keyword
MENU ▼
Read by QxMD icon Read
search

dropped head

keyword
https://www.readbyqxmd.com/read/29228508/cranial-backspatter-pattern-production-utilizing-human-cadavers
#1
Celestina Rossi, Lynne D Herold, Tom Bevel, Leslie McCauley, Stephanie Guadarrama
A backspatter pattern results from blood drops that travel retrograde to an applied external force. Historically, an array of animals and nonhuman objects have been used to create and study backspatter patterns. In this study, backspatter patterns captured on foam core targets that were placed 45.72 cm (18 in) behind the impact site (occipital area of the skull) were produced by cranial gunshots to human cadavers that were reinfused with fresh defibrinated bovine blood. These patterns were compared to the backspatter patterns produced by shooting blood-soaked sponges, a typical simulant used in controlled studies of backspatter pattern production and characteristics...
December 11, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/29223929/the-minimum-monitoring-signal-to-noise-ratio-for-off-axis-signals-and-its-implications-for-directional-hearing-aids
#2
Alan W Archer-Boyd, Jack A Holman, W Owen Brimijoin
The signal-to-noise ratio (SNR) benefit of hearing aid directional microphones is dependent on the angle of the listener relative to the target, something that can change drastically and dynamically in a typical group conversation. When a new target signal is significantly off-axis, directional microphones lead to slower target orientation, more complex movements, and more reversals. This raises the question of whether there is an optimal design for directional microphones. In principle an ideal microphone would provide the user with sufficient directionality to help with speech understanding, but not attenuate off-axis signals so strongly that orienting to new signals was difficult or impossible...
November 27, 2017: Hearing Research
https://www.readbyqxmd.com/read/29203322/effects-of-in-ovo-exposure-to-benzo-k-fluoranthene-bkf-on-cyp1a-expression-and-promoter-methylation-in-developing-chicken-embryos
#3
Jonas Brandenburg, Jessica A Head
Polycyclic aromatic hydrocarbons (PAHs) are toxic environmental pollutants that are potent teratogens. Recent research suggests that early life exposure to PAHs can affect health outcomes later in life. Some of these latent responses may be mediated by epigenetic mechanisms such as DNA methylation. The role of DNA methylation in regulating responses to PAHs in birds is currently unknown. Here, we assess the effect of in ovo exposure to the model PAH, benzo[k]fluoranthene (BkF), on aryl hydrocarbon receptor (AHR) mediated cytochrome P4501A (CYP1A) gene expression and promoter methylation in chicken embryos...
December 1, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/29201838/ganoderma-lucidum-protects-rat-brain-tissue-against-trauma-induced-oxidative-stress
#4
Özevren Hüseyin, İrtegün Sevgi, Deveci Engin, Aşır Fırat, Pektanç Gülsüm, Deveci Şenay
Objective: Traumatic brain injury causes tissue damage, breakdown of cerebral blood flow and metabolic regulation. This study aims to investigate the protective influence of antioxidant Ganoderma lucidum (G. lucidum) polysaccharides (GLPs) on brain injury in brain-traumatized rats. Methods: Sprague-Dawley conducted a head-traumatized method on rats by dropping off 300 g weight from 1 m height. Groups were categorized as control, G. lucidum, trauma, trauma+ G. lucidum (20 mL/kg per day via gastric gavage)...
October 2017: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/29193450/clostridium-butyricum-exerts-a-neuroprotective-effect-in-a-mouse-model-of-traumatic-brain-injury-via-the-gut-brain-axis
#5
H Li, J Sun, J Du, F Wang, R Fang, C Yu, J Xiong, W Chen, Z Lu, J Liu
BACKGROUND: Traumatic brain injury (TBI) is a common occurrence following gastrointestinal dysfunction. Recently, more and more attentions are being focused on gut microbiota in brain and behavior. Glucagon-like peptide-1 (GLP-1) is considered as a mediator that links the gut-brain axis. The aim of this study was to explore the neuroprotective effects of Clostridium butyricum (Cb) on brain damage in a mouse model of TBI. METHODS: Male C57BL/6 mice were subjected to a model of TBI-induced by weight-drop impact head injury and were treated intragastrically with Cb...
November 27, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29183568/vertical-head-and-pelvic-movement-symmetry-at-the-trot-in-dogs-with-induced-supporting-limb-lameness
#6
C B Gómez Álvarez, P Gustås, A Bergh, M Rhodin
Compensatory limb loading has been studied in lame dogs; however, little is known about how these compensations relate to motion of the head and pelvis, assessment of which is an important component of lameness examinations. The aim of this study was to describe the patterns of vertical head and pelvic motion symmetry at the trot in dogs with induced supporting limb lameness in the forelimbs or hind limbs. Ten sound dogs were trotted on a treadmill before and after temporary induction of moderate lameness (grade 2/5) in each limb...
November 2017: Veterinary Journal
https://www.readbyqxmd.com/read/29172124/material-mapping-strategy-to-improve-the-predicted-response-of-the-proximal-femur-to-a-sideways-fall-impact
#7
W S Enns-Bray, H Bahaloo, I Fleps, O Ariza, S Gilchrist, R Widmer, P Guy, H Pálsson, S J Ferguson, P A Cripton, B Helgason
Sideways falls are largely responsible for the highly prevalent osteoporotic hip fractures in today's society. These injuries are dynamic events, therefore dynamic FE models validated with dynamic ex vivo experiments provide a more realistic simulation than simple quasi-static analysis. Drop tower experiments using cadaveric specimens were used to identify the material mapping strategy that provided the most realistic mechanical response under impact loading. The present study tested the addition of compression-tension asymmetry, tensile bone damage, and cortical-specific strain rate dependency to the material mapping strategy of fifteen dynamic FE models of the proximal femur, and found improved correlations and reduced error for whole bone stiffness (R2 = 0...
October 27, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29166701/when-is-protection-from-impact-needed-for-the-face-as-well-as-the-eyes-in-occupational-environments
#8
Stephen J Dain, Rose Huang, Aimee Tiao, B Ralph Chou
BACKGROUND: The most commonly identified reason for requiring or using occupational eye and face protection is for protection against flying objects. Standards vary on what risk may require protection of the eyes alone and what requires protection for the whole face. Information on the minimum energy transfer for face damage to occur is not well-established. METHODS: The heads of pigs were used as the common model for human skin. A 6 mm steel ball projected at velocities between 45 and 135 m/s was directed at the face area...
November 22, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/29157629/mri-appearance-in-the-early-stage-of-legg-calv%C3%A3-perthes-disease-to-predict-lateral-pillar-classification-a-retrospective-analysis-of-the-labral-horizontalization
#9
Yasuhiro Shirai, Kenjiro Wakabayashi, Ikuo Wada, Yoshiaki Tsuboi, Myongsu Ha, Takanobu Otsuka
BACKGROUND: The Herring lateral pillar classification is widely used for the classification of Legg-Calvé-Perthes disease, but is not applied at the early stage of Legg-Calvé-Perthes disease because it is typically applied at the late fragmentation stage. The purpose of this study was to investigate the correlation between the early appearance on magnetic resonance imaging of the acetabular labrum and lateral pillar involvement in Legg-Calvé-Perthes disease. METHODS: Non-contrast magnetic resonance images of 26 hips in 25 children with early-stage Legg-Calvé-Perthes disease were retrospectively reviewed...
November 17, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29153707/the-influence-of-muscle-activation-on-impact-dynamics-during-lateral-falls-on-the-hip
#10
Daniel R Martel, Iris C Levine, Steven P Pretty, Andrew C Laing
Muscle activation has been demonstrated to influence impact dynamics during scenarios including running, automotive impacts, and head impacts. This study investigated the effects of targeted muscle activation magnitude on impact dynamics during low energy falls on the hip with human volunteers. Fifteen university-aged participants (eight females, seven males) underwent 12 lateral pelvis release trials. Half of the trials were muscle-'relaxed'; in the remaining 'contracted' trials participants isometrically contracted their gluteus medius to 20-30% of maximal voluntary contraction before the drop was initiated onto a force plate...
November 10, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29151520/dropped-head-syndrome-and-the-presence-of-rimmed-vacuoles-in-a-muscle-biopsy-in-scleroderma-polymyositis-overlap-syndrome-associated-with-anti-ku-antibody
#11
Yoshida Takeshi, Yoshida Mai, Mitsuyo Kinjo, Jonosono Manabu, Higuchi Itsuro
A 66-year-old woman with a history of interstitial lung disease presented with a 3-month history of dropped head syndrome (DHS), followed by camptocormia and extremity weakness. A clinical examination revealed Raynaud phenomenon, arthralgia, distal skin sclerosis, and microbleeds in the nailfold capillaries. An anti-Ku antibody test was positive. A muscle biopsy revealed inflammatory myopathy with rimmed vacuoles (RVs). The diagnosis of scleroderma-polymyositis (SSc-PM) overlap syndrome was made. RVs on a muscle biopsy in a patient with inflammatory myositis involving axial muscles may be seen either in inclusion body myositis or SSc-PM overlap syndrome...
November 20, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29149385/pre-clinical-models-in-pediatric-traumatic-brain-injury-challenges-and-lessons-learned
#12
REVIEW
Patrick M Kochanek, Jessica S Wallisch, Hülya Bayır, Robert S B Clark
PURPOSE: Despite the enormity of the problem and the lack of new therapies, research in the pre-clinical arena specifically using pediatric traumatic brain injury (TBI) models is limited. In this review, some of the key models addressing both the age spectrum of pediatric TBI and its unique injury mechanisms will be highlighted. Four topics will be addressed, namely, (1) unique facets of the developing brain important to TBI model development, (2) a description of some of the most commonly used pre-clinical models of severe pediatric TBI including work in both rodents and large animals, (3) a description of the pediatric models of mild TBI and repetitive mild TBI that are relatively new, and finally (4) a discussion of challenges, gaps, and potential future directions to further advance work in pediatric TBI models...
October 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29140832/platelet-function-changes-in-a-time-dependent-manner-following-traumatic-brain-injury-in-a-murine-model
#13
Grace E Martin, Brent Xia, Young Kim, Mark D Johnson, Rosalie Veile, Lou Ann Friend, Amy T Makley, Charles C Caldwell, Michael D Goodman
Traumatic brain injury (TBI) results in systemic changes in coagulation and inflammation that contribute to post-traumatic morbidity and mortality. The potential interaction of platelets and pro-inflammatory cytokines in the modulation of coagulation, microthrombosis, and venous thromboembolic events after moderate TBI (TBI) has not been determined. Using a murine model, we hypothesized 1) that the degree of platelet-induced coagulation varies depending on the platelet aggregation agonist 2) platelet-induced coagulation changes in a time-dependent manner following TBI, and 3) changes in platelet-induced coagulation are mirrored by changes in the levels of circulating pro-inflammatory cytokines...
November 14, 2017: Shock
https://www.readbyqxmd.com/read/29123351/the-effect-of-aromatherapy-with-the-essential-oil-of-orange-on-pain-and-vital-signs-of-patients-with-fractured-limbs-admitted-to-the-emergency-ward-a-randomized-clinical-trial
#14
Davood Hekmatpou, Yasaman Pourandish, Pouran Varvani Farahani, Ramin Parvizrad
Background and Objective: Pain is an emotional and unpleasant experience associated with actual or potential tissue damage. The literature shows no study on the effect of aromatherapy with the essential oil of orange on unpleasant feelings of patients with fractured limbs. In this regard, this paper aims at studying the effect of aromatherapy with the essential oil of orange on patients with fractured limbs admitted to the emergency ward. Methods: Sixty patients admitted to the emergency ward of Vali-e-Asr Hospital were selected by purposive sampling method and then were divided into two groups of control and experiment by block method...
October 2017: Indian Journal of Palliative Care
https://www.readbyqxmd.com/read/29103927/three-dimensional-gait-analysis-reveals-dynamic-alignment-change-in-a-patient-with-dropped-head-syndrome-a-case-report
#15
Kousei Miura, Hideki Kadone, Masao Koda, Hiroshi Kumagai, Katsuya Nagashima, Kengo Fujii, Hiroshi Noguchi, Toru Funayama, Tetsuya Abe, Takeo Furuya, Masashi Yamazaki
Dropped head syndrome (DHS) is a cervical kyphotic deformity caused by apparent weakness of the neck extensor muscles. We often encounter patients whose symptoms, including impaired forward vision and neck pain, deteriorate while walking. This is the first report of a case of dynamic spinal alignment change in a patient with DHS during walking using three-dimensional gait analysis. A 78-year-old Japanese woman complained of impaired forward vision and neck pain while walking. Her radiograph showed severe cervical kyphosis...
November 3, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29044061/long-term-scanning-laser-ophthalmoscopy-and-perimetry-in-different-severities-of-primary-open-and-chronic-angle-closure-glaucoma-eyes
#16
Ramanjit Sihota, Aparna Rao, Geetha Srinivasan, Viney Gupta, Ajay Sharma, Tanuj Dada, M Kalaiwani
PURPOSE: To determine rate of change over time on scanning laser ophthalmoscopy, HRT, compared to perimetry, and to determine incidence, parametric changes, and risk factors for progression in primary open angle glaucoma (POAG) and chronic primary angle closure angle glaucoma (CPACG) eyes. METHODS: Prospective clinical study of 116 POAG eyes and 129 CPACG eyes of different severities of glaucoma. Standard automated perimetry and optic nerve head topography were studied at baseline and thereafter every 6 months...
October 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29030727/-parenteral-nutrition-in-premature-babies-with-a-birth-weight-1500g-a%C3%A2-systematic-single-center-analysis-and-comparison-with-current-guidelines
#17
Melanie Sirch, Martin Poryo, Mona Butte, Ulrike Lindner, Ludwig Gortner, Michael Zemlin, Holger Nunold, Sascha Meyer
BACKGROUND: Parenteral and enteral nutrition are essential for both growth and development of preterm infants. Based on the results of many studies, the rate of nutritional growth and the amount of substrate delivered parenterally are under debate. OBJECTIVE: The main aim of this study was to assess parenteral nutrition in very and extremely immature preterm infants, i.e. very low birth weight (VLBW, birth weight <1500g) and extremely low birth weight (ELBW, birth weight <1000g) neonates, and to compare the amount of parenterally delivered substrate in our neonatal intensive care unit (NICU) to current German guidelines...
October 13, 2017: Wiener Medizinische Wochenschrift
https://www.readbyqxmd.com/read/29018508/gait-improvements-after-peroneal-or-tibial-nerve-transfer-in-patients-with-foot-drop-a-retrospective-study
#18
Rahul K Nath, Chandra Somasundaram
Background: Injury to the common peroneal nerve disrupts the motor control pathway to ankle dorsiflexors and evertors, as well as toe extensors, resulting in pathological gait and foot drop. Direct external compression on the fibular head is the most frequent cause of peroneal nerve impairment and has poor prognosis. Methods and Patients: Here, we report the surgical outcome of 21 patients with foot drop (9 males and 12 females) who underwent nerve transfer procedure of either the superficial peroneal nerve or the tibial nerve fascicles to the motor branch of the tibialis anterior and to the deep peroneal nerve...
2017: Eplasty
https://www.readbyqxmd.com/read/29018402/preferential-impairment-of-the-contralesional-posterior-semicircular-canal-in-internuclear-ophthalmoplegia
#19
Seung-Han Lee, Sang-Hoon Kim, Sung-Sik Kim, Kyung Wook Kang, Alexander Andrea Tarnutzer
BACKGROUND: The vertical vestibulo-ocular reflex (VOR) may be impaired in internuclear ophthalmoplegia (INO) as the medial longitudinal fasciculus (MLF) conveys VOR-signals from the vertical semicircular canals. It has been proposed that signals from the contralesional posterior semicircular canal (PSC) are exclusively transmitted through the MLF, while for the contralesional anterior canal other pathways exist. OBJECTIVE: Here, we aimed to characterize dysfunction in individual canals in INO-patients using the video-head-impulse test (vHIT) and to test the hypothesis of dissociated vertical canal impairment in INO...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28988978/isolated-neck-extensor-myopathy-a-case-presentation-of-rapid%C3%A2-onset-and-spontaneous-recovery
#20
Anish Mirchandani, Allen Chen
Patients presenting with a chin-on-chest deformity, or dropped head syndrome, may have a diagnosis of isolated neck extensor myopathy (INEM). INEM is a diagnosis of exclusion occurring primarily in elderly patients. INEM usually has a benign progression, which may involve the shoulder girdle but does not advance to other muscle groups. Patients without an inflammatory etiology typically experience minimal or no recovery of their symptoms. Dropped head syndrome has various implications on a patient's quality of life and activities of daily living...
October 6, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
keyword
keyword
91890
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"