The corticosteroid receptor hypothesis of depression.

Applications of the Morris water maze in the study of learning and memory.

Sharp wave ripples (SPW-Rs) represent the most synchronous population pattern in the mammalian brain. Their excitatory output affects a wide area of the cortex and several subcortical nuclei. SPW-Rs occur during "off-line" states of the brain, associated with consummatory behaviors and non-REM sleep, and are influenced by numerous neurotransmitters and neuromodulators. They arise from the excitatory recurrent system of the CA3 region and the SPW-induced excitation brings about a fast network oscillation (ripple) in CA1. The spike content of SPW-Rs is temporally and spatially coordinated by a consortium of interneurons to replay fragments of waking neuronal sequences in a compressed format. SPW-Rs assist in transferring this compressed hippocampal representation to distributed circuits to support memory consolidation; selective disruption of SPW-Rs interferes with memory. Recently acquired and pre-existing information are combined during SPW-R replay to influence decisions, plan actions and, potentially, allow for creative thoughts. In addition to the widely studied contribution to memory, SPW-Rs may also affect endocrine function via activation of hypothalamic circuits. Alteration of the physiological mechanisms supporting SPW-Rs leads to their pathological conversion, "p-ripples," which are a marker of epileptogenic tissue and can be observed in rodent models of schizophrenia and Alzheimer's Disease. Mechanisms for SPW-R genesis and function are discussed in this review.

https://onlinelibrary.wiley.com/doi/pdf/10.1002/hipo.22488

Hippocampal sharp wave‐ripple: A cognitive biomarker for episodic memory and planning

The pharmacology, neuroanatomy and neurogenetics of one-trial object recognition in rodents.

Effects of unpredictable chronic mild stress on anxiety and depression-like behavior in mice.

Transgenic mice expressing antisense directed against glucocorticoid receptor (GR) mRNA were used for a longitudinal study on the effects of hypothalamic-pituitary-adrenocortical dysfunction on anxiety-related behaviour and locomotor activity. Compared with age-matched controls and 5-week-old transgenic animals, 13- and 36-week-old transgenic mice made significantly more entries into and spent significantly more time on the open arms of the elevated plus-maze thereby indicating reduced basal anxiety. In contrast, time spent in the central area of the open field was significantly reduced in transgenic animals indicating an enhanced anxiety under conditions of increased stress. Locomotor activity did not differ between transgenic and control animals. Our results indicate that behavioural changes in transgenic mice differ according to the age of the animals and the behavioural paradigm used. Transgenic animals with an impaired GR function may be of help in studying the interaction of ageing, GR function and the development of behavioural abnormalities.

Age- and stimulus dependent changes in anxiety-related behaviour of transgenic mice with GR dysfunction.

C-type natriuretic peptide exerts effects opposing those of atrial natriuretic peptide on anxiety-related behaviour in rats

Behavioural performance in three substrains of mouse strain 129

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Age- and stimulus dependent changes in anxiety-related behaviour of transgenic mice with GR dysfunction.

C-type natriuretic peptide exerts effects opposing those of atrial natriuretic peptide on anxiety-related behaviour in rats

Behavioural performance in three substrains of mouse strain 129