Academic literature on the topic 'Lambdoid suture'

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Journal articles on the topic "Lambdoid suture"

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Catur, Kusumo, Suryaningtyas Wihasto, and Arifin Parenrengi M. "Apert Syndrome with Combination of Synostosis: A Case Report." INTERNATIONAL JOURNAL OF MULTIDISCIPLINARY RESEARCH AND ANALYSIS 07, no. 06 (2024): 2712–19. https://doi.org/10.5281/zenodo.12526505.

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Apert syndrome is a rare condition affecting the skull, face, hands and feet due to premature closure of cranial sutures. This case report describes a 6-month-old boy with Apert syndrome presenting with an abnormal head shape. A CT scan revealed craniosynostosis (fused sutures) of both the coronal and lambdoid sutures. Surgery involved removing a 1-2 cm section of the fused sutures along the coronal suture and across the lambdoid suture. After 4 months, the boy showed improvement in both clinical appearance and imaging scans. While Apert syndrome is typically classified based on the suture involved, the specific timing of surgery depends on various factors. This case demonstrates that minimally invasive surgery can be effective with minimal complications. Even though unilateral coronal and lambdoid suture fusion in Apert syndrome is uncommon, it can still be successfully treated with surgery.
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Jimenez, David F., Constance M. Barone, Ravelo V. Argamaso, James T. Goodrich, and Robert J. Shprintzen. "Asterion Region Synostosis." Cleft Palate-Craniofacial Journal 31, no. 2 (1994): 136–41. http://dx.doi.org/10.1597/1545-1569_1994_031_0136_ars_2.3.co_2.

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Posterior plagiocephaly historically has been associated with synostosis of the lambdoid suture. The incidence, diagnosis, and modes of treatment for stenosis of the lambdoid suture remain controversial. Commonly, the lambdoid suture is found to be open both on radiographic examination and at the time of surgery. The study reports on nine patients who presented with unilateral posterior plagiocephaly and who were found to have open lambdoid sutures, but a stenosed region of the asterion. The area of Involvement included the distal-most lambdoid suture, the parietomastoid, occipitomastoid, and proximal squamosal sutures. Positional molding or torticollis was ruled out in all patients. All the patients showed progressive involvement of the skull base, including anterior shifts of the ipsilateral ear, compensatory Ipsilateral frontal bossing and malar protrusion. Stenosis of the asterion was diagnosed with three-dimensional computed tomography scans, corroborated at the time of surgery and confirmed histologically. Surgical correction Involved resection of the affected asterion and reconstruction using a bandeau-technique, barrel staves of the occipital bone and bone graft transposition. This approach provided excellent esthetic results in all patients.
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Keshav Tumram, Nilesh, Soniya B.Parchake, Arun P. Kasote, and Meena M. Meshram. "Macroscopic Cranial Suture Closure in An Adult Population: Is It Reliable for Estimating Age?" 99 3, no. 1 (2021): 17–30. http://dx.doi.org/10.26735/ijjm2816.

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Background:- Age estimation is one of the important parameters for estimation of biological profile of an individual. Generally speaking, estimation of age of an individual whether living or dead is very important in Medicolegal and forensic scenario. The objective of the present study was to observe the chronology and pattern of union of cranial sutures namely coronal and lambdoid and to find out the relationship between closure of cranial suture and age of the deceased. An attempt was also made to see the applicability of Acsadi and Nemeskeri method in an Indian population. A total of 193 adult calvaria (133 males and 60 females) were studied from the autopsy cases. The extent of obliteration was studied ectocranially and endocranially in the two main sutures of the calvarium i.e. coronal and lambdoid. Results:- The results indicate that a strong positive correlation of ectocranial with endocranial suture closure is found in the age group of 30-39 years for right coronal, left coronal, while age group of 60-69 years shows a strong positive correlation for lambdoid sutures. This has also been confirmed in the study that the cranial suture obliteration starts endocranially and proceeds towards ectocranial surface. Statistically insignificant sex differences exist in suture closure. Conclusion:- The coronal and lambdoid sutures were closed in the age group of above 70 years with mean values of 3.54 for coronal and 3.7 for lambdoid suture. Acsadi and Nemeskeri’s method was found to be applicable to the Indian population for determination of age from cranial sutures.
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Wilkinson, C. Corbett, Nicholas V. Stence, Cesar A. Serrano, et al. "Fusion patterns of major calvarial sutures on volume-rendered CT reconstructions." Journal of Neurosurgery: Pediatrics 25, no. 5 (2020): 519–28. http://dx.doi.org/10.3171/2019.11.peds1953.

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OBJECTIVERecently, the authors investigated the normal course of fusion of minor lateral calvarial sutures on “3D” volume-rendered head CT reconstructions in pediatric trauma patients. While evaluating these reconstructions, they found many more fused sagittal sutures than expected given the currently accepted prevalence of sagittal craniosynostosis. In the present study, using the same set of head CT reconstructions, they investigated the course of fusion of the sagittal as well as the lambdoid, coronal, and metopic sutures.METHODSThey reviewed all volume-rendered head CT reconstructions performed in the period from 2010 through mid-2012 at Children’s Hospital Colorado for trauma patients aged 0–21 years. Each sagittal, lambdoid, coronal, or metopic suture was graded as open, partially fused, or fused. The cephalic index (CI) was calculated for subjects with fused and partially fused sagittal sutures.RESULTSAfter exclusions, 331 scans were reviewed. Twenty-one subjects (6%) had fusion or partial fusion of the sagittal suture. Four of the 21 also had fusion of the medial lambdoid and/or coronal sutures. In the 17 subjects (5%) with sagittal suture fusion and no medial fusion of adjacent sutures, the mean CI was 77.6. None of the 21 subjects had been previously diagnosed with craniosynostosis. Other than in the 21 subjects already mentioned, no other sagittal or lambdoid sutures were fused at all. Nor were other coronal sutures fused medially. Coronal sutures were commonly fused inferiorly early during the 2nd decade of life, and fusion progressed superiorly and medially as subjects became older; none were completely fused by 18 years of age. Fusion of the metopic suture was first seen at 3 months of life; fusion was often not complete until after 2 years.CONCLUSIONSThe sagittal and lambdoid sutures do not usually begin to fuse before 18 years of age. However, more sagittal sutures are fused before age 18 than expected given the currently accepted prevalence of craniosynostosis. This finding is of unknown significance, but likely many of them do not need surgery. The coronal suture often begins to fuse inferiorly early in the 2nd decade of life but does not usually complete fusion before 18 years of age. The metopic suture often starts to fuse by 3 months of age, but it may not completely fuse until after 2 years of age.
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Karthikeya Patil, Mahima VG, Poornima Chandran, SrishtiTayal, and Jaishankar HP. "Applications of Reverse Panoramic Radiography for Age and Gender Determination- A Radiographic Study." Indian Journal of Forensic Medicine & Toxicology 15, no. 3 (2021): 262–75. http://dx.doi.org/10.37506/ijfmt.v15i3.15315.

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Objectives: This study was conducted to establish if any correlation exists between individual’s chronological age and lambdoid sutures closure status in mortals through modified reverse panoramic radiograph.Materials and Methods: Total number of 140 subjects, 10 years and beyond were included in the study, and divided into seven groups with an age interval of 5 years. Assessment of lambdoid suture closure was done according to Frederic Rating Scale on modified reverse panoramic radiographs. Data obtained was subjected to statistical analysis using Cramer’s V test.Results: A significant correlation was observed between the age group and suture closure. Cramer’s test gave value of 0.000, and was interpreted as a good correlation between the age and suture closure status with a P value of <0.05Conclusion: Lambdoid suture can be very effective and reliable practical tool for age assessment in mortalsthrough modified reverse panoramic radiography (ectocranially)
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Cinalli, Giuseppe, Dominique Renier, Guy Sebag, Christian Sainte-Rose, Eric Arnaud, and Alain Pierre-Kahn. "Chronic tonsillar herniation in Crouzon's and Apert's syndromes: the role of premature synostosis of the lambdoid suture." Journal of Neurosurgery 83, no. 4 (1995): 575–82. http://dx.doi.org/10.3171/jns.1995.83.4.0575.

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✓ The incidence of chronic tonsillar herniation (CTH) was evaluated with magnetic resonance imaging in 44 patients with Crouzon's syndrome and 51 with Apert's syndrome; the incidence was 72.7% in Crouzon's syndrome and 1.9% in Apert's syndrome. All the patients with Crouzon's syndrome and progressive hydrocephalus had CTH, but of 32 individuals with Crouzon's syndrome and CTH, only 15 had progressive hydrocephalus. Five patients with Apert's syndrome were treated for progressive hydrocephalus; none had CTH. The patterns of suture closure in these two groups of patients were studied, and significant differences in coronal, sagittal, and lambdoid sutures were found between patients with Crouzon's and Apert's syndromes. In Crouzon's syndrome, significant differences in the pattern of lambdoid suture closure were found between the groups with and without CTH; in the group with CTH, the lambdoid closure appeared earlier. The authors propose that the high incidence of individuals with CTH who have Crouzon's syndrome is related to the premature synostosis of the lambdoid suture in the first 24 months of age.
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Whitton, Alaina, Sharon L. Hyzy, Chelsea Britt, Joseph K. Williams, Barbara D. Boyan, and Rene Olivares-Navarrete. "Differential spatial regulation of BMP molecules is associated with single-suture craniosynostosis." Journal of Neurosurgery: Pediatrics 18, no. 1 (2016): 83–91. http://dx.doi.org/10.3171/2015.12.peds15414.

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OBJECTIVE The aim of this study was to examine messenger RNA (mRNA) levels of bone morphogenetic protein (BMP) ligands, receptors, and soluble inhibitors in cells isolated from single-suture synostoses from fused coronal, metopic, sagittal, and lambdoid sutures. METHODS Cells were isolated from bone collected from patients undergoing craniotomies at Children's Healthcare of Atlanta. Real-time polymerase chain reaction was used to examine mRNA levels in cells isolated from fused sutures or patent sutures in comparison with levels in normal bone from the same patient. RESULTS Cells isolated from fused sutures in cases of sagittal and coronal synostosis highly expressed BMP2, while cells isolated from fused metopic or lambdoid synostosis expressed high BMP4. Noggin, a BMP inhibitor, was lower in fused sutures and had high expression in patent sutures. CONCLUSIONS These results suggest that BMPs and inhibitors play a significant role in the regulation of suture fusion as well in the maintenance of patency in the normal suture.
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V., Sharma, Jeewane S., Marskone S., and Soni R. "Os Inca Totum-Anthropological and Embryological Basis." PJSR 7, no. 1 (2014): 34–36. https://doi.org/10.5281/zenodo.8255605.

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Complete division of membranous and cartilaginous part of occipital bone by a transverse suture extending between the two lambdoid sutures at the level of highest nuchal line above the external occipital protuberance, results in a rare cranial variation presenting as Os Inca totum. During oesteological study of human skull in the central India region, one male skull showing complete undivided Inca bone was found. The interparital bone is formed by the part of the squamous occipital bone that is bounded by two lambdoid sutures on two sides and inferiorly by transverse suture. Such finding is rare in occurrence and have a significant anthropological and embryological basis.
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Asharani S K. "A STUDY ON THE OCCURRENCE OF WORMIAN BONES IN ADULT DRY SKULLS." International Journal of Anatomy and Research 8, no. 4.2 (2020): 7814–16. http://dx.doi.org/10.16965/ijar.2020.228.

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Background: Sutural or wormian bones are islands of bone that are commonly found in the sutures of the skull mainly along the lambdoid suture. These sutural bones which are irregular in size, shape and number may arise from separate centres of ossification. The prior knowledge about the Wormian bones is important because they are present in normal individuals as well as in various disorders such as osteogenesis imperfect, rickets, etc. Aim: To study the occurence of wormian bones in adult dry skulls Materials and Methods: The present study was carried out on 95 adult dry human skulls in the department of Anatomy, Adichunchanagiri Institute of Medical Sciences, B G Nagara. Skulls with fractures and deformities were excluded from the study. Intact skulls were cleaned thoroughly and observed for the presence of wormian bones along the sutures of skull. Results: Out of 95 skull bones studied, 24 (25.26%) skulls showed the presence of wormian bones. We also observed that maximum number of such bones (single or multiple) were present along the lambdoid suture followed by lambda, asterion, sagittal suture & coronal suture. A very small wormian bone was also found near the bregma of the skull. Conclusion: The awareness about the occurrence of wormian bones and their topographical distribution will guide the clinicians mainly neurosurgeons in their practice. These bones mimic fracture lines in radiograph; therefore radiologists must also be aware of this normal variation. KEY WORDS: Wormian bone, Lambdoid suture, skull.
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Boyajian, Michael K., Hanny Al-Samkari, Dennis C. Nguyen, Sybill Naidoo, and Albert S. Woo. "Partial Suture Fusion in Nonsyndromic Single-Suture Craniosynostosis." Cleft Palate-Craniofacial Journal 57, no. 4 (2020): 499–505. http://dx.doi.org/10.1177/1055665620902299.

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Introduction: Partial synostosis of cranial sutures has been shown to have clinical and diagnostic significance. However, there is limited published information about how suture fusion progresses over time. In this study, we evaluate patients with nonsyndromic single-suture synostosis. We aim to define the incidence of partial versus complete suture fusion and whether a correlation exists between the degree of suture fusion and age. Methods: Two hundred fifty-four patients with nonsyndromic single-suture synostosis were evaluated. Preoperative computed tomography (CT) scans were rendered in 3-dimensions, all sutures were visualized and assessed for patency or fusion, and length of fusion was measured. Findings were grouped according to suture type (sagittal, coronal, metopic, or lambdoid), the degree of fusion (full, >50%, or <50%), and patient age at time of CT scan (0-90, 91-180, 181-360, or >360 days). Data were analyzed to correlate patient age versus the degree of suture fusion. Results: For all patients, 72% had complete and 28% had partial synostosis. Ratios of full to partial fusion for each suture type were as follows: sagittal 97:36, coronal 35:22, metopic 46:4, and lambdoid 4:10. The sagittal, coronal, and metopic groups demonstrated greater probabilities of complete suture fusion as patient age increases ( P = .021, P < .001, P = .001, respectively). This trend was also noted when all sutures were considered together by age-group ( P < .001). Conclusion: We note a partial suture fusion rate of 28.3%. Our analysis shows a correlation between the extent of suture synostosis and patient age. Finally, we demonstrate that different sutures display different patterns of partial and complete fusion.
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Book chapters on the topic "Lambdoid suture"

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Jimenez, David F. "Lambdoid Suture Synostosis: Endoscopic Approach, Key Points for Neurosurgeons." In Neurosurgical Aspects of Craniosynostosis. Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-031-69386-1_48.

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Messing-Jünger, Martina. "Lambdoid Suture Synostosis: Open Vault Surgery, Key Points for the Neurosurgeons." In Neurosurgical Aspects of Craniosynostosis. Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-031-69386-1_49.

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Pehlivanoglu, Suray, and Sebnem Pehlivanoglu. "Craniosynostosis: Clinical Characteristics, Molecular Mechanisms and Treatment." In Molecular Approaches in Medicine. Nobel Tip Kitabevleri, 2024. http://dx.doi.org/10.69860/nobel.9786053359524.6.

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Craniosynostosis is a congenital condition marked by the early fusion of one or more cranial sutures. Cranial sutures are fibrous tissues that connect the skull bones. They play a crucial role in ensuring bone formation at the edges of the calvarial bones, which move apart to facilitate the passage of the head through the birth canal and allow for future brain growth. The premature fusion limits skull growth perpendicular to the affected sutures, potentially resulting in abnormal head shapes, increased intracranial pressure, and developmental delays. The prevalence of craniosynostosis is about 1 in 2100-3000 births. Craniosynostosis is primarily categorized into primary and secondary types. Primary craniosynostosis is further divided into non-syndromic and compound craniosynostosis, the latter including bicoronal synostosis and syndromic craniosynostosis. Approximately 85% of craniosynostosis cases are non-syndromic, with 92% being sporadic. Non-syndromic craniosynostosis can present as sagittal, coronal, metopic, or lambdoid synostosis. Sagittal synostosis is the most common type, with a prevalence of 40–55%. To date, over 180 craniosynostotic syndromes have been described. Typically, these syndromes show autosomal, recessive, and X-linked inheritance patterns. Some classic craniosynostosis syndromes include Apert syndrome, Antley-Bixler syndrome, Carpenter syndrome, Crouzon syndrome, Jackson-Weiss syndrome, Muenke syndrome, Pfeiffer syndrome, and Saethre-Chotzen syndrome. The genes associated with craniosynostoses include FGFR1, FGFR2, FGFR3, TWIST1, RAB23, EFNB1, TCF12, MSX2, POR, and ERF. FGFR signaling regulates proteoblast/osteoblast differentiation, proliferation, migration, and apoptosis, as well as vertebrate organogenesis and morphogenesis. Gain-of-function mutations in components of this signaling pathway have been implicated in craniosynostoses. Genetic algorithms provide a roadmap for diagnosing syndromic craniosynostosis based on genetic causes. Genetic tests should be guided by clinical findings, family history, and available scientific evidence. The diagnosis of a specific type of syndromic craniosynostosis should integrate clinical and genetic findings. Managing craniosynostosis requires a collaborative effort from various medical disciplines. Treatment typically involves surgical intervention to address both functional and cosmetic concerns. The optimal timing and approach to treatment depend on factors such as the severity of cranial deformity, the age of the patient, and the specific type of craniosynostosis.
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Vinchon, Matthieu. "Lambdoid Sutures Synostosis: Key Points for the Neurosurgeons, Management Principles (Diagnosis, Surgical Principles and Their Rationale, Timing)." In Neurosurgical Aspects of Craniosynostosis. Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-031-69386-1_10.

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Mann, Felix. "Lambdoid Suture Area." In Reinventing Acupuncture. Elsevier, 2000. http://dx.doi.org/10.1016/b978-0-7506-4857-8.50026-0.

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Kimbel, William H., Yoel Rak, Donald C. Johanson, Ralph L. Holloway, and Michael S. Yuan. "Recovery and Reconstruction of A.L. 444-2." In The Skull of Australopithecus afarensis. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780195157062.003.0005.

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The A.L. 444-2 skull was found on 26 February 1992, during a strategic paleontological survey of Kada Hadar Member sediments that are stratigraphically situated between BKT-1 and BKT-2 tephras, on the eastern edge of the Awash River’s Kada Hadar tributary. Yoel Rak discovered two fragments of hominin occipital bone (A.L. 444-1) at the base of a steep hill composed of Kada Hadar Member silts and clays capped by a weathered sandstone remnant. Subsequent examination of the upslope surface revealed additional hominin skull fragments (the temporal bones and maxillae) clustered together and partially exposed in a narrow gully that dissected the face of the hill. During the next seven days, probing and dry sieving of the gully infill and hillside colluvium over a 77 m2 area led to the recovery of fragments representing about 75%–80% of a single hominin skull. It was immediately apparent that the upslope finds duplicated the anatomical parts represented by the two A.L. 444-1 occipital fragments and therefore constituted a second hominin individual, cataloged as A.L. 444-2. In addition, the lambdoidal suture of the A.L. 444-1 occipital is completely unfused, suggesting subadult status, whereas fused cranial sutures and extreme dental occlusal wear indicate an advanced ontogenetic age for A.L. 444-2. In February–March 1993 the A.L. 444 hillside was excavated in an effort to locate missing parts of the A.L. 444-2 skull and to determine its precise stratigraphic provenance. No further remains of the hominin skull were encountered in situ, but a complete viverrid cranium and indeterminate fragments of large mammal bone with preservation and patina (mottled dark gray, white, and yellowish gray) identical to those of the hominin were excavated in an unstratified, cemented carbonate silt that exactly matches the matrix adhering to A.L. 444-2. We are confident that the hominin skull is from this sedimentary horizon. It is approximately 10.5 m stratigraphically below the BKT-2 tephra, which outcrops in the immediate vicinity of A.L. 444 Single-crystal laser fusion (SCLF) 40Ar/39Ar ages for BKT-2 and Kada Hadar Tuff (KHT) bracket the geological age of A.L. 444-2 between 2.94 and 3.18 Myr (Kimbel et al., 1994; Walter, 1994; Semaw et al., 1997).
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"FIG. 25.—The skull from the Neanderthal cavern. A. side, B. front, and C. top view. One half the natural size. The ontlines from camera lucida drawings, one half the natural size, by Mr. Busk: the details from the cast and from Dr. Fuhlrott’s photographs. a glabella; b occipital protuberance; d lambdoidal suture." In Man's Place in Nature, 1863. Routledge, 2004. http://dx.doi.org/10.4324/9780203503171-15.

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Conference papers on the topic "Lambdoid suture"

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Li, Yucheng, Andrew P. Murray, and David H. Myszka. "Synthesizing Mechanical Chains for Morphing Between Spatial Curves." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-98250.

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Abstract This work investigates the kinematic synthesis methodology for designing a chain of three-dimensional bodies to match a set of arbitrary spatial curves. The bodies synthesized can be one of three types: a rigid segment, a helical segment with constant curvature and torsion but varying length, and a growth segment that maintains its geometry but may be scaled to become larger or smaller. To realize mechanical chains, only rigid and helical segments are used. After designing the segments, they may be aligned with the original spatial curves with their ends connected via an optimization. For two curves, these connections may be made with revolute joints to obtain high accuracy. For three or more curves, spherical joint connections allow for the best accuracy. To compare curves as is useful in morphometry, all three segment types may be employed. In this case, an accurate description of the changes between curves is important, and optimizing to connect the segments is not needed. The procedure for redefining the curves in a way that the techniques in this paper may be applied, as well as the methodologies for synthesizing the three segment types are presented. Examples include a continuum robot problem and the morphometric analyses of chochlear curves and the lambdoidal suture. This work extends the established planar techniques for synthesizing mechanisms and addressing morphometric issues that are motivated with curves in two-dimensions.
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