scholarly journals P2-358: Age-related changes of the brain white matter associated with electrophysiological and behavioral processing of visual motion

2011 ◽  
Vol 7 ◽  
pp. S428-S428
Author(s):  
Voyko Kavcic
Keyword(s):  
White Matter ◽  
Visual Motion ◽  
Brain White Matter ◽  
Age Related ◽  
The Brain ◽  
Age Related Changes

Changes in Brain White Matter Assessed Via Textural Features Using a Neural Network

2010 ◽  
Vol 5 (2) ◽  
pp. 37-48
Author(s):  
R. Kalpana ◽  
S. Muttan ◽  
B. Agrawala
Keyword(s):  
Neural Network ◽  
White Matter ◽  
Diffusion Tensor ◽  
Age Groups ◽  
Elderly Subjects ◽  
Textural Features ◽  
Statistical Parameters ◽  
Brain White Matter ◽  
Age Related ◽  
The Brain

Diffusion Tensor Magnetic Resonance Imaging (DTMRI) has proved useful for microstructure characterization of the brain. This technique also helps determining complex connectivity of fiber tracts. The brain white matter (BMW) changes with respect to age and corresponding appearance of white-matter lesions among the brain’s message-carrying axons affects cognitive functions in old age. In this paper, the observed morphology in BWM on ageing is analyzed using statistical parameters extracted from DTMR images of different age groups. The gray level co-occurrence matrix (GLCM) obtained from the segmented images gives 14 textural features, subsets of which are adopted as the input sets in a backpropagation neural network classifier. The network is trained to predict the age based on BMW details used as the inputs. The proposed method helps in understanding the age-related changes in white matter. This is useful for the physician in understanding miscorrelation in motor activities and relevant causes in elderly subjects.

Changes in Brain White Matter Assessed Via Textural Features Using a Neural Network

2012 ◽  
pp. 144-153
Author(s):  
R. Kalpana ◽  
S. Muttan ◽  
B. Agrawala
Keyword(s):  
Neural Network ◽  
White Matter ◽  
Diffusion Tensor ◽  
Age Groups ◽  
Textural Features ◽  
Brain White Matter ◽  
Age Related ◽  
Segmented Images ◽  
Motor Activities ◽  
The Brain

Diffusion Tensor Magnetic Resonance Imaging (DTMRI) has proved useful for microstructure characterization of the brain. This technique also helps determining complex connectivity of fiber tracts. The brain white matter (BMW) changes with respect to age and corresponding appearance of white-matter lesions among the brain’s message-carrying axons affects cognitive functions in old age. In this paper, the observed morphology in BWM on ageing is analyzed using statistical parameters extracted from DTMR images of different age groups. The gray level co-occurrence matrix (GLCM) obtained from the segmented images gives 14 textural features, subsets of which are adopted as the input sets in a backpropagation neural network classifier. The network is trained to predict the age based on BMW details used as the inputs. The proposed method helps in understanding the age-related changes in white matter. This is useful for the physician in understanding miscorrelation in motor activities and relevant causes in elderly subjects.

Age-related changes in white matter integrity: A diffusion tensor imaging study

NeuroImage ◽  
2009 ◽  
Vol 47 ◽  
pp. S128
Author(s):  
H Lemaitre ◽  
S Marenco ◽  
M Emery ◽  
T Alam ◽  
M Geramita ◽  
...  
Keyword(s):  
Diffusion Tensor Imaging ◽  
White Matter ◽  
Diffusion Tensor ◽  
Imaging Study ◽  
White Matter Integrity ◽  
Age Related ◽  
Diffusion Tensor Imaging Study ◽  
Age Related Changes

Age-related changes in the brain transfer of blood-borne horseradish peroxidase in the hippocampus of senescence-accelerated mouse

1997 ◽  
Vol 93 (3) ◽  
pp. 233-240 ◽  
Author(s):  
M. Ueno ◽  
Ichiro Akiguchi ◽  
Masanori Hosokawa ◽  
Masahiko Shinnou ◽  
Haruhiko Sakamoto ◽  
...  
Keyword(s):  
Horseradish Peroxidase ◽  
Age Related ◽  
The Brain ◽  
Senescence Accelerated Mouse ◽  
Age Related Changes

Aging, cognition, and the brain: effects of age-related variation in white matter integrity on neuropsychological function

2018 ◽  
Vol 23 (7) ◽  
pp. 831-839 ◽  
Author(s):  
Yang-Teng Fan ◽  
Ya-Wen Fang ◽  
Ya-Ping Chen ◽  
Eric D. Leshikar ◽  
Ching-Po Lin ◽  
...  
Keyword(s):  
White Matter ◽  
White Matter Integrity ◽  
Neuropsychological Function ◽  
Related Variation ◽  
Age Related ◽  
The Brain

Exercise Impacts Age-Related Changes in Cognitive Function and Neural Complexity

2016 ◽  
Vol 5 (1) ◽  
pp. 30-38 ◽  
Author(s):  
Jennifer J. Heisz ◽  
Ana Kovacevic
Keyword(s):  
Older Adults ◽  
Cognitive Function ◽  
Executive Functions ◽  
Cognitive Outcomes ◽  
Physically Active ◽  
Age Related ◽  
The Neural Network ◽  
Future Work ◽  
The Brain ◽  
Age Related Changes

Age-related changes in the brain can compromise cognitive function. However, in some cases, the brain is able to functionally reorganize to compensate for some of this loss. The present paper reviews the benefits of exercise on executive functions in older adults and discusses a potential mechanism through which exercise may change the way the brain processes information for better cognitive outcomes. Specifically, older adults who are more physically active demonstrate a shift toward local neural processing that is associated with better executive functions. We discuss the use of neural complexity as a sensitive measure of the neural network plasticity that is enhanced through exercise. We conclude by highlighting the future work needed to improve exercise prescriptions that help older adults maintain their cognitive and physical functions for longer into their lifespan.

Relative potencies of testosterone and 5α-dihydrotestosterone on crowing and cloacal gland growth in the Japanese quail (Coturnix coturnix japonica)

1984 ◽  
Vol 100 (1) ◽  
pp. 19-23 ◽  
Author(s):  
J. Balthazart ◽  
M. Schumacher ◽  
G. Malacarne
Keyword(s):  
Coturnix Japonica ◽  
Coturnix Coturnix Japonica ◽  
Coturnix Coturnix ◽  
Behavioural Activity ◽  
Age Related ◽  
Female Quail ◽  
The Brain ◽  
Relative Potencies ◽  
Cloacal Gland ◽  
Age Related Changes

ABSTRACT It has been suggested that testosterone is less effective at inducing crowing behaviour in young birds than in adults because of the presence of higher levels of steroid 5β-reductase in the young brain, which converts testosterone to inactive 5β-reduced metabolites. This hypothesis was tested indirectly by comparing the relative potencies of 5α-dihydrotestosterone (5α-DHT), which cannot be converted to 5β-metabolities, and testosterone at inducing crowing in young gonadectomized male and female quail. The promotion of cloacal gland growth by these treatments was also assessed since there are no age-related changes in 5β-reductase in this organ. Silicone elastomer implants (2·5, 5 and 10 mm) containing 5α-DHT were more effective at stimulating crowing than similar implants of testosterone whilst there was little difference in their potency at inducing cloacal gland growth. These results are consistent with the hypothesis that brain steroid 5β-reductase regulates the behavioural activity of testosterone in the brain of young birds. J. Endocr. (1984) 100, 19–23

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