1976; Sasaki and Gemba 1981, 1982; Jinnai et al. 1987). These two layer-specific differentiations of thalamocortical inputs may contribute to generate an alternative waveform of MEFs, such that once the motor cortex neurons are driven by some strong afferent volley originated in the periphery as expected in

MEFI, the thalamocortical network entrains Inhibitors,research,lifescience,medical grouped behavior of these two regions to resonate for a short while. Acknowledgments We thank Y. Takeshima for technical assistance. This work was supported by grants from the Center for Multidisciplinary Brain Research, the National Institutes for Physiological Sciences (NIPS), and Kinjo Gakuin University Research Grant B. Conflict of Interest None declared.
Posttraumatic Inhibitors,research,lifescience,medical stress disorder (PTSD) is characterized by a broad range of symptoms and behaviors stemming from exposure to a traumatic event that is a perceived threat to oneself or

others. The PTSD symptoms described in the Diagnostic and Statistical Manual of Mental Disorders (Fourth Edition) (DSM-IV) (American Psychiatric Association 1994) are divided Inhibitors,research,lifescience,medical into three clusters: reexperiencing, avoidance/numbing, and hyperarousal. The validity of the current conceptualization of PTSD described in DSM-IV has been questioned because of the often heterogeneous presentation of PTSD; the overlap in symptom criteria between PTSD, other anxiety disorders, and major depressive disorder; and the high comorbidity rate among these disorders (North et al. 2009). A number of Akt inhibitor factor analyses have been conducted, most suggesting alternative two-, three-, or four-factor models of PTSD Inhibitors,research,lifescience,medical that provide different conceptualizations

of PTSD: including additional symptom clusters such as dysphoria, or distinguishing between an active avoidance and passive numbing factor (Foa et al. 1995; Buckley Inhibitors,research,lifescience,medical et al. 1998; King et al. 1998; Asmundson et al. 2000; Amdur and Liberzon 2001; Gaffney 2003; Baschnagel et al. 2005; Elhai et al. 2009). Posttraumatic stress disorder factor analyses traditionally have focused only on identifying symptoms that cluster in a given population, while significantly less attention has been paid to exploring how these factors respond to treatment. Antidepressant pharmacotherapy has been shown to be clinically efficacious for treating PTSD (Davidson 2006). and However, inconsistencies in patterns of treatment response, including variations in response rates (Stein et al. 2009), have been observed in PTSD patients treated with these agents. By assessing the relationship between PTSD symptom clusters and response to pharmacotherapy, we may further our ability to predict response to treatment and possibly contribute to our understanding of the way in which these treatments ameliorate PTSD symptomatology.