PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 6777464

Seizure-induced neglect.

K M Heilman·G J Howell
View original source ↗Export metadata ↓

Abstract

A man with intermittent right parieto-occipital seizures was monitored by electroencephalography while he received 60 trials of being touched on the right, left, or both hands. Half of the trials were given during a focal seizure, and half were given interictally. While the patient was having seizures, he appropriately responded to all 10 stimuli delivered to the right hand, but four of 10 responses were incorrect (allaesthetic) when he was stimulated on the left. With bilateral simultaneous stimulation he neglected the left hand in all 10 trials. His interictal performance was flawless. When given a line-bisection task on two occasions during a seizure, the patient attempted to make a mark to the left of the entire sheet of paper. Immediately postictally he made a mark at the right end of the line. The case illustrates that focal seizures may induce elements of the neglect syndrome and that attention (to contralateral stimuli) and intention to perform (in the contralateral hemispatial field) may be dissociable phenomena.

Explore related subjects

AttentionAuditory PerceptionDominance, CerebralElectroencephalographyEpilepsies, PartialEvoked PotentialsHumansMaleMiddle AgedOccipital LobeParietal LobeTouchCase ReportsJournal ArticleResearch Support, U.S. Gov't, P.H.S.

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

K M Heilman, G J Howell. 1980. Seizure-induced neglect.. https://doi.org/10.1136/jnnp.43.11.1035

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2007

A low glycaemic index breakfast cereal preferentially prevents children's cognitive performance from declining throughout the morning.

This study investigated whether the glycaemic index (GI) of breakfast cereal differentially affects children's attention and memory. Using a balanced cross-over design, on two consecutive mornings 64 children aged 6-11 years were given a high GI cereal and a low GI cereal in a counterbalanced order. They performed a series of computerised tests of attention and memory, once prior to breakfast and three times following breakfast at hourly intervals. The results indicate that children's performance declines throughout the morning and that this decline can be significantly reduced following the intake of a low GI cereal as compared with a high GI cereal on measures of accuracy of attention (M=-6.742 and -13.510, respectively, p<0.05) and secondary memory (M=-30.675 and -47.183, respectively, p<0.05).

Attention↗
PubMed2007

Inhibitory control test is a simple method to diagnose minimal hepatic encephalopathy and predict development of overt hepatic encephalopathy.

OBJECTIVES: To compare inhibitory control test (ICT), a simple/rapid test of attention, to a standard psychometric battery (SPT) to diagnose minimal hepatic encephalopathy (MHE) and predict development of overt hepatic encephalopathy (OHE) in cirrhotic patients. METHODS: Fifty nonalcoholic cirrhotics and 50 age/educational-status-matched controls were given ICT and SPT in the same sitting. Performance impaired beyond two standard deviations of controls was considered MHE in cirrhotics. ICT results (lure/target response and lures/person) were compared between controls and cirrhotics and within cirrhotics with/without MHE. Receiver-operating characteristic analysis was used to study ICT for MHE diagnosis. Twenty subjects were administered SPT and ICT twice to assess test-retest reliability. All cirrhotics were followed routinely for the development of OHE. RESULTS: Cirrhotics performed worse than controls on SPT and ICT. Using SPT, 39 cirrhotics had MHE. ICT was administered faster than SPT (15 vs 37 min). Cirrhotics with MHE had significantly higher lure (28%vs 3%) and lower target response (91%vs 96%) compared with those without MHE. Lure/person >5 had 90% sensitivity/specificity for MHE diagnosis. AUC for receiver-operating characteristic for lures alone was 95.8%. Lure and target responses were highly correlated (r= 0.9) between sessions showing high test-retest reliability. Five (10%) patients developed OHE on f/u of 26 +/- 10 months; all five had been diagnosed with MHE using ICT and SPT. None of the five patients with discordant results on SPT and ICT developed OHE. CONCLUSIONS: ICT has good sensitivity/specificity for MHE diagnosis, is reliable and is equivalent to SPT for predicting OHE development.

Attention↗