The Relationship of Sleep to Learning and Memory

1991 ◽  
Vol 20 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Li Deming ◽  
Wu Zhenyun ◽  
Shao Daosheng ◽  
Liu Shanxun
Keyword(s):  
Learning And Memory ◽  
Relationship Of ◽  
The Relationship

scholarly journals Relationship of Depression and function of Attention, Planning and Verbal Learning and Memory

2019 ◽  
Vol 8 (9) ◽  
pp. 214-225
Author(s):  
Nongmeikapam Premika Devi
Keyword(s):  
Learning And Memory ◽  
Verbal Learning ◽  
Education Level ◽  
Auditory Verbal Learning ◽  
And Function ◽  
Age Range ◽  
Relationship Of ◽  
The Relationship ◽  
Minimum Education ◽  
Hiv Aids

The present study examines the relationship of depression and the neuropsychologicalfunction of attention, planning and auditory verbal learning and memory among individualswith HIV/AIDS. 200 subjects who were HIV/AIDS positive (100 males and 100 females) andwere within age range of 20 to 50 years and minimum education level of 8th standard weretaken. The result indicates that Depression slows down the performance of attention; alsodepression most likely decreases the function of auditory verbal learning and memory

Does Apolipoprotein E Influence Learning and Memory in the Nondemented Oldest Old?

2001 ◽  
Vol 13 (4) ◽  
pp. 451-459 ◽  
Author(s):  
Anne Salo ◽  
Raija Ylikoski ◽  
Auli Verkkoniemi ◽  
Tuomo Polvikoski ◽  
Kati Juva ◽  
...  
Keyword(s):  
Apolipoprotein E ◽  
Learning And Memory ◽  
Verbal Fluency ◽  
Oldest Old ◽  
Very Elderly ◽  
Object Memory ◽  
Apoe Ε4 ◽  
Ε4 Allele ◽  
Relationship Of ◽  
The Relationship

The objective of this study was to analyze the relationship of the apolipoprotein E (apoE) ε4 and ε2 alleles to learning and memory performances in the nondemented oldest old. Forty-six nondemented persons aged 85 years or over from a randomly selected group of 128 subjects in Vantaa, Finland, were studied. ApoE genotyping was performed using the minisequencing technique. A structured clinical examination and interview were carried out. The test variables studied were learning and memory scores (from the Fuld Object-Memory Evaluation), verbal fluency, and conceptualization (the Similarities subtest of the WAIS-R). We compared apoE-ε4 carriers to noncarriers and apoE-ε2 carriers to noncarrirs. No statistically significant differences were found in any of the test variables. The results failed to confirm the hypotheses that poor cognitive performance is associated with the apoE-ε4 allele and good performance with the apoE-ε2 allele in the oldest old. This suggests that the apoE alleles do not have a detectable relationship to learning and memory in nondemented very elderly people.

The relationship of REM sleep with learning and memory in mice

1973 ◽  
Vol 9 (3) ◽  
pp. 383-388 ◽  
Author(s):  
James Pagel ◽  
Vernon Pegram ◽  
Sheila Vaughn ◽  
Pamela Donaldson ◽  
William Bridgers
Keyword(s):  
Learning And Memory ◽  
Rem Sleep ◽  
Relationship Of ◽  
The Relationship

scholarly journals Relationship of Depression and function of Attention, Planning and Verbal Learning and Memory

2019 ◽  
Vol 8 (8) ◽  
pp. 214-225
Author(s):  
Nongmeikapam Premika Devi
Keyword(s):  
Learning And Memory ◽  
Verbal Learning ◽  
Neuropsychological Function ◽  
Auditory Verbal Learning ◽  
And Function ◽  
Age Range ◽  
Relationship Of ◽  
The Relationship ◽  
Minimum Education ◽  
Hiv Aids

The present study examines the relationship of depression and the neuropsychological function of attention, planning and auditory verbal learning and memory among individuals with HIV/AIDS. 200 subjects who were HIV/AIDS positive (100 males and 100 females) and were within age range of 20 to 50 years and minimum education level of 8th standard were taken. The result indicates that Depression slows down the performance of attention; also depression most likely decreases the function of auditory verbal learning and memory.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Skeletal elements of crinoid echinoderms: High-resolution structural and microanalytical results

1983 ◽  
Vol 41 ◽  
pp. 194-195
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor
Keyword(s):  
High Resolution ◽  
Marine Invertebrates ◽  
Sea Urchins ◽  
Structural Features ◽  
Sea Stars ◽  
High Resolution Tem ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.

Studies on Leukemogenic and Sarcomagenic Viruses

1970 ◽  
Vol 28 ◽  
pp. 156-157
Author(s):  
Leon Dmochowski
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Morphological Properties ◽  
Mode Of Development ◽  
Relationship Of ◽  
The Relationship

Electron microscopy has proved to be an invaluable discipline in studies on the relationship of viruses to the origin of leukemia, sarcoma, and other types of tumors in animals and man. The successful cell-free transmission of leukemia and sarcoma in mice, rats, hamsters, and cats, interpreted as due to a virus or viruses, was proved to be due to a virus on the basis of electron microscope studies. These studies demonstrated that all the types of neoplasia in animals of the species examined are produced by a virus of certain characteristic morphological properties similar, if not identical, in the mode of development in all types of neoplasia in animals, as shown in Fig. 1.

The relationship of IGE receptor topography to signaling activity in RBL-2H3 mast cells

1991 ◽  
Vol 49 ◽  
pp. 236-237
Author(s):  
J.R. Pfeiffer ◽  
J.C. Seagrave ◽  
C. Wofsy ◽  
J.M. Oliver
Keyword(s):  
Mast Cells ◽  
Protein A ◽  
Scattered Electron ◽  
Ige Receptor ◽  
Receptor Complexes ◽  
Ige Binding ◽  
Electron Imaging ◽  
Small Clusters ◽  
Relationship Of ◽  
The Relationship

In RBL-2H3 rat leukemic mast cells, crosslinking IgE-receptor complexes with anti-IgE antibody leads to degranulation. Receptor crosslinking also stimulates the redistribution of receptors on the cell surface, a process that can be observed by labeling the anti-IgE with 15 nm protein A-gold particles as described in Stump et al. (1989), followed by back-scattered electron imaging (BEI) in the scanning electron microscope. We report that anti-IgE binding stimulates the redistribution of IgE-receptor complexes at 37“C from a dispersed topography (singlets and doublets; S/D) to distributions dominated sequentially by short chains, small clusters and large aggregates of crosslinked receptors. These patterns can be observed (Figure 1), quantified (Figure 2) and analyzed statistically. Cells incubated with 1 μg/ml anti-IgE, a concentration that stimulates maximum net secretion, redistribute receptors as far as chains and small clusters during a 15 min incubation period. At 3 and 10 μg/ml anti-IgE, net secretion is reduced and the majority of receptors redistribute rapidly into clusters and large aggregates.

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