Eight-year-old Daria was having some disturbances in her sleep, so her parents took her to a children’s hospital to undergo vari
ous tests. She recalls sleeping in the hospital room with a bunch of wires stuck to her scalp. What technique was used in Daria’s sleep study?A) functional magnetic resonance imaging (fMRI)B) MEG (magnetoenchephalography)C) electroencephalograph (EEG)D) PET scan (positron-emission tomography)E) CT scan (computer axial tomography)
This is an electrophysioloical method of recoding the electrical activities in the brain. The process is non invasive and involves placing wires across different regions of the scalp. It measures the voltage fluctuations resulting from ionic current within the neurons of the brain. This helps to study the state of the brain and rule out disorders
The bunch of wires stuck to her scalp was to measure the ionic differences(Na +/K+) in axoplasm of her brain neuron, which when sum up from million of neurons at different electrode location on her scalp generated electrical field.When this passes through the brain tissues and eventually to the scalp it can be detected and measured as spikes of brain activity on the monitor. This techniques is called EEG, and it is used to monitor electrical activities of the brain.
it is used for diagnosis of epilepsy,seizure, nacolepsy-sleep disorders etc.
Its operation principle is that any alteration from the usual spikes of electrical activities of the brain must be due to an anomaly in the brain's function.
When living in colder climates, people tend to build their buildings, shops, etc with more insulation and heavier materials so that heat resonates as best as it can in the building.
