Helen P Malmo

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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(More)
In 16 rats multiple unit activity was recorded simultaneously from ventral forebrain and dorsal midbrain areas, with continuous monitoring by sensitive head movement and body movement recorders, along with careful observations of ongoing behaviors. Both forebrain and midbrain multiple unit activity were significantly correlated with head and body movements:(More)
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(More)
In 18 acutely prepared rats and in 3 chronically implanted rats, multiple-unit responses of lateral preoptic area (LPOA) neurons to angiotensin II (A II) and hypertonic NaCl and sucrose injected into the lateral ventricle were recorded. In addition, behavioral reactions were observed in the chronically prepared rats. Results showed that i.vt. injections of(More)
We report the results of a series of experiments whose main objectives are: (a) the identification of neural receptors for thirst; and (b) other neural structures of critical importance for thirst and drinking behavior. We have used results from hypertonic challenges during acute unit and multiple-unit recording experiments to identify responsive brain(More)
Multiple-unit recordings were taken from the lateral preoptic region during a series of hypertonic and isotonic NaCl and sucrose intracarotid injections. Subjects were 11 hooded rats (8 males and 3 ovariectomized females) under urethane anesthesia. The data showed that under favorable cannulation conditions there were strong multiple-unit responses to(More)