PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 8782971

Syncopes and seizures.

D Schmidt
View original source ↗Export metadata ↓

Abstract

A recent videometric analysis of 56 brief syncopes showed myoclonic activity in 90%, together with head turns, upward gaze, oral automatisms, righting movements and visual and auditory hallucinations in 60-80%. Characteristic precipitation factors, premonition features such as nausea, sweating and palpitation, brief duration (< 25 sec), absence of paroxysmal electroencephalogram activity and no evidence for disorientation, exhaustion or sleep after the attack, are useful discriminating factors.

Explore related subjects

Eye MovementsHumansSeizuresSyncopeJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

D Schmidt. 1996. Syncopes and seizures.. https://doi.org/10.1097/00019052-199604000-00003

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

KEEP EXPLORING

Related citations

PubMed1999

Retaining the equilibrium point hypothesis as an abstract description of the neuromuscular system.

The lambda version of the equilibrium point (EP) hypothesis for motor control is examined in light of recent criticisms of its various instantiations. Four important assumptions that have formed the basis for recent criticism are analyzed: First, the assumption that intact muscles possess invariant force-length characteristics (ICs). Second, that these ICs are of the same form in agonist-antagonist pairs. Third, that muscle control is monoparametric and that the control parameter, lambda, can be given a neurophysiological interpretation. Fourth, that reflex loop time delays and the known, asymmetric, nonlinear mechanical properties of muscles can be ignored. Mechanical and neurophysiological investigations of the neuromuscular system suggests that none of these assumptions is likely to be correct. This has been taken to mean that the EP hypothesis is oversimplified and a new approach is needed. It is argued that such an approach can be provided without rejecting the EP hypothesis, rather to regard it as an input-output description of muscle and associated segmental circuits. The operation of the segmental circuitry can be interpreted as having the function, at least in part, of compensating for a variety of nonlinearities and asymmetries such that the overall system implements the lambda-EP model equations.

Eye Movements↗
PubMed1999

High-level scene perception.

Three areas of high-level scene perception research are reviewed. The first concerns the role of eye movements in scene perception, focusing on the influence of ongoing cognitive processing on the position and duration of fixations in a scene. The second concerns the nature of the scene representation that is retained across a saccade and other brief time intervals during ongoing scene perception. Finally, we review research on the relationship between scene and object identification, focusing particularly on whether the meaning of a scene influences the identification of constituent objects.

Eye Movements↗