scholarly journals EVALUATION OF THE FOURTH VENTRICLES OF ADULTS IN NORTH-EASTERN NIGERIANS USING COMPUTERIZE TOMOGRAPHIC IMAGES

2020 ◽  
Vol 14 (2) ◽  
pp. 140-146
Author(s):  
Amaza DS ◽  
◽  
Zirahei JV ◽  
Sambo N ◽  
Oyewale AA ◽  
...  
Keyword(s):  
Sex Determination ◽  
Fourth Ventricle ◽  
Age Groups ◽  
Ct Images ◽  
Sample Population ◽  
Neurosurgical Procedures ◽  
Brain Disorders ◽  
Brain Ct ◽  
North Eastern ◽  
Males And Females

Background: Knowledge of anatomy of the fourth ventricle and the structures around it, is significant in sex determination, surgical operations and brain disorders. Accurate measurements of the fourth ventricle are needful in evaluating brain disorders and in decision making before any neurosurgical procedures. Objective: To determine the dimensions of the apparently normal fourth ventricles and compare the parameters among males and females with a view to providing baseline data. Method: Retrospective study was carried out on brain CT images. Six hundred (600) brain CT images of adult North-eastern Nigerians (350 males and 250 females) were measured. The age range for the individuals was 18-75years. The brain CT images for males and females were classified separately into six (6) age groups spanned eight (8) years interval. Measurements were done using Dicomworks software. The software provides a meter rule with which measurements were done, based on a standard method. Greatest height of fourth ventricle was measured from the roof and floor of the fourth ventricle while the width measured at the midpoint of the ventricle. Results: The height of the fourth ventricle was larger in males (9.95 mm ± 1.04) as compared to females (8.38 mm ± 1.69). The width of the fourth ventricle was also observed to be greater in males (12.95 mm ±1.29) than in females (11.67 mm ±1.45). Thus, the difference between the lengths and widths of the fourth ventricles were higher and statistically significant (p<0.05) among males and females. Conclusion: The present study concludes that the parameters of the 4th ventricle measured were sexually dimorphic and can be used in sex determination in the sample population. This study also has provided reference point for the normal values of the length and width of the fourth ventricle in male and female Nigerians.

Projected future risk of leukemia and brain tumors from unnecessary brain CT scans: a multi-center study in Iran

2020 ◽  
Author(s):  
A. Asgari ◽  
A.A. Parach ◽  
F. Bouzarjomehri ◽  
F. Shirani-Takabi ◽  
A.H. Mehrparvar ◽  
...  
Keyword(s):  
Brain Cancer ◽  
Age Groups ◽  
Young Patients ◽  
Ct Scans ◽  
Brain Ct ◽  
Males And Females ◽  
And Gender ◽  
Multi Center Study ◽  
Gender Groups ◽  
Probability Of Cancer

Introduction: Computer Tomography (CT) scans can deliver a relatively high radiation dose to the patient, therefore radiation protection for this modality is paramount. The present study determined the frequency of no abnormality detected (NAD) brain CT scans and probability of cancer induction in different age groups and genders. Methods: In this study, brain CT reports were used to identify any findings as abnormality detected (AD) and others as NAD. Then probability of future leukemia and brain cancer was estimated for different age and gender groups. Results: On average, in 65% of the cases the results were NAD (56% and 76% among males and females, respectively). Among children, 79% of the reports were NAD. The total number of projected brain cancers was 1.8 and 1.3 for males and females, respectively. The number of projected leukemia cases was 0.75 and 0.7 for males and females, respectively. For pediatric patients, brain CT scans can lead to leukemia cases about 4.5 times more often than adults. Conclusion: Brain CT scans can lead to additional cases of brain cancer and leukemia. A significant fraction of brain CTs were NAD (non-pathologic) and could practically be replaced by other radiation-free imaging modalities, especially in pediatric and young patients.

Age Identification: A Comparison between Finnish and North-American Cultures

1998 ◽  
Vol 46 (2) ◽  
pp. 109-124 ◽  
Author(s):  
Virpi Uotinen
Keyword(s):  
Cultural Differences ◽  
North American ◽  
Age Groups ◽  
Chronological Age ◽  
Subjective Age ◽  
Age Identity ◽  
American Sample ◽  
North Eastern ◽  
Males And Females ◽  
North American Sample

This study examined perceptions of age among Finnish males and females in three age groups; twenty-five to thirty-nine-year-olds ( n = 446), forty to fifty-four-year-olds ( n = 482) and fifty-five to sixty-four-year-olds ( n = 427). The age perceptions of the Finnish sample were further compared with those of a North-American sample with corresponding age groups ( n = 169, n = 187, n = 222) reported by Barak, Stern, and Gould (1988). Four age concepts used were chronological age, subjective age, ideal age, and disparity age. As expected on the basis of previous studies in age identification, no difference was found between Finnish males and females in terms of subjective age. Ideal age, however, differentiated Finnish males and females; the age ideal of females was significantly higher when compared with males with respective chronological ages. The comparison between Finnish and North-Eastern U.S. sample indicated that the latter group had more youthful age identity while the Finns expressed a greater acceptance of their present age status. This was seen in higher subjective and ideal ages of Finns when compared with their North-American counterparts. Socio-cultural differences in terms of meanings associated with chronological age and aging are discussed.

scholarly journals Morphometric evaluations of intercondylar distances using computed tomographic scan images in Maiduguri, northeastern Nigeria

2019 ◽  
Vol 8 (2) ◽  
pp. 1519-1522
Author(s):  
J.V. Zirahei ◽  
D.S. Amaza ◽  
H.Y. Mailabari ◽  
H Buba ◽  
Ali A. Mado
Keyword(s):  
Sex Determination ◽  
Occipital Condyle ◽  
Sample Population ◽  
Mean Values ◽  
Computed Tomographic ◽  
Computed Tomographic Scan ◽  
Different Populations ◽  
Males And Females ◽  
Intercondylar Distance ◽  
Surgical Operations

Knowledge of the anatomy of the occipital condyle (OC) and the structures around it is significant in sex determination and in surgical operations involving the basicranium. The present study attempts to evaluate the anterior occipital intercondylar distance (AOID) and posterior occipital intercondylar distance (POID) in the sample population as well as its variability in different populations. The sample population for the present study comprised of computed tomographic (CT) images of 110 patients (60 males and 50 females) aged 18–65 years obtained from the Federal Neuropsychiatric Hospital, Maiduguri, Borno State-Nigeria. Males presented significantly higher mean values for both the parameters measured (p<0.001). Mean values of AOID in males and females are respectively 24.15 mm and 22.31 mm, while the POID mean values are 26.83 mm and 23.79 mm. The ratio of POID to AOID is 1.1:1.0 in both males and females in the sample. This ratio varies from population to population.

Size-At-Age Variability and Sexual Dimorphism of Morphometric Characteristics in the Late Ontogenesis of the Marsh Frog, Pelophylax Ridibundus (Anura, Ranidae), from Terrytory of Crimea

2019 ◽  
Vol 53 (4) ◽  
pp. 325-334
Author(s):  
V. N. Peskov ◽  
N. A. Petrenko ◽  
V. Yu. Reminnyi
Keyword(s):  
Age Groups ◽  
The Body ◽  
Adult Males ◽  
Morphometric Characteristics ◽  
Morphometric Characters ◽  
Mean Values ◽  
Marsh Frog ◽  
Males And Females ◽  
Size At Age ◽  
Linear Body

Abstract We study size-at-age and sexual variability of morphometric characteristics of the marsh frog. According to the size of the body, males were divided into three size-age groups (juvenis, subadultus, adultus), females — into four groups (juvenis, subadultus, adultus, adultus-I). We found that the chronological age of frogs (skeletochronology) does not always correspond to their biological age (size and proportions of the body). We noted that the semi-adult males are reliably larger than females by mean values of 26 studied morphometric characters. Males and females of “adultus” group do not differ by linear body size, significant differences were found in body proportions (7 characters). For the females of “adultus-I” group, the mean values of 26 characters are significantly larger than for “adultus” males. The results of our study showed that with the age of the marsh frog, the level of exhibition, directionality and structure of morphometric sex differences changes.

AVALIAÇÃO DO CONHECIMENTO TRADICIONAL DOS PESCADORES DA RDSM APLICADO À IDENTIFICAÇÃO DO SEXO DE PIRARUCUS

2010 ◽  
Vol 5 (2) ◽  
pp. 59-66
Author(s):  
Kelven Lopes ◽  
Helder Lima de Queiroz
Keyword(s):  
Sex Determination ◽  
Traditional Knowledge ◽  
Structured Interviews ◽  
Sustainable Fisheries ◽  
Arapaima Gigas ◽  
Males And Females

This study examined the traditional knowledge of fishermen at Mamirauá Reserve about sex determination of pirarucus, Arapaima gigas Schinz 1822. We evaluated the criteria used for by fishermen in the sector Jarauá at Mamirauá Reserve for this determination, during the fisheries season, from October to November 2004. We analyzed responses of a group of about 15 fishermen collected in structured interviews regarding 109 individual pirarucus, 65 males and 44 females. From this sample, only 64 fish have their sex correctly predicted by the fishermen. Although the traditional knowledge of local fishermen is a key component of the sustainable fisheries of this species, this knowledge is not functional in all ranges and aspects, as in sex distinction. We found that the local fishermen evaluated are not able to recognize the sex of pirarucus, although some criteria applied for this purpose are consistent with their biology. The rates of correct forecasts for recognition of males and females were similar to those obtained by chance, even when the criteria applied were consistent, as the criterion “coloration”, which was significantly consistent for identification of males. Yet the group of fishermen interviewed in this study apparently did not apply this criterion correctly.

scholarly journals Older Adults and Technology Use: A Systematic Literature Review

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 823-823
Author(s):  
Hyung Wook Choi ◽  
Rose Ann DiMaria-Ghalili ◽  
Mat Kelly ◽  
Alexander Poole ◽  
Erjia Yan ◽  
...  
Keyword(s):  
Older Adults ◽  
Technology Use ◽  
Age Groups ◽  
Well Being ◽  
Sample Population ◽  
Age Cohorts ◽  
Fine Grained ◽  
Nuanced Understanding ◽  
Smart Technologies ◽  
Age Range

Abstract Researchers are increasingly interested in leveraging technology to support the physical and mental well-being of older adults. We systematically reviewed previous scholars’ criteria for sampling older adult populations, focusing on age cohorts (namely adults over 65) and their use of internet and smart technologies. We iteratively developed keyword combinations that represent older adults and technology from the retrieved literature. Between 2011 and 2020, 70 systematic reviews were identified, 26 of which met our inclusion criteria for full review. Most important, not one of the 26 papers used a sample population classification more fine-grained than “65 and older.” A knowledge gap thus exists; researchers lack a nuanced understanding of differences within this extraordinarily broad age-range. Demographics that we propose to analyze empirically include not only finer measures of age (e.g., 65-70 or 71-75, as opposed to “65 and older”), but also those age groups’ attitudes toward and capacity for technology use.

scholarly journals Comparison of Prevalence of Periodontitis with Different Indices in Population of District Ghaziabad

2016 ◽  
Vol 04 (01) ◽  
pp. 023-030
Author(s):  
Vimal Kumar ◽  
Pallak Arora ◽  
Manish Khatri ◽  
Shivani Sharma ◽  
Sumit Malhotra ◽  
...  
Keyword(s):  
Periodontal Disease ◽  
Total Population ◽  
Age Groups ◽  
Cross Sectional Study ◽  
Sample Population ◽  
Age Group ◽  
Cross Sectional ◽  
Multi Stage ◽  
Younger Age ◽  
Study Population

Abstract Objective: To estimate the prevalence of periodontal disease with different indices. Methods & materials: The study population consisted of multistage stratified random sample of 1300 subjects from total population of district Ghaziabad. A cross-sectional study was conducted with multi stage stratified random sampling techniques to select the sample population. The subjects were divided into different age groups and the periodontal assessment was made on the basis of CPITN index and ESI Index. Results: The CPITN has shown to estimate incorrect periodontal disease prevalence because of its underestimation of the disease severity. A huge difference was noticed in the prevalence rate of periodontitis when subjects were examined with ESI index. Conclusion Periodontal disease was found to be highly prevalent in the study population and severity of disease increased with age. More number of subjects in younger age group were found to be healthy.

AGE-BASED VARIATIONS OF FRACTAL STRUCTURE OF EEG SIGNAL IN PATIENTS WITH EPILEPSY

Fractals ◽  
2018 ◽  
Vol 26 (04) ◽  
pp. 1850051 ◽  
Author(s):  
HAMIDREZA NAMAZI ◽  
SAJAD JAFARI
Keyword(s):  
Fractal Dimension ◽  
Brain Research ◽  
Age Groups ◽  
Eeg Signal ◽  
Brain Disorders ◽  
Eeg Signals ◽  
Important Challenge ◽  
Patients With Epilepsy ◽  
Process Complexity ◽  
Electroencephalogram Eeg

It is known that aging affects neuroplasticity. On the other hand, neuroplasticity can be studied by analyzing the electroencephalogram (EEG) signal. An important challenge in brain research is to study the variations of neuroplasticity during aging for patients suffering from epilepsy. This study investigates the variations of the complexity of EEG signal during aging for patients with epilepsy. For this purpose, we employed fractal dimension as an indicator of process complexity. We classified the subjects in different age groups and computed the fractal dimension of their EEG signals. Our investigations showed that as patients get older, their EEG signal will be more complex. The method of investigation that has been used in this study can be further employed to study the variations of EEG signal in case of other brain disorders during aging.

Automatic recognition of midline shift on brain CT images

2010 ◽  
Vol 40 (3) ◽  
pp. 331-339 ◽  
Author(s):  
Chun-Chih Liao ◽  
Furen Xiao ◽  
Jau-Min Wong ◽  
I-Jen Chiang
Keyword(s):  
Ct Images ◽  
Automatic Recognition ◽  
Midline Shift ◽  
Brain Ct

Internal versus External Locus of Control for Three Age Groups

1974 ◽  
Vol 5 (1) ◽  
pp. 7-10 ◽  
Author(s):  
Sara Staats
Keyword(s):  
Locus Of Control ◽  
Age Groups ◽  
External Locus ◽  
Internal Locus ◽  
Internal Locus Of Control ◽  
College Population ◽  
Males And Females ◽  
External Locus Of Control

Rotter's I-E Scale was administered to a non-college population of males and females in 3 age groups: 5–15, 16–25, and 46–60. Internal locus of control expectations increased with age. A trend for males to be more internal in their beliefs was suggested.

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