What does background slowing mean on an EEG?

Background slowing is present when the identifiable PDR is slower than the lower limit for the patient’s age. See the image below. A typical example of background slowing, which is nonspecific but often due to an underlying neurocognitive disorder or effect of sedating medications.

What causes temporal lobe 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 does an abnormal EEG indicate?

An abnormal EEG means that there is a problem in an area of brain activity. This can offer a clue in diagnosing various neurological conditions.

Can EEG show dementia?

The reduction in EEG microstate duration correlated with loss of cognitive function. Therefore, temporospatial analysis of the EEG record is a useful indicator of cortical dysfunction in dementia and correlates with the degree of cognitive impairment.

What is intermittent slowing?

Intermittent slowing: This involves bursts of generalized slowing, usually polymorphic delta. More rarely, the intermittent bursts are in the theta frequency range, and occasionally they can be rhythmic rather than polymorphic.

What does frontal lobe slowing mean?

The frontal lobe is associated with negative symptoms and cognitive abilities such as attention, with negative symptoms and impaired attention associated with poor functional capacity. Aims. To establish whether frontal dysfunction, as indexed by slowing, would be associated with functional impairments.

What does left temporal slowing mean on an EEG?

Temporal slowing just means that the brain waves in that area are slower frequency than would be expected. Sometimes this can occur from seizure activity arising from deeper areas of the brain but by the time it’s picked up on EEG, it’s just seen as slow waves and not as clear ‘epileptiform’ or seizure activity.

Can an EEG detect dementia?

Therefore, temporospatial analysis of the EEG record is a useful indicator of cortical dysfunction in dementia and correlates with the degree of cognitive impairment. Apparently, temporospatial analysis may be useful in distinguishing patients with dementia from those experiencing normal aging.

Can an EEG show memory loss?

The new findings show that EEG measures of synchronized neural activity can precisely track the contents of memory at almost the speed of thought, he says.

Does EEG measure memory?

Individual EEG measures of attention, memory, and motivation predict population level TV viewership and Twitter engagement.

What kind of slowing does an EEG show?

Focal and Generalized Slowing and Significance. EEG can provide evidence for underlying diffuse or focal cerebral dysfunction through demonstration of background slowing. The two main types of slowing are focal and generalized slowing.

How is an EEG used to diagnose cerebral dysfunction?

EEG can provide evidence for underlying diffuse or focal cerebral dysfunction through demonstration of background slowing. The two main types of slowing are focal and generalized slowing.

When is the EEG normal in Alzheimer disease?

Early in the course of a slowly progressive neurodegenerative dementia, such as Alzheimer disease, the EEG may be normal during wakefulness and sleep. Later, as the disease progresses, there is frequently mild generalized background slowing. Focal slowing may also be seen.

Can a EEG show evidence of focal dysfunction?

In a few situations in clinical neurology, the EEG may show clear evidence of focal dysfunction (ie, focal slow) while no structural abnormality is found. The typical cases in point are the focal epilepsies.