Heart rate variability (HRV) and muscular system activity (EMG) in cases of crash threat during simulated driving of a passenger car

Objectives: The aim of the study was to verify whether simultaneous responses from the muscular and circulatory system occur in the driver's body under simulated conditions of a crash threat. Materials and Methods: The study was carried out in a passenger car driving simulator. The crash was included in the driving test scenario developed in an urban setting. In the group of 22 young male subjects, two physiological signals - ECG and EMG were continuously recorded. The length of the RR interval in the ECG signal was assessed. A HRV analysis was performed in the time and frequency domains for 1-minute record segments at rest (seated position), during undisturbed driving as well as during and several minutes after the crash. For the left and right side muscles: m. trapezius (TR) and m. flexor digitorum superficialis (FDS), the EMG signal amplitude was determined. The percentage of maximal voluntary contraction (MVC) was compared during driving and during the crash. Results: As for the ECG signal, it was found that in most of the drivers changes occurred in the parameter values reflecting HRV in the time domain. Significant changes were noted in the mean length of RR intervals (mRR). As for the EMG signal, the changes in the amplitude concerned the signal recorded from the FDS muscle. The changes in ECG and EMG were simultaneous in half of the cases. Conclusion: Such parameters as mRR (ECG signal) and FDS-L amplitude (EMG signal) were the responses to accident risk. Under simulated conditions, responses from the circulatory and musculoskeletal systems are not always simultaneous. The results indicate that a more complete driver's response to a crash in road traffic is obtained based on parallel recording of two physiological signals (ECG and EMG)

The molecular logic of endocannabinoid signalling

The endocannabinoids are a family of lipid messengers that engage the cell surface receptors that are targeted by Δ9-tetrahydrocannabinol, the active principle in marijuana (Cannabis). They are made on demand through cleavage of membrane precursors and are involved in various short-range signalling processes. In the brain, they combine with CB1 cannabinoid receptors on axon terminals to regulate ion channel activity and neurotransmitter release. Their ability to modulate synaptic efficacy has a wide range of functional consequences and provides unique therapeutic possibilities. © 2003, Nature Publishing Group. All rights reserved

Racist Racism: Complicating Whiteness Through the Privilege & Discrimination of Westerners in Japan

With no anti-discrimination legislation, strong Confucian-inspired ingroup mentality, and a belief in their mono-ethnicity, Japan is marred by a culture of widespread discrimination. Although it has ratified the International Convention for the Elimination of All Forms of Racial Discrimination, and guarantees equality in its Constitution, all those who differ from the closely circumscribed norm are excluded culturally, and legally. Whites’ position in this milieu is complicated because of the West’s unique historical relationship with Japan, and due to the perception of white global dominance. Although admired and arguably privileged over other outsiders, Caucasians are nevertheless mocked and discriminated against—openly, frequently, and with impunity. The concept of racism, as funneled through critical race theory’s (“CRT”) reliance on homogeneous white privilege, lacks dialectic space to address their experiences of discrimination. Yet both CRT analytical tools and desire for praxis, and Confucian respect for human dignity have much to offer in expanding discrimination discourse, exposing the concept of racism as Western-centric, supporting equality, and giving voice to victims who do not fit the victim norm. In the process, this enlarged theoretical and analytical space can help alleviate Japan’s labor shortage, prompting multi-faceted reforms, and achieving true Confucian harmony and democracy. I propose to create new discourse, situated within expanded CRT and whiteness studies, while providing analytical coverage to a group of Caucasians rarely mentioned in popular or scholarly literature. Definitions of “the other” and “white privilege” need to move away from monolithic notions of race and power, which are white-centric and racist themselves