Neural network gamma oscillation (Gamma oscillation)

Neural network gamma oscillations are rhythmic patterns of neuronal activity typically occurring in the frequency range of 30 to 100 Hz [1]. These oscillations arise from the coordinated interaction between excitatory pyramidal neurons and inhibitory interneurons, particularly parvalbumin-positive (PV+) cells [2]. They are critical for high-level cognitive functions, including attention, working memory, and sensory perception, by facilitating precise timing for information transfer across brain regions [3]. In various neuropsychiatric and neurodegenerative disorders, such as schizophrenia and Alzheimer's disease, gamma oscillations are often found to be diminished or disorganized [4][5]. While not a single molecular target, gamma oscillations serve as a functional biomarker and a therapeutic endpoint for drugs and sensory stimulation therapies aimed at restoring network synchrony [6]. Therapeutic strategies often focus on modulating GABAergic or glutamatergic neurotransmission to normalize these rhythms [1][6]. Sources: [1] Buzsáki G, Wang XJ. Mechanisms of gamma oscillations. Annu Rev Neurosci. 2012;35:203-225. [2] Sohal VS, et al. Parvalbumin neurons and gamma rhythms enhance cortical circuit performance. Nature. 2009;459(7247):698-702. [3] Ward LM. Synchronous neural oscillations and cognitive processes. Trends Cogn Sci. 2003;7(12):553-559. [4] Uhlhaas PJ, Singer W. Abnormal neural dynamics and networks in schizophrenia. Nat Rev Neurosci. 2010;11(2):100-113. [5] Iaccarino HF, et al. Gamma frequency entrainment attenuates amyloid load and modifies microglia. Nature. 2016;540(7632):230-235. [6] Adaikkan C, Tsai LH. Gamma Oscillations: From Mechanisms to Cognitive Function and Therapies. Front Neural Circuits. 2020;14:54.

Other names

Gamma rhythmGamma wave40 Hz oscillationFast neural oscillationGamma-band activity

Modulation of parvalbumin-positive interneuron activity and NMDA/AMPA receptor-mediated glutamatergic signaling to restore or enhance rhythmic synchronized firing at 30-100 Hz [1][2][6].