User:Tinatsang/week2

This kind of machine is divided into three part: emotion receiver, brain activity receiver and analyst. Receivers can infer one’s feelings from radio frequency reflected of his body. Radio is like an elastic ball which constantly bounce between individual’s body and the machine itself. It captures individual’s heartbeats，respiration and electrical activities in their brain and then analyzes them to infer a person’s emotions. After that, the machine will come out with different kinds of reaction to people's emotion. Band Frequency (Hz) Location Normally Pathologically Delta < 4 frontally in adults, posteriorly in children; high-amplitude waves • adult slow-wave sleep • in babies • Has been found during some continuous-attention tasks[46] • subcortical lesions • diffuse lesions • metabolic encephalopathy hydrocephalus • deep midline lesions Theta 4 – 7 Found in locations not related to task at hand • higher in young children • drowsiness in adults and teens • idling • Associated with inhibition of elicited responses (has been found to spike in situations where a person is actively trying to repress a response or action).[46] • focal subcortical lesions • metabolic encephalopathy • deep midline disorders • some instances of hydrocephalus Alpha 8 – 15 posterior regions of head, both sides, higher in amplitude on dominant side. Central sites (c3-c4) at rest • relaxed/reflecting • closing the eyes • Also associated with inhibition control, seemingly with the purpose of timing inhibitory activity in different locations across the brain. • coma Beta 16 – 31 both sides, symmetrical distribution, most evident frontally; low-amplitude waves • range span: active calm -> intense -> stressed -> mild obsessive • active thinking, focus, hi alert, anxious • benzodiazepines Gamma 32 + Somatosensory cortex • Displays during cross-modal sensory processing (perception that combines two different senses, such as sound and sight)[47][48] • Also is shown during short-term memory matching of recognized objects, sounds, or tactile sensations • A decrease in gamma-band activity may be associated with cognitive decline, especially when related to the theta band; however, this has not been proven for use as a clinical diagnostic measurement Mu 8 – 12 Sensorimotor cortex • Shows rest-state motor neurons.[49] • Mu suppression could indicate that motor mirror neurons are working. Deficits in Mu suppression, and thus in mirror neurons, might play a role in autism.[50] Comparison of EEG bands