Biomaterial Database

Effect of interictal epileptiform discharges on EEG-based functional connectivity networks. 2020

Derek K Hu, and Andrew Mower, and Daniel W Shrey, and Beth A Lopour

Department of Biomedical Engineering, University of California, Irvine, CA, USA.

Functional connectivity networks (FCNs) based on interictal electroencephalography (EEG) can identify pathological brain networks associated with epilepsy. FCNs are altered by interictal epileptiform discharges (IEDs), but it is unknown whether this is due to the morphology of the IED or the underlying pathological activity. Therefore, we characterized the impact of IEDs on the FCN through simulations and EEG analysis. We introduced simulated IEDs to sleep EEG recordings of eight healthy controls and analyzed the effect of IED amplitude and rate on the FCN. We then generated FCNs based on epochs with and without IEDs and compared them to the analogous FCNs from eight subjects with infantile spasms (IS), based on 1340 visually marked IEDs. Differences in network structure and strength were assessed. IEDs in IS subjects caused increased connectivity strength but no change in network structure. In controls, simulated IEDs with physiological amplitudes and rates did not alter network strength or structure. Increases in connectivity strength in IS subjects are not artifacts caused by the interictal spike waveform and may be related to the underlying pathophysiology of IS. Dynamic changes in EEG-based FCNs during IEDs may be valuable for identification of pathological networks associated with epilepsy.

UI	MeSH Term	Description	Entries
D007223	Infant	A child between 1 and 23 months of age.	Infants
D008297	Male		Males
D009415	Nerve Net	A meshlike structure composed of interconnecting nerve cells that are separated at the synaptic junction or joined to one another by cytoplasmic processes. In invertebrates, for example, the nerve net allows nerve impulses to spread over a wide area of the net because synapses can pass information in any direction.	Neural Networks (Anatomic),Nerve Nets,Net, Nerve,Nets, Nerve,Network, Neural (Anatomic),Networks, Neural (Anatomic),Neural Network (Anatomic)
D001921	Brain	The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.	Encephalon
D004569	Electroencephalography	Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain.	EEG,Electroencephalogram,Electroencephalograms
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012189	Retrospective Studies	Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.	Retrospective Study,Studies, Retrospective,Study, Retrospective
D013036	Spasms, Infantile	An epileptic syndrome characterized by the triad of infantile spasms, hypsarrhythmia, and arrest of psychomotor development at seizure onset. The majority present between 3-12 months of age, with spasms consisting of combinations of brief flexor or extensor movements of the head, trunk, and limbs. The condition is divided into two forms: cryptogenic (idiopathic) and symptomatic (secondary to a known disease process such as intrauterine infections; nervous system abnormalities; BRAIN DISEASES, METABOLIC, INBORN; prematurity; perinatal asphyxia; TUBEROUS SCLEROSIS; etc.). (From Menkes, Textbook of Child Neurology, 5th ed, pp744-8)	Cryptogenic Infantile Spasms,Hypsarrhythmia,Infantile Spasms,Jackknife Seizures,Nodding Spasm,Salaam Seizures,Spasmus Nutans,Symptomatic Infantile Spasms,West Syndrome,Cryptogenic West Syndrome,Lightning Attacks,Salaam Attacks,Symptomatic West Syndrome,Attack, Lightning,Attacks, Lightning,Attacks, Salaam,Cryptogenic Infantile Spasm,Hypsarrhythmias,Infantile Spasm,Infantile Spasm, Cryptogenic,Infantile Spasm, Symptomatic,Infantile Spasms, Cryptogenic,Infantile Spasms, Symptomatic,Jackknife Seizure,Lightning Attack,Nodding Spasms,Seizure, Jackknife,Seizures, Jackknife,Seizures, Salaam,Spasm, Cryptogenic Infantile,Spasm, Nodding,Spasm, Symptomatic Infantile,Spasms, Cryptogenic Infantile,Spasms, Nodding,Spasms, Symptomatic Infantile,Symptomatic Infantile Spasm,Syndrome, Cryptogenic West,Syndrome, Symptomatic West,Syndrome, West,West Syndrome, Cryptogenic,West Syndrome, Symptomatic