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Biomedical subjects

G B Proulx

Publications and source records attributed to G B Proulx.

5 recordsLinked to original sources
PubMed1992

Behavioural disturbances in the demented elderly: phenomenology, pharmacotherapy and behavioural management.

Behavioural disturbances in the demented elderly cause a significant amount of distress both to the patients and their caregivers. This article first summarizes the phenomenology associated with these disturbances. It then deals with the pharmacological methods of reducing these disturbances. Finally, it deals with some of the more recent advances in combining the insights of behavioural modification with those of neuropsychology in finding non pharmacological methods of reducing problematic behaviours. It is stressed that a combination of the two approaches is most likely to be required, and most likely to be successful, in the individual case.

Aged↗
PubMed1978

Human auditory sustained potentials. I. The nature of the response.

In response to a sustained toneburst a negative baseline shift can be recorded from the human fronto-central scalp regions with an onset latency of approximately 150 msec. This auditory sustained potential is distinct both in its scalp distribution and in its stimulus relationships from the transient response occurring at the onset or offset of the toneburst. It differs from the contingent negative variation in that it can occur in the absence of attention or during sleep. Attention to the auditory stimulus can increase the amplitude of the sustained potential, possibly through the addition of an extra negative potential related to auditory expectancy or uncertainty.

Adolescent↗
PubMed1978

Human auditory sustained potentials. II. Stimulus relationships.

The auditory sustained potential recorded from the human scalp increases in amplitude with increasing stimulus intensity. At rapid rates of stimulus presentation its amplitude decreases but proportionately less so than the amplitude of the transient onset auditory evoked potential. The frequency specificity of this rate effect is complex, suggesting that there may be two underlying components of the scalp-recorded auditory sustained potential. The amplitude of the auditory sustained potential is smaller when the tonal frequency of the stimulus is higher. With prolonged stimulus durations there is some adaptation of the amplitude of the auditory sustained potential. This potential is larger in amplitude when sounds are presented binaurally than monaurally, and has a symmetrical coronal scalp distribution that is unaffected by the ear of stimulation.

Acoustic Stimulation↗