Annals of Anatomy-Anatomischer Anzeiger最新文献

{"title":"The three-dimensional analysis of gustatory papillae and its taste buds on the tongue of the wild-living hare (Lepus europaeus), European rabbit (Oryctolagus cuniculus), and domestic rabbit (Oryctolagus cuniculus f. domestica)","authors":"Barbara Plewa ,&nbsp;Hanna Jackowiak","doi":"10.1016/j.aanat.2025.152667","DOIUrl":"10.1016/j.aanat.2025.152667","url":null,"abstract":"<div><div>Correlative light microscopy (LM), scanning electron microscopy (SEM), and three-dimensional (3D) analysis in two wild-living species, i.e. hare and European rabbit, and domesticated rabbit, provide the first microstructural characteristics of fungiform papillae (Fu’s), vallate papillae (Vp), and foliate papillae (Fo). The 3D reconstruction method of 2D histosections revealed types of internal connective tissue cores (CTCs) and allowed visualisation of spatial distribution and number of taste buds (Tbs). By the almost even morphology of Fu, in the wild-living lagomorphs, CTCs were columnar- or ballon-like, while in the domestic rabbit, balloon-like. CTCs of Vp were flower-like with some species variation. The Fo displayed the structure of three collagenous laminae across all species. 3D models of papillae revealed the species-specific traits in the distribution of Tbs in rows, stripes or kinds of dispersion. Quantitative data showed that in the wild-living lagomorphs, there was a higher number of Tbs on the ventral surface of the apex, the area of first contact with food, and its preselection. Among the species studied, the hare exhibited the highest number of Tbs in Vp and Fo, while within rabbits, domestic rabbits had more Tbs than their wild counterparts. Notably, the posterior part of the tongue, containing approximately 96 % of total Tbs, reflects the importance of intensive taste perception during chewing. The total number of Tb estimated in gustatory papillae in hares was 17,509, whereas in domestic and European rabbits was approximately 25 % and 43 % lower, respectively. Our finding contrasts with 3D analyses conducted previously on wild-living and domesticated ruminant herbivores.</div></div>","PeriodicalId":50974,"journal":{"name":"Annals of Anatomy-Anatomischer Anzeiger","volume":"260 ","pages":"Article 152667"},"PeriodicalIF":2.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TNF-α antagonist alleviates muscular layer enlargement but does not prevent myenteric neuronal loss in the colon of streptozotocin-induced diabetic rats","authors":"Tri Agusti Sholikah ,&nbsp;Dian Eurike Septyaningtrias ,&nbsp;Yustina Andwi Ari Sumiwi ,&nbsp;Muthmainah Muthmainah ,&nbsp;Jens Randell Nyengaard ,&nbsp;Rina Susilowati","doi":"10.1016/j.aanat.2025.152666","DOIUrl":"10.1016/j.aanat.2025.152666","url":null,"abstract":"<div><h3>Background</h3><div>this study aimed to examine the impact of a TNF-α antagonist on markers of neuronal death, the total number of myenteric neurons, and the volume of each colonic layer in diabetic rats.</div></div><div><h3>Methods</h3><div>thirty male rats were divided into normal control (NC), diabetic control (DC), and diabetic etanercept (DE) groups. Diabetes was induced using streptozotocin and nicotinamide. The DE group received twice-weekly injections of etanercept. Immunohistochemistry staining and western blotting detected activated caspase-3, Gasdermin D, and phosphorylated-MLKL. Stereological methods were performed in colon sections stained with Toluidine-blue to estimate the total number of neurons in the colonic myenteric plexus and the colonic layer volume.</div></div><div><h3>Results</h3><div>immunohistochemistry showed etanercept reduced expression of apoptosis and pyroptosis markers, but not necroptosis, in the myenteric plexus of the colon in diabetic rats. Diabetic rats exhibited a lower total number of neurons in the colonic myenteric ganglions, and etanercept did not prevent this neuronal loss. Furthermore, colonic layer enlargement was observed in diabetic rats, with only the muscular layer hypertrophy being prevented by etanercept administration.</div></div><div><h3>Conclusions</h3><div>the TNF-α antagonist did not prevent neuronal loss in the colonic myenteric plexus; it partially inhibited colonic muscular layer enlargement in diabetic rats.</div></div>","PeriodicalId":50974,"journal":{"name":"Annals of Anatomy-Anatomischer Anzeiger","volume":"260 ","pages":"Article 152666"},"PeriodicalIF":2.0,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Meningeal architecture of Meckel’s Cave and its surgical implications: A study using epoxy sheet plastination and three-dimensional reconstruction","authors":"Liu Xu ,&nbsp;Juan Jin ,&nbsp;ZhengZheng Sun ,&nbsp;Yao Zuo ,&nbsp;Yan Kong ,&nbsp;Xiao Wu ,&nbsp;Liang Liang ,&nbsp;Shengchun Xu ,&nbsp;Zhaoyang Xu","doi":"10.1016/j.aanat.2025.152664","DOIUrl":"10.1016/j.aanat.2025.152664","url":null,"abstract":"<div><h3>Background</h3><div>The architecture of Meckel’s Cave (MC) dural walls and their associations with neighboring structures remain subjects of debate. Few studies have explored the thickness of the MC dural walls. The primary aim of this study was to elucidate the detailed meningeal architecture of MC and its relationship with the internal carotid artery, using sheet plastination technology to analyze the potential spreading pathways of tumors through the medial wall.</div></div><div><h3>Methods</h3><div>Ultrathin plastinated slices were prepared and examined in coronal, sagittal, and transverse planes. Three-dimensional reconstructions were generated to analyze the composition of MC’s dural walls and their association with the trigeminal ganglion (TG), its nerve roots and branches, and the alignment of the internal carotid artery (ICA). Particular attention was given to the medial wall of MC and the variations in ICA trajectories.</div></div><div><h3>Results</h3><div>The study identified distinct regions within MC, highlighting the composition of the superolateral, medial, and inferior walls. The arachnoid mater was shown to enclose the trigeminal rootlets and contribute to the formation of the perineurium in motor roots. Four different ICA trajectories in relation to the medial wall were classified, each influencing the configuration of the quadrangular space. These variations were found to have implications for surgical planning, particularly in endoscopic endonasal approaches. The study also demonstrated key differences in the structural relationships affecting invasive tumor growth pathways.</div></div><div><h3>Conclusions</h3><div>The findings of this study provide new insights into the microanatomy of MC and its relationships with the TG and ICA. These results offer a foundational basis for surgical planning and may help refine strategies for accessing lesions in this complex anatomical region.</div></div>","PeriodicalId":50974,"journal":{"name":"Annals of Anatomy-Anatomischer Anzeiger","volume":"260 ","pages":"Article 152664"},"PeriodicalIF":2.0,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spike protein-related proteinopathies: A focus on the neurological side of spikeopathies","authors":"Andreas Posa","doi":"10.1016/j.aanat.2025.152662","DOIUrl":"10.1016/j.aanat.2025.152662","url":null,"abstract":"<div><h3>Background</h3><div>The spike protein (SP) is an outward-projecting transmembrane glycoprotein on viral surfaces. SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2), responsible for COVID-19 (Coronavirus Disease 2019), uses SP to infect cells that express angiotensin converting enzyme 2 (ACE2) on their membrane. Remarkably, SP has the ability to cross the blood-brain barrier (BBB) into the brain and cause cerebral damage through various pathomechanisms. To combat the COVID-19 pandemic, novel gene-based products have been used worldwide to induce human body cells to produce SP to stimulate the immune system. This artificial SP also has a harmful effect on the human nervous system.</div></div><div><h3>Study design</h3><div>Narrative review.</div></div><div><h3>Objective</h3><div>This narrative review presents the crucial role of SP in neurological complaints after SARS-CoV-2 infection, but also of SP derived from novel gene-based anti-SARS-CoV-2 products (ASP).</div></div><div><h3>Methods</h3><div>Literature searches using broad terms such as \"SARS-CoV-2\", \"spike protein\", \"COVID-19\", \"COVID-19 pandemic\", \"vaccines\", \"COVID-19 vaccines\", \"post-vaccination syndrome\", \"post-COVID-19 vaccination syndrome\" and \"proteinopathy\" were performed using PubMed. Google Scholar was used to search for topic-specific full-text keywords.</div></div><div><h3>Conclusions</h3><div>The toxic properties of SP presented in this review provide a good explanation for many of the neurological symptoms following SARS-CoV-2 infection and after injection of SP-producing ASP. Both SP entities (from infection and injection) interfere, among others, with ACE2 and act on different cells, tissues and organs. Both SPs are able to cross the BBB and can trigger acute and chronic neurological complaints. Such SP-associated pathologies (spikeopathies) are further neurological proteinopathies with thrombogenic, neurotoxic, neuroinflammatory and neurodegenerative potential for the human nervous system, particularly the central nervous system. The potential neurotoxicity of SP from ASP needs to be critically examined, as ASPs have been administered to millions of people worldwide.</div></div>","PeriodicalId":50974,"journal":{"name":"Annals of Anatomy-Anatomischer Anzeiger","volume":"260 ","pages":"Article 152662"},"PeriodicalIF":2.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the relationship of navicular tuberosity and tibialis posterior tendon with medial longitudinal arch","authors":"Turan Koç ,&nbsp;Alev Bobuş Örs ,&nbsp;Zeliha Kurtoğlu Olgunus ,&nbsp;Asena Ayça Özdemi̇r","doi":"10.1016/j.aanat.2025.152663","DOIUrl":"10.1016/j.aanat.2025.152663","url":null,"abstract":"<div><h3>Background</h3><div>Although it is suggested that the morphometry of the medial protrusion of tuberosity of navicular bone (TNm) and tibialis posterior (TP) tendons is related to this pathology, there is insufficient evidence. This study aimed to reveal the relations of the medial longitudinal arch (MLA) with the tendons of the TP and the TNm.</div></div><div><h3>Materials and methods</h3><div>Dissections of this study were performed on the dorsal and plantar aspects of 34 formalin-fixed cadavers and amputated feet (15 female, 19 male). All attachment sites and connections of the main TP (TPmt) and slips are evaluated and classified. Morphometric measurements of TNm and all tendon slips were performed. Feet were assessed for pes planus (PP) presence using the navicular index and the first metatarsal-calcaneus angle and grouped as normal and pathological (pes planus). For all parameters, differences between groups, genders, and sides were evaluated.</div></div><div><h3>Results</h3><div>The TP attached to the calcaneus, navicular, medial and lateral cuneiform, cuboid and fourth metatarsal bone (MT₄) in all feet. Additionally, slips were attached to the other tarsal and metatarsal bones (MT) with different combinations. The bony prominence exceeded the determined surgical reference line medially (6.73 ± 2.96 mm) in all feet. The width and length of the medially protruding part of TN revealed that it did not cause any disruption on the morphometry (cross-sectional areas) of TPmt and its slips. No significant difference was found between the normal and pathological groups according to the classification criteria regarding tendon types, number of muscle attachments, slips and morphometry of the TNm. However, it was determined that the cross-sectional area and thickness of the tendon connecting to the MT₄ and thickness of the tendon connecting to the MT₅ were greater in the pes planus group (PP).</div></div><div><h3>Conclusion</h3><div>There was no evidence that TNm morphometry affects tendon distribution or facilitates PP in the arch of the foot. Our data indicates that the tendon extension dimensions of the muscle attached to MT₄ and MT₅ change depending on PP.</div></div>","PeriodicalId":50974,"journal":{"name":"Annals of Anatomy-Anatomischer Anzeiger","volume":"260 ","pages":"Article 152663"},"PeriodicalIF":2.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Histological characterization and spatial profiling of age-induced tertiary lymphoid structures in mouse lung parenchyma","authors":"R. Ciccimarra ,&nbsp;M. Zoboli ,&nbsp;L. Ragionieri ,&nbsp;A. Cacchioli ,&nbsp;F. Gazza ,&nbsp;R. Saleri ,&nbsp;F.F. Stellari ,&nbsp;F. Ravanetti","doi":"10.1016/j.aanat.2025.152660","DOIUrl":"10.1016/j.aanat.2025.152660","url":null,"abstract":"<div><div>Tertiary lymphoid structures are ectopic lymphoid aggregates traditionally associated with inflammation or injury. Their presence in uninjured, aged murine lungs remains unexplored. This study investigates age-induced TLS formation, morphology and cellular composition, comparing these structures to those induced by bleomycin treatment. Lungs from healthy mice aged two, 18, and 24 months were analyzed using histological staining, histomorphometry and high-plex immunofluorescence. TLSs were identified and spatially classified (perivascular, peribronchial, parenchymal).</div><div>We performed a single-cell phenotype analysis that revealed distinctive alterations in the immune repertoire identifying lymphoid neogenesis in healthy elderly lungs. BLM-induced TLSs in young (2-month-old) mice were also examined.</div><div>Age-related TLS formation was evident, with a significant increase in both density and size at 18 and 24 months compared to two months. Peribronchial TLSs were larger and more circular with age, while perivascular TLSs showed higher T cell density. Immunofluorescence revealed diverse immune cell populations, including B cells, T cells and macrophages, organized in location-specific patterns. BLM-induced TLSs were larger and less compact than those in aged lungs, correlating with fibrotic severity (R² = 0,92).</div><div>This study reveals that TLSs develop in murine lungs with age, exhibiting distinct spatial organization and immune cell compositions. Compared to damage-induced TLSs, age-related TLSs are more compact and structured. These findings highlight the role of TLSs in age-related immune surveillance and suggest their potential involvement in inflammaging and chronic lung conditions. It will be crucial to further investigate their role and determine whether their formation is associated with respiratory disease and age-related immune dynamics.</div></div>","PeriodicalId":50974,"journal":{"name":"Annals of Anatomy-Anatomischer Anzeiger","volume":"260 ","pages":"Article 152660"},"PeriodicalIF":2.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical anatomy of the inferior gluteal nerve - systematic review and meta-analysis","authors":"Jonasz Tempski ,&nbsp;Grzegorz Fibiger ,&nbsp;Katarzyna Majka ,&nbsp;Jakub Pękala ,&nbsp;Dominik Łazarz ,&nbsp;Konrad Malinowski ,&nbsp;Jerzy A. Walocha ,&nbsp;Przemysław Pękala","doi":"10.1016/j.aanat.2025.152661","DOIUrl":"10.1016/j.aanat.2025.152661","url":null,"abstract":"<div><h3>Background</h3><div>The variations and patterns presented by inferior gluteal nerve (IGN) have been linked to iatrogenic complications, particularly in pelvic operations. The aim of this meta-analysis was to obtain data regarding IGN morphometry, communication and relationship with nervous structures of the gluteal area, course, pattern and muscle innervation.</div></div><div><h3>Methods</h3><div>A large-scale search was conducted (PubMed, Embase, Science Direct and Web of Science) with no restrictions on date or language. Included categories involved prevalence, course, patterns, origin and distances from respective anatomical landmarks.</div></div><div><h3>Results</h3><div>A total of 20 studies (n = 1235 hemipelves) were incorporated into our publication.</div><div>The distance between the main branch of IGN and the greater trochanter was 70.2 mm (95 %CI:37.9–102.5). In the mid-gluteal region, the nerve was 22.6 mm (95 %CI:11.3–33.8) away from the ischial spine.</div><div>Moreover, for this study’s purpose we distinguished seven morphological IGN variants, which presented different courses in regard to the piriformis muscle. The most common was type I, in which IGN went under the piriformis muscle and its prevalence equaled 90.6 % (95 %CI:83.2–98.4;p &lt; 0.001).</div></div><div><h3>Conclusion</h3><div>Clinicians, particularly those performing hip surgeries, should be aware of the potential variations of IGN and their associated challenges, as such knowledge can help mitigate the risk of injury to this structure. The IGN’s close proximity to the greater trochanter plays a crucial role in the posterior approach to the hip, as it could be used as a landmark to help prevent iatrogenic damage during this procedure.</div></div>","PeriodicalId":50974,"journal":{"name":"Annals of Anatomy-Anatomischer Anzeiger","volume":"260 ","pages":"Article 152661"},"PeriodicalIF":2.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intersaphenous veins of the leg: An ultrasonographic study in young population","authors":"Michaela Veselá ,&nbsp;Gabriela Dostálová ,&nbsp;Karel Brabec ,&nbsp;Aleš Linhart ,&nbsp;David Kachlík","doi":"10.1016/j.aanat.2025.152658","DOIUrl":"10.1016/j.aanat.2025.152658","url":null,"abstract":"<div><h3>Introduction</h3><div>The communicating veins between the great and small saphenous veins, called intersaphenous veins, are often overlooked structures, except for the femoral intersaphenous vein (of Giacomini). The reason for tendency to neglect the crural intersaphenous veins can be their alleged high variability. The aim of the study was to bring reliable anatomical and morphometric data about the crural intersaphenous veins for their potential clinical usage as grafts.</div></div><div><h3>Material and Methods</h3><div>In this ultrasonographic study performed on a young population, we screened 246 lower extremities. The incidence of the femoral intersaphenous vein was 51.2 % (126/246) and the incidence of at least one crural intersaphenous vein was 97.1 % (239/246). Two crural intersaphenous veins were observed in 46.7 % (115/246).</div></div><div><h3>Results</h3><div>The femoral intersaphenous vein was located exclusively on the thigh, with its average length of 26.35 cm and average calibre of 2.4 mm. The typical area where to find a crural intersaphenous vein is the middle medial part of the calf. Their course can be straight transverse, oblique or they can rarely make a plexus. The majority of intersaphenous veins of the leg do not possess valves, if so, those are parietal valves present in 10.3 % (39/379). An average length of 13.7 cm and an average calibre of 2.13 mm of intersaphenous veins of the leg are appropriate enough for their usage as a venous graft or in reconstruction surgery.</div></div><div><h3>Conclusion</h3><div>The intersaphenous veins of the leg are not as variable as presented in previous studies. Their anatomical and topographical characteristics are fairly constant. According to their anatomical characteristics, crural intersaphenous veins could be surgically used as a suitable variant to the great saphenous vein, small saphenous vein and femoral intersaphenous vein.</div></div>","PeriodicalId":50974,"journal":{"name":"Annals of Anatomy-Anatomischer Anzeiger","volume":"260 ","pages":"Article 152658"},"PeriodicalIF":2.0,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143744628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The innominate tributary of the small saphenous vein: Anatomical considerations","authors":"Adam Sedlák ,&nbsp;David Kachlík","doi":"10.1016/j.aanat.2025.152656","DOIUrl":"10.1016/j.aanat.2025.152656","url":null,"abstract":"<div><h3>Background</h3><div>The innominate tributary of the small saphenous vein can be found medial to the calcaneal tendon, coursing proximally and draining into the trunk of the small saphenous vein in the distal third of the leg. The aim of our scientific paper is to thoroughly describe this innominate tributary, its incidence and relation to surrounding structures through anatomical dissection.</div></div><div><h3>Methods</h3><div>Authors thoroughly dissected sixty-one body donor lower limbs. As an adequate point of reference for measurements, the apex/tip of the lateral malleolus was selected. If a venous perforator was present, its position was related to the sole of the foot and to the posterior margin of the medial malleolus. In addition, each fibula was measured as a representation of the length of each limb.</div></div><div><h3>Results</h3><div>The investigated vein was found among 68.85 % (42/61) of lower limbs. Moreover, twenty-six bodies (83.87 %) evinced the vein in at least one of their legs. The average communication point with the trunk of the small saphenous vein lied 15.04 ± 3.94 cm (male limbs) and 15.05 ± 2.29 cm (female limbs) proximal to the lateral malleolus. On top of that, 82.93 % of veins also showed an interconnection with the posterior tibial perforators.</div></div><div><h3>Conclusion</h3><div>This paper provides detailed anatomical data about the innominate tributary of the small saphenous vein. Our observation may propose new alternatives to traditional venous grafts from saphenous veins. Moreover, a significant relation to the perforators of the leg was found. Lastly, authors propose to denominate this vein as Achillean vein or calcaneal tendon vein.</div></div>","PeriodicalId":50974,"journal":{"name":"Annals of Anatomy-Anatomischer Anzeiger","volume":"260 ","pages":"Article 152656"},"PeriodicalIF":2.0,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143744630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geometric morphometric analysis of body shape and sexual dimorphism in Colossoma macropomum","authors":"İhsan Berat Kiliçli ,&nbsp;Barış Batur ,&nbsp;Hasen Awel Yunus ,&nbsp;Caner Bakici","doi":"10.1016/j.aanat.2025.152659","DOIUrl":"10.1016/j.aanat.2025.152659","url":null,"abstract":"<div><h3>Background</h3><div>This study investigates sexual dimorphism in <em>Colossoma macropomum</em> using geometric and linear morphometrics.</div></div><div><h3>Methods</h3><div>A total of 26 specimens (14 females, 12 males) were analysed through shape analysis (MorphoJ) and linear measurements (ImageJ). Statistical analysis of both linear and geometric morphometry was performed using the PAST program.</div></div><div><h3>Results</h3><div>Geometric morphometric analysis identified statistically significant differences in body shape between males and females. Females were characterised by a shorter and narrower body form, while males exhibited a longer and broader morphology. Notably, the caudal fin base's flexion axis, along with the position and length of the anal fin, were highlighted as key anatomical regions for distinguishing between adult males and females. Linear morphometric analysis further revealed significant sex-specific variations, particularly in the head region and anterior body width.</div></div><div><h3>Conclusion</h3><div>The findings integrate quantitative data from linear morphometric with visualised results from geometric morphometric analysis, providing a detailed assessment of morphological distinctions. Potential drivers of these differences, including reproductive strategies, feeding behaviours, population density, genetic structure, aquaculture practices, water depth, and ecological niche differentiation, were explored to explain the observed sexual dimorphism. This research provides valuable insights into the morphological variation and evolutionary mechanisms underlying sexual dimorphism in <em>Colossoma macropomum</em>, with implications for species management and conservation. Moreover, it represents a novel contribution as the first comprehensive study to utilise geometric morphometric techniques to elucidate shape differences between male and female individuals of this species.</div></div>","PeriodicalId":50974,"journal":{"name":"Annals of Anatomy-Anatomischer Anzeiger","volume":"260 ","pages":"Article 152659"},"PeriodicalIF":2.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}