical Hypotheses.  

Thakar, S., Kanneganti, V., Nwotchouang, B.S.T., Eppelheimer, M., Loth, F., Allen, P.A., Aryan, S., Alangar, S.H. (2022). Are Two-Dimensional Morphometric Measures Reflective of Disease Severity in Adult Chiari I Malformation? World Neurosurgery, 57, e497-e505.  

Garcia, M., Eppelheimer, M.S., Houston, J.R., Hughes, M.L., Nwotchouang, B.S.T., Kaut, K.P., Labuda, R., Bapuraj, J.R., Maleki, J., Klinge, P.M., Vorster, S., Luciano, M.G., Loth, F., & Allen, P.A. (2022).  Adult age differences in self-reported pain and anterior CSF space in Chiari malformation.  The Cerebellum, 21, 194–207.  

Nwotchouang, B.S.T., Ibrahimy, A., Loth, D.M., Labuda, E., Labuda, N., Eppelheimer, M., Labuda, R., Bapuraj, J.R., Allen, P.A., Klinge, P.M., & Loth, F.  (2021). Imaging and health metrics in Incidental Cerebellar Tonsillar Ectopia: Findings from the Adolescent Brain Cognitive Development Study (ABCD).  Neuroradiology, 63, 1913-1924.  

Eppelheimer, M.S.; Nwotchouang, B.S.T., Pahlavian, S.H., Barrow, Daniel, Amini, R., Allen, P.A., Loth, F., & Oshinski, J. (2021). Cerebellar and Brainstem Displacement Measured with DENSE MRI in Chiari Malformation Following Posterior Fossa Decompression Surgery. Radiology, 301(1), 187-194.  

Houston, M.L., Houston, J.R., Sakaie, J., Klinge, P.M., Vorster, S., Luciano, M.G., Loth, F., & Allen, P.A. (2021). Functional connectivity abnormalities in Type I Chiari: Associations with cognition and pain.  Brain Communications, 3(3), fcab137.  

Garcia, M.A., Li, X., Allen, P.A., Delahanty, D.L., Eppelheimer, M.S., Houston, J.R., Johnson, D.M., Loth, F., Maleki, J., Vorster, S., & Luciano, M.G. (2021). Impact of Surgical Status, Loneliness, and Disability on Interleukin 6, C-Reactive Protein, Cortisol, and Estrogen in Females with Symptomatic Type I Chiari Malformation. The Cerebellum, 20, 872–886.  

Nwotchouang, B., Eppelheimer, M.S., Pahlavian, S.H., Barrow, J.W., Qiu, D., Allen, P.A., Oshinski, J.N., Amini, R., & Loth, F. (2021). Regional brain tissue displacement and strain is elevated in subjects with Chiari Malformation Type I compared to healthy controls: A study using DENSE MRI.  Annals of Biomedical Engineering, 49, 1462-1476.   

Ibrahimy, A., Huang, C.-W.C, Bezuidenhout, A.F., Allen, P.A., Bhadelia, R.A., & Loth, F. (2021).  Association between resistance to cerebrospinal fluid flow near the foramen magnum and cough-associated headache in adult Chiari malformation type I. Journal of Biomechanical Engineering, 143(5), 051003-1.  

Lien, M.-C., Allen, P.A., & Ruthruff, E. (2021). Case mixing impedes early lexical access: Converging evidence from the masked priming paradigm.  Psychological Research, 85, 1317-1337.  

Mallik, P.R., Allen, P.A., Lien, M-C., Jardin, E., Houston, M.L., Houston, J.R., Jurosic, B.K. (2021). An electrophysiological study of aging and perceptual letter-matching. Experimental Aging Research, 47, 92-108. 

Lien, M.-C., Allen, P.A., Ruthruff, E. (2021). Multiple routes to word recognition: Evidence from event-related potentials. Psychological Research, 80, 151-180.

Houston, J.R., Hughes, M.L., Bennett, I.J., Allen, P.A., Rogers, J.M., Lien, M.-C., Stoltz, H., Sakaie, K., Loth, F., Maleki, J., Vorster, S.J., Luciano, M.G. (2020). Evidence of neural microstructure abnormalities in Type I Chiari Malformation: Associations among fiber tract integrity, pain, and cognitive dysfunction. Pain Medicine, 21(10), 2323-2335.