Gender differences in psychosocial factors related to severe stress in a construction company in Japan.

Background: In Japan, women's participation in the workforce has been increasing. However, there are few studies about gender differences in stress factors in the workplace.

Objectives: We aimed to clarify gender differences in psychosocial factors in the workplace related to severe stress.

Pre-stimulus alpha oscillation and post-stimulus cortical activity differ in localization between consciously perceived and missed near-threshold somatosensory stimuli.

Conscious perception of a near-threshold (NT) stimulus is characterized by the pre- and post-stimulus brain state. However, the power of pre-stimulus neural oscillations and strength of post-stimulus cortical activity that lead to conscious perception have rarely been examined in individual cortical areas. This is because most previous electro- and magnetoencephalography (EEG and MEG, respectively) studies involved scalp- and sensor-level analyses.

Modulation of brachioradialis motoneuron excitabilities by group I fibers of the median nerve in humans.

Group I fibers from muscle spindles and Golgi tendon organs modulate motoneuron excitabilities to coordinate smooth movements. In this study, to elucidate the effects of group I fibers of the median nerve (MN) on the excitabilities of the brachioradialis (BR), we evaluated the changes in the firing probability of a BR motor unit after electrical conditioning stimulation (CS) to MN with a post-stimulus time-histogram technique in six healthy human subjects. We tested 171 motor units: in 72 of them CS to MN at the elbow with the intensity just below the threshold of alpha motor fibers (MT) produced a facilitatory effect (facilitation), while in 43 of them it produced inhibitory one (inhibition).