What causes left temporal slowing on EEG?
Several different etiologies may provoke generalized background slowing, including the effects of sedative centrally acting medications, neurodegenerative disorders, a widespread neurodevelopmental process, hydrocephalus, metabolic or toxic encephalopathy, CNS infectious disorders such as meningoencephalitis, or even a …
What causes left temporal slowing?
Often, the cause of temporal lobe seizures remains unknown. However, they can be a result of a number of factors, including: Traumatic brain injury. Infections, such as encephalitis or meningitis, or a history of such infections.
What do low brain waves mean?
When slower brain waves are dominant we can feel sluggish, inattentive and scattered, and can feel depressed or develop insomnia. When higher frequencies abound, we are engaged in critical thinking, hyper-alertness or anxiety, but can also result in nightmares, hyper-vigilance and impulsive behaviour.
What is mild cerebral dysfunction on EEG?
Mild cerebral dysfunction: Mild slowing on EEG means that there is a mild degree of cerebral dysfunction. Mild diffuse slowing on EEG can be in the form of a slowed PDR: the PDR is present, but it is 8 Hz or slower.
Can slow brain waves cause seizures?
Slow waves (≤4 Hz) can be found in seizures with impairment of consciousness and also occur in focal seizures without impairment of consciousness but with inhibited access to memory functions.
What are slow brain waves called?
Delta waves are the slowest recorded brain waves in human beings. They are found most often in infants and young children, and are associated with the deepest levels of relaxation and restorative, healing sleep.
Which brain waves are associated with deep sleep?
Delta waves are associated with the deep sleep stages: stage 3 and REM. During stage 3, less than half of brain waves consist of delta waves, while more than half of brain activity consists of delta waves during REM sleep.
What happens in slow wave sleep?
Slow-wave sleep (SWS) refers to phase 3 sleep, which is the deepest phase of non-rapid eye movement (NREM) sleep, and is characterized by delta waves (measured by EEG). Dreaming and sleepwalking can occur during SWS. SWS is thought to be important for memory consolidation.
Does hippocampus affect memory?
Hippocampus and memory The hippocampus helps humans process and retrieve two kinds of memory, declarative memories and spatial relationships. Declarative memories are those related to facts and events. Examples include learning how to memorize speeches or lines in a play.
What do slow waves in the brain look like?
The slow waves look more like the kind of waves you’d have all over the brain if you were asleep, but since they’re happening in one small area even when you’re awake, that’s what makes them abnormal. They call it “focal slowing” because the low frequency waves are confined to a limited (focused) area of the brain.
Are slow waves on EEG dominant on the left side?
In 16 EEG records of healthy subjects with temporal slow waves of any type, left side predominance was again seen (56% vs 13%). In all records with temporal slow waves, the foci of the slow wave were at anterio-temporal or mid-temporal areas.
Why do temporal slow waves appear predominantly on the left side?
Although the reason for temporal slow waves appearing predominantly on the left side remains unclear, one possible explanation is hemispheral dominance. That is, greater stress of the dominant hemisphere could result in more frequent occurrence of vascular pathology.
What does it mean when your brain waves are high?
When higher frequencies abound, we are engaged in critical thinking, hyper-alertness or anxiety, but can also result in nightmares, hyper-vigilance and impulsive behaviour. Delta Waves (1-4 Hz) are slow brainwaves, which begin to appear in stage 3 of the sleep-cycle, and by stage 4 dominate almost all EEG activity.
