scholarly journals Morphometric analysis of variation in the ribs with age and sex

2014 ◽  
Vol 225 (2) ◽  
pp. 246-261 ◽  
Author(s):  
Ashley A. Weaver ◽  
Samantha L. Schoell ◽  
Joel D. Stitzel
Keyword(s):  
Morphometric Analysis ◽  
Analysis Of Variation ◽  
Age And Sex

Morphological and morphometric analysis of variation in the Zhoukoudian Homo erectus brain endocasts

2010 ◽  
Vol 211 (1-2) ◽  
pp. 4-13 ◽  
Author(s):  
Xiujie Wu ◽  
Lynne A. Schepartz ◽  
Christopher J. Norton
Keyword(s):  
Morphometric Analysis ◽  
Homo Erectus ◽  
Analysis Of Variation

scholarly journals 3D geometric morphometric analysis of variation in the human lumbar spine

2019 ◽  
Vol 170 (3) ◽  
pp. 361-372 ◽  
Author(s):  
Stephanie Lois Zlolniski ◽  
Nicole Torres‐Tamayo ◽  
Daniel García‐Martínez ◽  
Esther Blanco‐Pérez ◽  
Federico Mata‐Escolano ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Morphometric Analysis ◽  
Geometric Morphometric ◽  
Human Lumbar Spine ◽  
Geometric Morphometric Analysis ◽  
Analysis Of Variation

Morphometric analysis of variation in the 'Epacris tasmanica complex' (Epacidaceae)

1990 ◽  
Vol 3 (2) ◽  
pp. 253 ◽  
Author(s):  
RK Crowden ◽  
Y Menadue
Keyword(s):  
New Species ◽  
Morphometric Analysis ◽  
Identification Keys ◽  
The Status ◽  
Analysis Of Variation ◽  
One New Species

Ten taxa related to Epacris tasmanica W.M. Curtis (the 'Epacris tasmanica complex') were difficult to separate using available identification keys. Morphopmetric analysis was used to examine the relationships within these taxa. It showed that E. tasmanica s.l. comprised two species, E. tasmanica s. str. and E. virgata. The status of four other existing species is maintained and one new species is confirmed, while the two remaining taxa require further examination.

A Three-Dimensional-Based Morphometric Analysis of a Standardized Overcorrection Technique for Fronto-Orbital Advancement in Metopic Craniosynostosis

2021 ◽  
pp. 105566562110628
Author(s):  
Miles J. Pfaff ◽  
Madeleine K. Bruce ◽  
Sarah Erpenbeck ◽  
Aditya Mittal ◽  
Justin W. Beiriger ◽  
...  
Keyword(s):  
Morphometric Analysis ◽  
Three Dimensional ◽  
Ct Scans ◽  
Computed Tomographic ◽  
Metopic Synostosis ◽  
Long Term Follow Up ◽  
Z Scores ◽  
3D Photogrammetry ◽  
Age And Sex

Introduction The concept of “overcorrection” for trigonocephaly has been reported to achieve both anterior cranial fossa expansion and normalization of craniofacial form. The purpose of this study is to describe in detail a standardized technique to fronto-orbital advancement utilizing the concept of “overcorrection” and objectively evaluate intermediate results. Methods This retrospective study included patients with isolated metopic synostosis who underwent surgery via the proposed surgical technique and age and sex-matched unaffected controls. Craniofacial morphometric analysis was performed on pre-, immediate post-, and intermediate postoperative (>2 years) three-dimensional (3D)-rendered computed tomographic (CT) scans and photographs. Key CT-based measurements included interzygomaticofrontal suture distance (IZFS), endocranial bifrontal angle (ECA), and temporal expansion. 3D photogrammetry was performed using established measurements and associated Z-scores converted. A Paired t-test and analysis of variance were performed when appropriate. Results Forty-one patients were included. A comparison of pre- and immediate postoperative CT scans demonstrated statistically significant increases in all measurements. Subset analysis of 12 patients with intermediate follow-up (age: 39.6 ± 3.6 months) demonstrated significant differences from preoperative values except for IZFS, which decreased from immediate postoperative values and was smaller than age- and sex-matched controls. 3D photogrammetry demonstrated a mean Z-score above the norm for frontal breath. 3D photogrammetry is also positively correlated with CT-based measurements. Conclusions This standardized “overcorrection” approach for trigonocephaly can provide the appropriate changes to maintain a normal ECA despite a reduction in bifrontal width over time. 3D photogrammetry positively correlated with CT-based measurements and may provide useful information when following patients clinically. Long-term follow-up assessment to determine the necessary degree of overcorrection at skeletal mature is needed.

Morphometric analysis of variation in the sternum with sex and age

2014 ◽  
Vol 275 (11) ◽  
pp. 1284-1299 ◽  
Author(s):  
Ashley A. Weaver ◽  
Samantha L. Schoell ◽  
Callistus M. Nguyen ◽  
Sarah K. Lynch ◽  
Joel D. Stitzel
Keyword(s):  
Morphometric Analysis ◽  
Analysis Of Variation

Morphometric Analysis of the Hepatocytes from Fish Exposed to Arsenic

1976 ◽  
Vol 34 ◽  
pp. 282-283
Author(s):  
Elsie M. B. Sorensen
Keyword(s):  
Morphometric Analysis ◽  
Arsenic Concentration ◽  
Ultrastructural Changes ◽  
Sodium Arsenate ◽  
Lepomis Cyanellus ◽  
Mammalian Counterpart ◽  
Intracellular Changes ◽  
Green Sunfish ◽  
Organic Pesticides

The detoxification capacity of the liver is well documented for a variety of substances including ethanol, organic pesticides, drugs, and metals. The piscean liver, although less enzymatically active than the mammalian counterpart (1), contains endoplasmic reticulum with an impressive repertoire of oxidizing, reducing, and conjugating abilities (2). Histopathologic changes are kncwn to occur in fish hepatocytes following in vivo exposure to arsenic (3); however, ultrastructural changes have not been reported. This study involved the morphometric analysis of intracellular changes in fish parynchymal hepatocytes and correlation with arsenic concentration in the liver.Green sunfish (Lepomis cyanellus, R.) were exposed to 0, 30, or 60 ppm arsenic (as sodium arsenate) at 20°C for 1, 2, or 3 week intervals before removal of livers for quantification of the arsenic burden (using neutron activation analysis) and morphometric analysis of ultrastructural alterations. Livers were cut into 1 mm cubes for fixation, dehydration, and embedding.

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