On reversible deafness, generalized anxiety disorder, and the motoric brain: a psychophysiological perspective.

Electromyographic (EMG) recording during presentation of loud sounds revealed central motor inhibition in a rare case of conversion disorder with deafness. Two subjects in whom hypnotic deafness was induced resembled the patient. In contrast, patients with generalized anxiety disorder (GAD) showed a significantly delayed return of EMG to baseline, compared with normals and schizophrenics following administration of auditory startle stimuli.

On electromyographic (EMG) gradients and movement-related brain activity: significance for motor control, cognitive functions, and certain psychopathologies.

Electromyographic (EMG) voltage that rises continuously during motor performance or mental activity and falls precipitately at the end is known as an EMG gradient. Our review is based on 55 studies of EMG gradients, which were published during the period 1937-1994. The extremely wide diversity of situations yielding EMG gradients suggests the possibility that these gradients may be universal accompaniments of organized goal-directed behavioral sequences, overt and covert.

Effects of intracerebroventricular angiotensin II and olfactory stimuli on multiple unit activity in preoptic and anterior hypothalamic areas: medial-lateral comparison.

Under urethane anesthesia multiple unit activity (MUA) recordings were taken from medial and lateral preoptic and anterior hypothalamic sites in 21 rats during multiple dose intracerebroventricular (i.vt.) injections of angiotensin II (AII), using artificial CSF as control.

Individual consistency and modifiability of lapping rates in rats: a new look at the variance--invariance question.

Lapping rates were recorded from water-deprived rats over 3-week periods when they were young adults and again, 9.4 months later, when they were middle-aged. Test-retest correlation coefficients of 0.

Cardiovascular and respiratory responses to electrical stimulation of the midbrain in the rat.

In descending through the midbrains of rats with stimulation electrodes, we have observed some remarkable reversals of pressor and depressor autonomic effects as the electrode was moved from one locus to another. Autonomic effects of stimulating in the midbrain areas that we studied are of special interest because stimulations in some of these midbrain loci have pain-relieving effects (Hosobuchi et al., 1977, 1979; Mayer et al.