Sensory and sensorimotor gating deficits after neonatal ventral hippocampal lesions in rats.

Developmental Neuroscience
Neal R SwerdlowSusan B Powell

Abstract

Neonatal ventral hippocampal lesions (NVHLs) in rats lead to reduced prepulse inhibition (PPI) of startle and other behavioral deficits in adulthood that model abnormalities in schizophrenia patients. A neurophysiological deficit in schizophrenia patients and their first-degree relatives is reduced gating of the P50 event-related potential (ERP). N40 ERP gating in rats may be a cross-species analog of P50 gating, and is disrupted in experimental manipulations related to schizophrenia. Here, we tested whether N40 gating as well as PPI is disrupted after NVHLs, using contemporaneous measures of these two conceptually related phenomena. Male rat pups received sham or ibotenic acid NVHLs on postnatal day 7. PPI was tested on days 35 and 56, after which rats were equipped with cortical surface electrodes for ERP measurements. One week later, PPI and N40 gating were measured in a single test, using paired S1-S2 clicks spaced 500 ms apart to elicit N40 gating. Compared to sham-lesioned rats, those with NVHLs exhibited PPI deficits on days 35 and 56. NVHL rats also exhibited reduced N40 gating and reduced PPI, when measured contemporaneously at day 65. Deficits in PPI and N40 gating appeared most pronounced in rats with larger lesions,...Continue Reading

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Citations

Aug 15, 2013·Cell and Tissue Research·Vincenzo MicaleAlexandra Sulcova
Dec 5, 2013·Physiological Reports·Robert E LinSteven J Siegel
Jun 7, 2014·Schizophrenia Bulletin·Gregory LightDavid L Braff
Sep 10, 2014·Respiratory Physiology & Neurobiology·Cecile ChenivessePaul Davenport
Apr 10, 2013·Neuroscience and Biobehavioral Reviews·Enoch NgJohn C Roder
Apr 8, 2015·Behavioural Brain Research·Anna SchroederMaarten van den Buuse
May 17, 2014·The International Journal of Neuropsychopharmacology·Nigel C JonesTerence J O'Brien
Dec 14, 2012·Expert Review of Clinical Pharmacology·Lieve DesbonnetJohn L Waddington

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