changes in brain waves
Introduction
Introduction There are magnetic fields in people, but when people think, the magnetic field will change, forming a kind of biological current through the magnetic field, and I will position it as "brain wave". By conserving energy, the more we think The stronger the electric wave is, the more it can explain why a lot of mental work leads to greater hunger than manual labor. There are many functional regional brain wave rhythms in the human brain. These brain wave movements are inseparable from human thinking and learning.
Cause
Cause
There are many functional regional rhythm movements in the human brain. (1) Mu rhythm: about between 10 and 20 Hz, the main area is the sensory motor area. (2) Tau rhythm: about 8~10 Hz, the upper temporal lobe (3) sigma rhythm: about 7~9 Hz, and the sensory area (4) Alpha rhythm: about 10 Hz, the presence area is the occipital lobe visual area. These Brain rhythm have specific functions and specific areas of existence, so they can be used for functional analysis of specific areas. However, these signals of the brain wave are non-phase-locked-signals, so the results cannot be obtained by the general event-related potential (ERP) direct averaging method, but must be calculated using nonphase-locked analysis techniques. The reaction produced by external stimuli. When there is an obstacle in signal transmission, brain wave changes occur.
Examine
an examination
Related inspection
Brain CT examination brain MRI examination EEG examination brain nerve examination
The EEG can check for changes in brain waves. EEG is a modern auxiliary examination method that uses the EEG to record the weak bioelectrical amplification of the brain into a graph to help diagnose the disease. It does not cause any trauma to the examinee. An electroencephalogram is an information map that records brain waves at a certain moment. Brain waves are biological waves that are released from the human brain.
Diagnosis
Differential diagnosis
These are spontaneous rhythmic nerve electrical activities whose frequency varies from 1 to 30 times per second and can be divided into four bands, namely (1-3 Hz), (4-7 Hz), ( 8-13 Hz), (14-30 Hz).
The delta wave has a frequency of 1-3 times per second. This band can occur when a person is in an infancy or an immature mental development, and an adult is extremely tired and drowsy.
The wave, with a frequency of 4-7 times per second, is extremely significant for adults who are frustrated and depressed, as well as for psychotic patients. But this wave is the main component of the electroencephalogram of juveniles (10-17 years old).
The alpha wave has a frequency of 8-13 times per second and an average of about 10 times. It is the basic rhythm of normal human brain waves. If there is no external stimulus, the frequency is quite constant. The rhythm is most pronounced when the person is awake, quiet, and closes his eyes. When he opens his eyes or receives other stimuli, the alpha wave disappears instantly.
The beta wave, with a frequency of 14-30 times per second, occurs when mental stress and emotional agitation or excitement. When a person wakes up from sleep, the original slow wave rhythm can be immediately replaced by the rhythm.
