2016
DOI: 10.1097/wnr.0000000000000572 View full text |Buy / Rent full text
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Abstract: In recent years, noninvasive focused ultrasound stimulation (FUS), with the advantage of high spatial resolution and high penetration depth, has developed rapidly for modulating neuron activities in the brain. Gamma oscillations serve to synchronize neurons and play important roles in cortical information processing and cognitive function. However, how FUS modulates gamma oscillations in the rat hippocampus is not well understood. In this work, we characterized the interactions between the gamma amplitude and … Show more

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“…Our results showed increased delta-gamma coupling in Tg/Stim+ mice on day 14 compared to baseline. Our results are consistent with a previous study by Yi Yuan et al, which showed that the PAC indices between the delta, theta, alpha, and gamma oscillations increased significantly with ultrasound stimulation [ 50 ], and thereby concluded that the ultrasound stimulation could be a powerful noninvasive method to interfere with the brain by modulating gamma oscillations in the rat hippocampus. Taken together, all of these results support that gamma-band entrainment by tUS stimulation at 40 Hz can normalize PLV and cross-frequency coupling, implying improved brain connectivity and information processing.…”
Section: Discussionsupporting
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“…Our results showed increased delta-gamma coupling in Tg/Stim+ mice on day 14 compared to baseline. Our results are consistent with a previous study by Yi Yuan et al, which showed that the PAC indices between the delta, theta, alpha, and gamma oscillations increased significantly with ultrasound stimulation [ 50 ], and thereby concluded that the ultrasound stimulation could be a powerful noninvasive method to interfere with the brain by modulating gamma oscillations in the rat hippocampus. Taken together, all of these results support that gamma-band entrainment by tUS stimulation at 40 Hz can normalize PLV and cross-frequency coupling, implying improved brain connectivity and information processing.…”
Section: Discussionsupporting
“…LIPUS modulates (excites or inhibits) neuronal activity and causes neural oscillations, which not only reflect the characteristics of the brain activity itself but also yield clues into the underlying associated neural dynamics [ 6 , 7 ]. Evidences shows that LIPUS can induce neural responses in vitro [ 8 ], promote protein expression [ 9 , 10 ], induce a hemodynamic response [ 11 , 12 ], and causally modulate brain activity [ 13 15 ], including the induction of motor responses [ 16 , 17 ].…”
Section: Introductionmentioning
“…Transcranial FUS was used to selectively modulate neural tissue excitability of the brain cortical regions, such as sensory, motor, and visual areas . The technique has also been applied to modulate the function of deep brain areas, for example, the hippocampus or the thalamus in rodents . Its utility has been extended to provide means for brain stimulation in the context of brain‐to‐brain interface …”
Section: Introductionmentioning
“…5,9,10 The technique has also been applied to modulate the function of deep brain areas, for example, the hippocampus or the thalamus in rodents. [11][12][13][14] Its utility has been extended to provide means for brain stimulation in the context of brain-to-brain interface. 15,16 The presence of durable changes on neural excitability induced by a brain stimulation modality, assimilating the effects such as long-term potentiation (LTP) or long-term depression (LTD), is considered one of the main features that may ultimately lead to neuroplasticity.…”
Section: Introductionmentioning