Glomus jugulare tumours with special reference to their radiological features.
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Biomedical subjects
Publications and source records attributed to T D Hawkins.
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Schedules of intermittent brain-stimulation reinforcement have been shown to maintain performances when a reinforcement is defined as several response-produced, brief trains of stimulation. The present experiments show that the number of response-produced trains permitted per reinforcement is a variable analogous to amount or magnitude of reinforcement in the conventional food-reinforcement experiment. Systematic effects were obtained when that variable was manipulated within a multiple schedule and also on variable-interval schedules programmed concurrently.
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A series of cranial images obtained at three magnetic field strengths in a volunteer on a fast ramp magnetic resonance system is presented. This study was undertaken in the space of 5 h.