The article presents a review of modern studies the hippocampus’s functions in implementation cognitive phenomena, which covers wide range experimental areas, including high-precision brain morphometry, functional neuroimaging, electroencephalography, deep navigational electrode implantation, and dosed radiation effects on brain. Literary sources demonstrate involvement hippocampus almost all s...

An association between circadian clock function and mood regulation is well established and has been proposed as a factor in the development of mood disorders. Patients with depression or mania suffer disturbed sleep-wake cycles and altered rhythms in daily activities. Environmentally disrupted circadian rhythms increase the risk of mood disorders in the general population. However, proof that ...

In Drosophila, the neuropeptide pigment-dispersing factor (PDF) is required to maintain behavioral rhythms under constant conditions. To understand how PDF exerts its influence, we performed time-series immunostainings for the PERIOD protein in normal and pdf mutant flies over 9 d of constant conditions. Without pdf, pacemaker neurons that normally express PDF maintained two markers of rhythms:...

Circadian rhythms are periodic patterns in biological processes that allow the organisms to anticipate changes in the environment. These rhythms are driven by the suprachiasmatic nucleus (SCN), the master circadian clock in vertebrates. At a molecular level, circadian rhythms are regulated by the so-called clock genes, which oscillate in a periodic manner. The protein products of clock genes ar...

Aim of study (according to author) To study the effect of exposures to low intensity, very high frequency (VHF) electrical fields, amplitude modulated at biological frequencies on untrained and conditioned cats. Background/further details: A series of cats was operantly trained to produce specific transient brain rhythms following periodic presentations of a light flash stimulus (experiment 1)....

Honey bee workers care for ("nurse") the brood around the clock without circadian rhythmicity, but then they forage outside with strong circadian rhythms and a consolidated nightly rest. This chronobiological plasticity is associated with variation in the expression of the canonical "clock genes" that regulate the circadian clock: nurse bees show no brain rhythms of expression, while foragers d...