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Rationale The startle reflex to a sudden intense acoustic pulse stimulus is attenuated if the pulse is shortly preceded by a weak prepulse stimulus. This represents a form of sensory gating, known as prepulse inhibition (PPI), observable across species. PPI is modulated by dopamine and readily disrupted by acute amphetamine. Prior repeated exposures to amphetamine also disrupt PPI even when the drug...
Parkinson's disease (PD) is marked by characterised motor deficits and is accompanied by a severe degeneration of the nigrostriatal dopamine (DA) pathway. It has also been reported that PD patients exhibited additional behavioural deficits, including a deficiency in sensorimotor gating mechanisms. We therefore examined whether the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) model of PD in...
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