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Biomedical subjects

B D Murdoch

Publications and source records attributed to B D Murdoch.

11 recordsLinked to original sources
PubMed1993

The EEG in the determination of fitness to fly.

Previous studies have shown a low incidence of clinical seizure development in healthy individuals with EEG epileptiform discharge activity. This has tended to de-emphasise the role of the EEG in screening pilots. A call is made for consideration of impairment of function associated with epileptiform discharges as a relevant factor in determination of fitness to fly and reconsideration of the role of the EEG in this area.

Accidents, Aviation↗
PubMed1991

The EEG in pilot selection.

We summarised and tabulated the literature dealing with the electroencephalogram in pilot selection published since a review in 1976. The incidence of seizure development in healthy groups with epileptiform discharges in their EEGs was found to be very low. An alternative interpretation is offered of the significance of epileptiform discharges in these groups in the context of pilot selection, and a plea is made for international standardization of procedures in this area.

Aerospace Medicine↗
PubMed1986

Lateral dominance and visual evoked potentials in albinos.

Lateral preferences for the use of eye, hand, and foot were assessed in 17 male and female albino subjects, aged 15 to 52 yr. Visual evoked potential (VEP) recordings suggested that optic fibres were abnormally decussated in these subjects, as others have shown. Fewer albino subjects showed the lateral preference for the use of hand/eye and foot/eye similar to that of normals. It is postulated that the abnormal decussation of optic fibres may underlie the reduced preference for the use of the same hand and eye, and foot and eye, in albinos.

Adolescent↗
PubMed1985

Pattern-reversal visual evoked potential in a case of nitrous oxide abuse and recovery.

Pattern reversal visual evoked potentials were recorded in a dentist who had abused nitrous oxide while he showed neurologic impairment and during recovery. The latency of the major positive peak (P100) remained constant during both phases. However, the amplitude of this peak was markedly reduced during the stage of neurologic involvement, and increased during recovery after withdrawal. The clinical significance of this is discussed.

Adult↗
PubMed1982

The electro-encephalogram in clinical practice.

The clinical ambit of the electro-encephalogram (EEG) is discussed for the benefit of practitioners who do not regularly use this procedure. Some topics covered are: what is measured by an EEG; the report; epileptiform and nonspecific signs in relation to a diagnosis of epilepsy; and limitations and advantages of the EEG.

Electroencephalography↗
PubMed1980

Loss of consciousness in healthy South African men: Incidence, causes and relationship to EEG abnormality.

The incidence of loss of consciousness (LOC) in 389 healthy young South African men was determined and surveyed in relation to ten precipitating stimuli. In 66% of the men the findings were related to electro-encephalographic abnormality. A relatively high group incidence of LOC was found, most frequently associated with head trauma. No relationship between LOC and electro-encephalographic abnormality emerged. The significance of the findings for aviation medical examiners is discussed.

Adolescent↗