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https://www.readbyqxmd.com/read/28317556/skull-5-from-dmanisi-descriptive-anatomy-comparative-studies-and-evolutionary-significance
#1
G Philip Rightmire, Marcia S Ponce de León, David Lordkipanidze, Ann Margvelashvili, Christoph P E Zollikofer
A fifth hominin skull (cranium D4500 and mandible D2600) from Dmanisi is massively constructed, with a large face and a very small brain. Traits documented for the first time in a basal member of the Homo clade include the uniquely low ratio of endocranial volume to basicranial width, reduced vertex height, angular vault profile, smooth nasal sill coupled with a long and sloping maxillary clivus, elongated palate, and tall mandibular corpus. The convex clivus and receding symphysis of skull 5 produce a muzzle-like form similar to that of Australopithecus afarensis...
March 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28296944/multiple-osteochondromas-of-the-antlers-and-cranium-in-a-free-ranging-white-tailed-deer-odocoileus-virginianus
#2
Uwe Kierdorf, Karl V Miller, Stefan Flohr, Santiago Gomez, Horst Kierdorf
This paper reports a case of multiple osteochondromas affecting the antlers and the left zygomatic bone of a free-ranging adult white-tailed buck (Odocoileus virginianus) from Georgia, USA. Along with a few postcranial bones, the antlered cranium of the individual was found in a severely weathered condition and devoid of any soft tissue. The antlers exhibited five pedunculated exostoses that were composed of cancellous bone and, in their peripheral portions, also mineralized cartilage. The largest of the exostoses, located on the right antler, had a maximum circumference of 55 cm...
2017: PloS One
https://www.readbyqxmd.com/read/28289213/new-middle-pleistocene-hominin-cranium-from-gruta-da-aroeira-portugal
#3
Joan Daura, Montserrat Sanz, Juan Luis Arsuaga, Dirk L Hoffmann, Rolf M Quam, María Cruz Ortega, Elena Santos, Sandra Gómez, Angel Rubio, Lucía Villaescusa, Pedro Souto, João Mauricio, Filipa Rodrigues, Artur Ferreira, Paulo Godinho, Erik Trinkaus, João Zilhão
The Middle Pleistocene is a crucial time period for studying human evolution in Europe, because it marks the appearance of both fossil hominins ancestral to the later Neandertals and the Acheulean technology. Nevertheless, European sites containing well-dated human remains associated with an Acheulean toolkit remain scarce. The earliest European hominin crania associated with Acheulean handaxes are at the sites of Arago, Atapuerca Sima de los Huesos (SH), and Swanscombe, dating to 400-500 ka (Marine Isotope Stage 11-12)...
March 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28280481/the-optic-canal-a-bottleneck-for-cerebrospinal-fluid-dynamics-in-normal-tension-glaucoma
#4
Achmed Pircher, Margherita Montali, Jatta Berberat, Luca Remonda, Hanspeter E Killer
PURPOSE: To report on the optic canal cross-sectional area (OCA) in Caucasian patients with normal-tension glaucoma (NTG) compared with Caucasian control subjects without known optic nerve (ON) diseases. METHODS: Retrospective analysis of computed tomographic images of the cranium and orbits in 56 NTG patients (30 females and 26 males; 99 of 112 eyes; mean age 67.7 ± 11.1 years). Fifty-six age- and gender-matched subjects (mean age: 68.0 ± 11.2 years) without known ON diseases served as controls...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28248698/extracranial-origin-of-headache
#5
Rami Burstein, Pamela Blake, Aaron Schain, Carlton Perry
PURPOSE OF REVIEW: To summarize recent clinical and preclinical studies on extracranial pathophysiologies in migraine. It challenges the opinion-based notion that the headache phase of migraine occurs without input from peripheral nociceptors or is caused solely by activation of intracranial nociceptors supplying dural and cerebral vasculature. RECENT FINDINGS: Data that support a scenario by which migraine can originate extracranially include the perception of imploding headache that hurts outside the cranium, the existence of a network of sensory fibers that bifurcate from parent axons of intracranial meningeal nociceptors and reach extracranial tissues such as periosteum and pericranial muscles by crossing the calvarial bones through the sutures, the discovery of proinflammatory genes that are upregulated and anti-inflammatory genes that are down regulated in extracranial tissue of chronic migraine patients, and evidence that administration of OnabotulinumtoxinA to peripheral tissues outside the calvaria reduces frequency of migraine headache...
March 14, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/28247440/clinical-features-imaging-characteristics-and-long-term-outcome-of-dogs-with-cranial-meningocele-or-meningoencephalocele
#6
K Lazzerini, R Gutierrez-Quintana, R José-López, F McConnell, R Gonçalves, J McMurrough, S De Decker, C Muir, S L Priestnall, L Mari, F Stabile, L De Risio, C Loeffler, A Tauro, C Rusbridge, S Rodenas, S Añor, C de la Fuente, A Fischer, A Bruehschwein, J Penderis, J Guevar
BACKGROUND: The term meningoencephalocele (MEC) describes a herniation of cerebral tissue and meninges through a defect in the cranium, whereas a meningocele (MC) is a herniation of the meninges alone. HYPOTHESIS/OBJECTIVES: To describe the clinical features, magnetic resonance imaging (MRI) characteristics, and outcomes of dogs with cranial MC and MEC. ANIMALS: Twenty-two client-owned dogs diagnosed with cranial MC or MEC. METHODS: Multicentric retrospective descriptive study...
February 28, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28207472/intradiploic-epithelial-inclusion-cyst-of-the-cranium-mimicking-fibrous-dysplasia
#7
Max Mandelbaum, Jerry W Chao, Gary F Rogers, Cheng-Ying Ho, Suresh N Magge
Intradiploic inclusion cysts are exceedingly rare in the pediatric population. The authors present a 16-year-old male patient who presented with a large growing calvarial mass with a preoperative diagnosis of fibrous dysplasia based on radiologic imaging. Craniectomy followed by autogenous reconstruction was performed. Histopathological examination revealed a relatively small inclusion cyst of the intradiploic space, surrounded by reactive bone. This patient demonstrates a highly unusual presentation of a rare entity, and the authors discuss the diagnosis and management of intradiploic inclusion cysts...
February 15, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28190494/suspected-x-linked-facial-dysmorphia-and-growth-retardation-in-related-labrador-retriever-puppies
#8
C Dierks, H Hoffmann, F Heinrich, M Hellige, M Hewicker-Trautwein, O Distl
Seven male Labrador retriever puppies from four different litters were identified with a brachycephalic-like face and skull, associated with low birth weight, severe growth retardation, and reduced abilities to crawl and suckle, which were not compatible with survival. Excessive doming of the cranium, brachygnathia superior and inferior, and an abnormally opened fontanelle were found in all affected puppies by computed tomography and at post-mortem examination. Pedigree analysis supported an X-linked recessive mode of inheritance...
February 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28187584/osteology-of-i-physalaemus-i-i-nattereri-i-anura-leptodactylidae-with-comments-on-intraspecific-variation
#9
Jéssica Fratani, Manoela Woitovicz-Cardoso, Ana Carolina Calijorne Lourenço
The cranium, postcranium, and osteological variation of Physalaemus nattereri (Steindachner) are described. The main sources of variation involve the degree of mineralization of the nasal capsule and the lengths of dermal skull bones (e.g., vomer, sphenethmoid, and neopalatine). Osteologically, P. nattereri differs from its congeners by the anterior placement of the jaw articulation (which lies anterior to the intersection between the alae and cultriform process of parasphenoid), and by the separation of the frontoparietals from the anterior margins of exoccipitals...
February 2, 2017: Zootaxa
https://www.readbyqxmd.com/read/28186868/effects-of-near-infrared-light-on-cerebral-bioenergetics-measured-with-phosphorus-magnetic-resonance-spectroscopy
#10
Dionyssios Mintzopoulos, Timothy E Gillis, Clark E Tedford, Marc J Kaufman
OBJECTIVE: Cerebral photobiomodulation (PBM) improves mood and cognition. Cerebral metabolic enhancement is a mechanism proposed to underlie PBM effects. No PBM studies to date have applied phosphorus magnetic resonance spectroscopy ((31)P MRS), which can be used to assess metabolic intermediates such as phosphocreatine (PCr) and adenosine triphosphate, the latter of which is elevated by PBM. Accordingly, we used 9.4 Tesla (31)P MRS to characterize effects of single and repeat cerebral PBM treatments on metabolism...
February 9, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28182063/frontal-bone-metastasis-from-an-occult-follicular-thyroid-carcinoma-diagnosed-by-fnac
#11
Rajnish Kalra, Richa Pawar, Sonia Hasija, Abha Chandna, Manoj Sankla, Chanchal Malhotra
Metastatic deposits in skull bones from follicular thyroid carcinoma is rare, and metastatic disease in skull being the presenting symptom without obvious thyroid lesion (occult primary) is even rarer. A 60-year-old female patient presented with a mass in the frontal region of the skull. Fine needle aspiration cytology was done which revealed an adenocarcinoma with repeated follicular pattern, reminiscent of follicular neoplasm of thyroid, which on immunocytochemistry revealed positivity for thyroglobulin. Patient was investigated further for primary thyroid malignancy, and imaging revealed a nodule in the left lobe of thyroid...
January 2017: Journal of Cytology
https://www.readbyqxmd.com/read/28177302/a-fast-degrading-thiol-acrylate-based-hydrogel-for-cranial-regeneration
#12
A M Emmakah, H E Arman, J C Bragg, T Greene, M B Alvarez, P J Childress, W S Goebel, M A Kacena, C C Lin, T M Chu
Successful regeneration of the cranium in patients suffering from cranial bone defects is an integral step to restore craniofacial function. However, restoration of craniofacial structure has been challenging due to its complex geometry, limited donor site availability, and poor graft integration. To address these problems, we investigated the use of a thiol-acrylate hydrogel as a cell carrier to facilitate cranial regeneration. Thiol-acrylate hydrogels were formulated with 5-15 wt% poly(ethylene glycol)-diacrylate (PEGDA) and 1-9 mm dithiothreitol (DTT)...
March 17, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28176372/development-of-the-skull-and-pectoral-girdle-in-siberian-sturgeon-acipenser-baerii-and-russian-sturgeon-acipenser-gueldenstaedtii-acipenseriformes-acipenseridae
#13
Peter Warth, Eric J Hilton, Benjamin Naumann, Lennart Olsson, Peter Konstantinidis
The head is considered the major novelty of the vertebrates and directly linked to their evolutionary success. Its form and development as well as its function, for example in feeding, is of major interest for evolutionary biologists. In this study, we describe the skeletal development of the cranium and pectoral girdle in Siberian (Acipenser baerii) and Russian sturgeon (A. gueldenstaedtii), two species that are commonly farmed in aquaculture and increasingly important in developmental studies. This study comprises the development of the neuro-, viscero- and dermatocranium and the dermal and chondral components of the pectoral girdle, from first condensation of chondrocytes in prehatchlings to the early juvenile stage and reveals a clear pattern in formation...
February 7, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28167076/brain-network-alterations-in-the-inflammatory-soup-animal-model-of-migraine
#14
Lino Becerra, James Bishop, Gabi Barmettler, Vanessa Kainz, Rami Burstein, David Borsook
Advances in our understanding of the human pain experience have shifted much of the focus of pain research from the periphery to the brain. Current hypotheses suggest that the progression of migraine depends on abnormal functioning of neurons in multiple brain regions. Accordingly, we sought to capture functional brain changes induced by the application of an inflammatory cocktail known as inflammatory soup (IS), to the dura mater across multiple brain networks. Specifically, we aimed to determine whether IS alters additional neural networks indirectly related to the primary nociceptive pathways via the spinal cord to the thalamus and cortex...
April 1, 2017: Brain Research
https://www.readbyqxmd.com/read/28165165/recombinant-bone-morphogenetic-protein-2-and-platelet-derived-growth-factor-bb-for-localized-bone-regeneration-histologic-and-radiographic-outcomes-of-a-rabbit-study
#15
Daniel S Thoma, Hyun-Chang Lim, Vitor M Sapata, Sora R Yoon, Ronald E Jung, Ui-Won Jung
OBJECTIVES: Improvement in localized bone regeneration is needed to avoid the use of autogenous tissue. For that purpose, the use biologic mediators was proposed. The aim was to test whether or not one of two biologic mediators, recombinant human bone morphogenetic protein-2 (rhBMP-2) or recombinant platelet-derived growth factor (rhPDGF-BB), is superior to the other and to control groups for localized bone regeneration. MATERIALS AND METHODS: Four cylinders (height: 5 mm; diameter: 7 mm) were screwed on the parietal and frontal bones at the cranium in 12 rabbits...
February 6, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28162174/-viability-of-osteoblasts-under-cell-hypoxia-condition
#16
C Wu, W W Zheng, M Yang
Objective: To investigate the effects of hypoxia condition and hypoxia-reoxygenation condition on the cell viability, apoptosis rate and gene expression of osteoblasts cultured in vitro. Methods: The cranium osteoblasts from newborn Sprague Dawley rats within 48 hours were cultured and purified through tissue block method.The morphological changes of cells were evaluated by the Alizarin Red S staining and Alkaline phosphatase staining.The third-generation osteoblasts were cultured in normal condition for 36 hours (group A), in hypoxic condition for 24hours (group B), in hypoxic condition for 24hours thereafter reoxygenated for 12 hours (group D), in hypoxic condition for 36 hours (group C)...
January 17, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28156213/structural-brain-differences-in-school-age-children-with-and-without-single-suture-craniosynostosis
#17
Kristina Aldridge, Brent R Collett, Erin R Wallace, Craig Birgfeld, Jordan R Austin, Regina Yeh, Madison Feil, Kathleen A Kapp-Simon, Elizabeth H Aylward, Michael L Cunningham, Matthew L Speltz
OBJECTIVE Single-suture craniosynostosis (SSC), the premature fusion of a cranial suture, is characterized by dysmorphology of the craniofacial skeleton. Evidence to suggest that children with SSC are at an elevated risk of mild to moderate developmental delays and neurocognitive deficits is mounting, but the associations among premature suture fusion, neuroanatomy, and neurocognition are unexplained. The goals of this study were to determine 1) whether differences in the brain are present in young children with the 2 most common forms of SSC (sagittal and metopic) several years following surgical correction, and 2) whether the pattern of differences varies by affected suture (sagittal or metopic)...
February 3, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28147383/incidence-of-secondary-hydrocephalus-after-excision-of-huge-encephaloceles-in-neonates-case-study
#18
Ehab Ahmed El Refaee, Mohamed Ibrahim Refaat, Mohamed Reda
Background Encephaloceles presents as a protrusion of the cranial contents through a defect in the cranium. The most common sites of occurrence are the occipital and frontonasal regions. The surgical outcome is reported to be satisfactory; however, the incidence of hydrocephalus in patients with encephaloceles is variable in the literature. This study investigated the relationship between the size of the encephaloceles and the occurrence of hydrocephalus. Patient and Methods Data of all neonates with encephaloceles who presented to our institution from September 2012 to September 2014 were collected...
February 1, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28146571/evolution-of-a-functional-head-joint-in-deep-sea-fishes-stomiidae
#19
Nalani K Schnell, G David Johnson
The head and anterior trunk region of most actinopterygian fishes is stiffened as, uniquely within vertebrates, the pectoral girdles have a direct and often strong connection through the posttemporal to the posterior region of the skull. Members of the mesopelagic fish family Stomiidae have their pectoral girdle separated from the skull. This connection is lost in several teleost groups, but the stomiids have an additional evolutionary novelty-a flexible connection between the occiput and the first vertebra, where only the notochord persists...
2017: PloS One
https://www.readbyqxmd.com/read/28140642/comparison-of-penetrating-and-nonpenetrating-captive-bolt-methods-in-horned-goats
#20
COMPARATIVE STUDY
Samantha L Collins, Marc Caldwell, Silke Hecht, Brian K Whitlock
OBJECTIVE To use MRI and CT to compare the amount of tissue damage (soft tissue and bone) to the heads of goats after administration of a nonpenetrating or penetrating captive bolt. ANIMALS Cadavers of twelve 1- to 5-year-old mixed-breed goats that had been euthanized with an overdose of pentobarbital as part of an unrelated study. PROCEDURES Cadavers were randomly assigned to receive a nonpenetrating (n = 6) or penetrating (6) captive bolt. The head of 1 cadaver was imaged via CT and MRI. The muzzle of a device designed to administer either a penetrating or nonpenetrating captive bolt was then placed flush on the dorsal midline of each head at the level of the external occipital protuberance (poll) and aimed downward toward the cranialmost portion of the intermandibular space, and the assigned bolt was administered...
February 2017: American Journal of Veterinary Research
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