Psychology & Psychiatry

Mouse study finds that fearlessness can be learned

The neurotransmitter serotonin plays a key role in both the onset and in the unlearning of fear and anxiety. A research team from the Department of General Zoology and Neurobiology headed by Dr. Katharina Spoida and Dr. Sandra ...

Neuroscience

Silent synapses are abundant in the adult brain

MIT neuroscientists have discovered that the adult brain contains millions of "silent synapses"—immature connections between neurons that remain inactive until they're recruited to help form new memories.

Neuroscience

Major discovery about mammalian brains surprises researchers

In a new breakthrough to understand more about the mammalian brain, University of Copenhagen researchers have made an incredible discovery. Namely, a vital enzyme that enables brain signals is switching on and off at random, ...

Genetics

Discovery gives insight into brain function, breakdowns

Scientists at Oregon Health & Science University have identified a long-sought gene-encoded protein that enables the brain to communicate a broad range of signals across gaps between neurons, known as synapses. The discovery ...

Neuroscience

Revealing roles of dementia proteins in normal memory

New research has revealed how the tau protein, a critical element in the formation of Alzheimer's disease, is also involved in normal learning processes in the healthy brain—potentially providing a focal point for future ...

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Neurotransmitter

Neurotransmitters are endogenous chemicals which relay, amplify, and modulate signals between a neuron and another cell. Neurotransmitters are packaged into synaptic vesicles that cluster beneath the membrane on the presynaptic side of a synapse, and are released into the synaptic cleft, where they bind to receptors in the membrane on the postsynaptic side of the synapse. Release of neurotransmitters usually follows arrival of an action potential at the synapse, but may follow graded electrical potentials. Low level "baseline" release also occurs without electrical stimulation.

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