Conversely, high-frequency vocalizations, often termed 50-kHz calls, occur during or in anticipation of juvenile rough-and-tumble play [19], [20], mating [21] [28], food consumption [29], electrical self-stimulation of the brain [29], [30], and addictive drugs [31] [35].
The memory enhancing effects of post-training aversive events such as footshock and of rewarding events such as electrical self-stimulation of the brain, and ingestion or injection of sucrose or glucose are well-documented.
Standard coils used in research and the clinic for noninvasive magnetic stimulation of the human brain are not capable of stimulating deep brain regions directly.
Likewise, the alternative method of transcranial alternating current stimulation (tACS) allows stimulation of the human brain at frequencies of biologically relevant brain rhythms [ 1, 2].
Thut, G., Schyns, P. G. & Gross, J. Entrainment of perceptually relevant brain oscillations by non-invasive rhythmic stimulation of the human brain.
