Cole, K.E., Lee, J., Davis, M., Parsons, R.G. (2019). Subthreshold fear conditioning produces a rapidly developing neural mechanism that primes subsequent learning. eNeuro, doi: 10.1523/ENEURO.0113-19.2019 <link to article>

Voulo, M.E., and Parsons, R.G. (2019). Gonadal hormone fluctuations do not affect the expression or extinction of fear potentiated startle in female rats. Behavioral Neuroscience, doi:10.1037/bne0000324 <link to article>

Russo, A. S., Lee, J., & Parsons, R. G. (2019). Individual variability in the recall of fear extinction is associated with phosphorylation of mitogen-activated protein kinase in the infralimbic cortex. Psychopharmacology (Berl). doi:10.1007/s00213-019-05195-2. <link to article>


Lee, J., Russo, A.R., & Parsons, R.G. Facilitation of fear learning by prior and subsequent fear conditioning.  Behavioural Brain Research, 347, 61-68 <link to article>

Parsons, R.G. Behavioral and neural mechanisms by which prior experience impacts subsequent learning. Neurobiology of Learning and Memory, 154, 22-29  <link to article>


Voulo, M.E., & Parsons, R.G. Response-specific sex difference in the retention of fear extinction.  Learning and Memory, 24, 245 –251 <link to article>

Russo, A.R., & Parsons, R.G.  Acoustic startle response in rats predicts inter-individual variation in fear extinction. Neurobiology of Learning and Memory, 139, 157-164 <link to article>

Barfield, E.T., Gerber, K.J., Zimmermann, K.S., Ressler, K.J., Parsons, R.G., Gourley, S.L. Regulation of actions and habits by ventral hippocampal trkB and adolescent corticosteroid exposure, PLoS Biololgy 15(11) e2003000. <link to article>

Shapiro, L.P., Parsons, R.G., Koleske, A.J., & Gourley, S.L. Differential expression of cytoskeletal regulatory factors in the adolescent prefrontal cortex: Implications for cortical development. Journal of Neuroscience Research, 95, 1123-1143. <link to article>

Sharp, W.G., Allen A.G., Stubbs, K.H., Criado, K.K., Sanders, R., McCracken, C.E., Parsons, R.G., Scahill, L., Gourley S.L. Successful pharmacotherapy for the treatment of severe feeding aversion with mechanistic insights from cross-species neuronal remodeling. Translational Psychiatry 7: e1157. <link to article>


Parsons, R.G., Walker, D.L., & Davis, M.  Mechanisms underlying long-term fear memory formation from a metaplastic neuronal state. Neurobiology of Learning and Memory <link to article>

2013 and prior

Parsons, R.G., & Ressler, K.J. Implications of memory modulation for post-traumatic stress and disorders of fear. Nature Neuroscience, 16, 146-153. <link to article>

Gafford, G.M., Parsons, R.G, & Helmstetter Memory accuracy predicts hippocampal mTOR pathway activation following retrieval of contextual fear memory.  Hippocampus, 23, 824-847. <link to article>

Parsons, R.G., & Davis, M. A metaplasticity-like mechanism supports the selection of fear memories: Role of Protein Kinase A in the amygdala. Journal of Neuroscience, 32, 7843-7851. <link to article>

Parsons, R.G., & Davis, M. Temporary disruption of fear potentiated startle following PKMζ inhibition in the amygdala.  Nature Neuroscience, 14, 295-296 <link to article>

Parsons, R.G., Gafford, G.M., & Helmstetter, F.J. Regulation of extinction-related plasticity by opioid receptors in the ventrolateral periaqueductal gray matter.  Frontiers in Behavioral Neuroscience, 4 :44. doi:10.3389/fnbeh.2010.00044 <link to article>

Gafford, G.M. Parsons, R.G., & Helmstetter, F.J. Consolidation and reconsolidation of contextual fear memory requires mammalian target of rapamycin-dependent translation in the dorsal hippocampus.  Neuroscience, 182, 98-104 <link to article>

Parsons, R.G., Gafford, G.M., Baruch, D.E, Riedner, B.A., & Helmstetter, F.J. Long term stability of fear memory depends on the synthesis of protein but not mRNA in the amygdala.  European Journal of Neuroscience, 23, 1853-1859. <link to article>

Parsons, R.G., Riedner, B.A., Gafford, G.M. & Helmstetter, F.J. The formation of auditory fear memory requires the synthesis of protein and mRNA in the auditory thalamus. Neuroscience, 141, 1163-1170. <link to article>

Parsons, R.G.*, Gafford. G.M.*, & Helmstetter, F.J. Translational control via the mammalian target of rapamycin (mTOR) pathway is critical for the formation and stability of long term fear memory in amygdala neurons.  Journal of Neuroscience, 26, 12977-12983. *denotes co-first authorship. <link to article>