A hypothetical explanation of congenital nystagmus

1984 ◽  
Vol 50 (2) ◽  
pp. 119-134 ◽  
Author(s):  
Lance M. Optican ◽  
David S. Zee
Keyword(s):  
Congenital Nystagmus ◽  
Hypothetical Explanation

scholarly journals How can electric lighting contribute to human health and well-being?

2021 ◽  
Vol 53 (5) ◽  
pp. 515-522
Author(s):  
P Raynham
Keyword(s):  
Human Health ◽  
Psychological Impact ◽  
Health Benefits ◽  
Well Being ◽  
Health Problems ◽  
Starting Point ◽  
Electric Light ◽  
Health And Well Being ◽  
Hypothetical Explanation

Electric light in buildings may provide some health benefits; however, for most people these benefits are likely to be small. It is possible for electric lighting to cause health problems, if there is too little light or there is glare, but for the most part there is good guidance available and these problems can be avoided. The quality of the lit environment can have a psychological impact and this may in turn impact well-being. A starting point for this is perceived adequacy of illumination. Related lighting metrics are examined and a hypothetical explanation is suggested.

Spectral Analysis of Pendular Waveforms in Congenital Nystagmus

1989 ◽  
Vol 21 (2) ◽  
pp. 83-92 ◽  
Author(s):  
R. Reccia ◽  
G. Robert ◽  
P. Russo
Keyword(s):  
Spectral Analysis ◽  
Congenital Nystagmus

scholarly journals The effectiveness of surgery for congenital nystagmus

Eye ◽  
1999 ◽  
Vol 13 (1) ◽  
pp. 1-2
Author(s):  
Jon Whittle
Keyword(s):  
Congenital Nystagmus

Components of the neural signal underlying congenital nystagmus

2012 ◽  
Vol 220 (3-4) ◽  
pp. 213-221 ◽  
Author(s):  
Ozgur E. Akman ◽  
David S. Broomhead ◽  
Richard V. Abadi ◽  
Richard A. Clement
Keyword(s):  
Congenital Nystagmus ◽  
Neural Signal

The role of vision on postural strategy evaluated in patients affected by congenital nystagmus as an experimental model

1999 ◽  
Vol 9 (6) ◽  
pp. 445-451
Author(s):  
S. Di Girolamo ◽  
W. Di Nardo ◽  
A. Cosenza ◽  
F. Ottaviani ◽  
A. Dickmann ◽  
...  
Keyword(s):  
Visual System ◽  
Postural Control ◽  
Visual Stimulus ◽  
Postural Balance ◽  
Visual Cues ◽  
Normal Subjects ◽  
Congenital Nystagmus ◽  
Dynamic Posturography ◽  
Normal Controls

The role of vision in postural control is crucial and is strictly related to the characteristics of the visual stimulus and to the performance of the visual system. The purpose of this investigation was to evaluate the effects of chronically reduced visual cues upon postural control in patients affected by Congenital Nystagmus (CN). These patients have developed since birth a postural strategy mainly based on vestibular and somatosensorial cues. Fifteen patients affected by CN and 15 normal controls (NC) were enrolled in the study and evaluated by means of dynamic posturography. The overall postural control in CN patients was impaired as demonstrated by the equilibrium score and by the changes of the postural strategy. This impairment was even more enhanced in CN than in NC group when somatosensorial cues were experimentally reduced. An aspecific pattern of visual impairment and a pathological composite score were also present. Our data outline that in patients affected by CN an impairment of the postural balance is present especially when the postural control relies mainly on visual cues. Moreover, a decrease in accuracy of the somatosensory cues has a proportionally greater effect on balance than it has on normal subjects.

Carboxylesterase overexpression in the male reproductive tract: a universal safeguarding mechanism?

1999 ◽  
Vol 11 (3) ◽  
pp. 133 ◽  
Author(s):  
A. T. Mikhailov ◽  
M. Torrado
Keyword(s):  
Reproductive Tract ◽  
Expression Patterns ◽  
Cell Lineage ◽  
Environmental Chemicals ◽  
Male Reproductive Tract ◽  
Morphological Organization ◽  
Associated Functions ◽  
And Function ◽  
Hypothetical Explanation

Data on expression patterns of carboxylesterases in the male reproductive tract of different animal groups (i.e. bivalve mollusks, fruitflies and rodents) are summarized to highlight some particularly interesting questions in the context of sperm differentiation, maturation and function. The male reproduc-tive system, in spite of extreme variation in the anatomical/morphological organization in different species, is characterized by similar patterns of male-dependent carboxylesterase overexpression. The phenomenon of conserved carboxylesterase overexpression indicates similar male sex-associated functions of the enzymes. There is possible evidence of carboxylesterase recruitment by male reproductive-tract tissues indi-cating that it could be adaptive for spermatogenesis, sperm maturation and sperm use. Moreover, this idea can be extended to include a sperm cell lineage protection. This issue is discussed in the light of recent data on environmental reproductive xenobiotics that can provide a basis for a hypothetical explanation of car-boxylesterase overexpression in the male reproductive tract. Based on a well-known role of car-boxylesterases in detoxification of environmental chemicals such as organophosphate pesticides, it is proposed that various male genital tract carboxylesterases may be characterized by a similar physiological function to protect the male reproductive system against xenobiotic influences that could provoke its dys-function, thus altering sperm differentiation and maturation.

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