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A gamma wave or gamma rhythm is a pattern of neural oscillation in humans with a frequency between 30 and 100 Hz, the 40 Hz point being of particular interest. [1] Gamma rhythms are correlated with large-scale brain network activity and cognitive phenomena such as working memory , attention , and perceptual grouping , and can be increased in ...
Gamma oscillations are reduced in Alzheimer’s disease. Gamma oscillations are high-frequency waves in the brain that play a role in many cognitive processes and working memory — the type of ...
Based on this model initial memories of the events are formed during the acquisition and reinforced during replay. Acquisition occurs by theta and gamma waves activating a neuronal pathway for initial formation of the memory. Later this pathway would get replayed following the SPW-Rs propagation to neocortex.
Coupling between theta and gamma activity is thought to be vital for memory functions, including episodic memory. [104] [105] Tight coordination of single-neuron spikes with local theta oscillations is linked to successful memory formation in humans, as more stereotyped spiking predicts better memory. [106]
Alcohol acts as a general central nervous system depressant, but it also affects some specific areas of the brain to a greater extent than others. Memory impairment caused by alcohol has been linked to the disruption of hippocampal function—particularly affecting gamma-Aminobutyric acid (GABA) and N-methyl-D-aspartate (NMDA) neurotransmission which negatively impacts long-term potentiation ...
Explicit memory can be split into further subcategories; episodic memory, which is the memory of specific events and the information surrounding it, and semantic memory, which is the ability to remember factual information (e.g. what numbers mean). [11] A type of memory of main concern for memory erasure are emotional memories. These memories ...
Another study on humans has showed that theta oscillations determine memory function (encoding or recall) when interacting with high frequency gamma activity in the hippocampus. [12] These findings support the idea that theta oscillations support memory formation and retrieval in interaction with other oscillatory rhythms.
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