David L. Tuck

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1. Synchronization of intercostal motoneurones was studied by the construction of cross-correlation histograms which related the firing times of paired groups of efferent inspiratory or expiratory discharges recorded from filaments of the external or internal nerves of anaesthetized or decerebrate cats.2. The principal feature of the histograms was always a(More)
An instrument has been developed to help speed up the clinical assessment of the thyroid-gland condition as indicated by the Achilles-tendon-reflex duration. This is achieved by processing the signal from a commercial photoelectric displacement transducer and immediately providing both an image display and a digital readout of the duration. Incorrect(More)
  • D. L. Tuck
  • Medical and Biological Engineering and Computing
  • 1981
The Doppler ultrasonic technique for the monitoring of the foetus has been available for well over a decade. It offers a noninvasive assessment of the condition of the foetus and has therefore become an important antenatal technique. However, the foetal heart rate information obtained by this technique is considered to be less precise than that obtained(More)
The effects of a range of doses of trimethyltin chloride (1.8-7.0 mg/kg, TMT) on responding maintained under a differential-reinforcement-of-low-rate 15-sec schedule of water presentation were examined in rats. TMT produced a large decrease in the percent of reinforced responses and consequently a decrease in the rate of reinforcement. These effects were(More)
  • D. L. Tuck
  • Medical and Biological Engineering and Computing
  • 1982
An improved method for the determination of foetal heart rate from Doppler ultrasound signals is described and evaluated. It determines the most probable pulse interval from the recurrence times of multiple echoes generated by each cardiac pulse. The method, when optimised, is shown to offer an improvement over current systems, especially in reduced signal(More)
We examined the magnetic resonance properties of 12 paramagnetic piperidinyl nitroxyls in water and plasma solutions. Paramagnetic contributions to proton relaxation times were measured using 10.7 and 100 MHz spectrometers. Proton relaxation enhancement from nitroxyls increased with ascending molecular weight, in plasma solutions versus equimolar aqueous(More)