PubMed Journals Articles About "Effect Of Head Rotation On Overlap And Relative Position Of Internal Jugular Vein To Carotid Artery In Infants And Children: A Study Of The Anatomy Using Ultrasonography" RSS

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Effect Of Head Rotation On Overlap And Relative Position Of Internal Jugular Vein To Carotid Artery In Infants And Children: A Study Of The Anatomy Using Ultrasonography PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Effect Of Head Rotation On Overlap And Relative Position Of Internal Jugular Vein To Carotid Artery In Infants And Children: A Study Of The Anatomy Using Ultrasonography articles that have been published worldwide.

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Showing "Effect Head Rotation Overlap Relative Position Internal Jugular" PubMed Articles 1–25 of 35,000+

Ansa cervicalis - a new classification approach.

Normally, the inferior root of Ansa cervicalis passes around the internal jugular vein and runs in an anterior direction to meet the superior root ventral to the common carotid artery. However, anatomical variants of the Ansa cervicalis are as yet not well investigated and understood. To close this gap the present study was undertaken. The Ansa cervicalis was examined in 54 human formalin-fixed cadavers and preparations of the head and neck by conventional dissection. In 66% of the specimens the Ansa cervic...

Jug Handle Tributary of Internal Jugular Vein: A Potentially Dangerous Venous Variation.

Variations of internal jugular vein (IJV) are rare and are surgically important. Here an unreported variation of IJV is presented. Right IJV had an unusual vein joining it in the form of a "jug handle." This vein arose from the junction of IJV and common facial vein (CFV), coursed down for 3 cm and joined IJV again. The CFV was dilated. Knowledge of this rare case could be useful to craniofacial surgeons, radiologists, and anesthesiologists. It might decrease the chances of iatrogenic bleeding during head...

Anatomical relationship between carotid artery and styloid and hyoid bones in patients showing unintended head rotation on CTA.

Styloid process length and styloid/hyoid bone proximity to the internal carotid artery (ICA) have been implicated in certain carotid pathologies (e.g. carotid artery dissection). Neck movement or trauma may contribute to some of these carotid pathologies. Styloid/hyoid bone to ICA distances have never been systematically analyzed in regard to head rotation and head flexion-extension. We studied axial slices on computed tomography angiograms of 103 nondissection patients showing > 1° head rotation. We m...

Investigating the Time-lapsed Effects of Rigid Cervical Collars on the Dimensions of the Internal Jugular Vein.

Protocol advocates the use of rigid cervical collars (RCCs) in head trauma patients as they are at risk of concomitant cervical spine injury. Literature has shown RCCs to be a potential cause of venous outflow obstruction, changing internal jugular vein (IJV) cross-sectional area (CSA), and raising intracranial pressure (ICP). This study aims to investigate the effects of applying a RCC, for a period of four hours, on the dimensions of the IJV, in healthy participants.

The influence of horizontal cephalic rotation on the deviation of mandibular position.

When performing an occlusal procedure, it is recommended that the patient should be sitting straight with the head in a natural position. An inappropriate mandibular position caused by an incorrect occlusal record registration or occlusal adjustment can result in damaged teeth and cause functional disorders in muscles and temporomandibular joints. The purpose of this study was to clarify the influence of horizontal cephalic rotation on mandibular position by investigating the three-dimensional positions of ...

Conformational Effect on the Large Amplitude Motions of 3,4-Dimethylanisole Explored by Microwave Spectroscopy.

The microwave spectrum of 3,4-dimethylanisole, a molecule containing three methyl groups allowing for internal rotation, was recorded using a pulsed molecular jet Fourier transform microwave spectrometer operating in the frequency range from 2.0 to 26.5 GHz. Quantum chemical calculations yielded two conformers with a trans and a cis configuration of the methoxy group, both of which were assigned in the experimental spectrum. Torsional splittings due to the internal rotations of two methyl groups attached to...

Surgical resection of carotid-jugular arteriovenous fistula after multiple failed embolisation.

Carotid-jugular fistula is a rare presentation of arteriovenous fistula. A case of a 60-year-old Chinese man who presented with iatrogenic carotid-jugular fistula with multiple fistulous points was reported. His presenting complaint was a gradually enlarging right pulsatile neck mass complicated by worsening symptoms of congestive cardiac failure. He had recent mitral valve annuloplasty, and a right internal jugular central venous pressure monitor insertion was performed then. Angiography revealed right car...

Anatomy Revisited: Hemodialysis Catheter Malposition into the Chest.

In most situations, central catheters are implanted in the right jugular vein as initial access for hemodialysis. However, after repeated punctures, the proximal vessels become stenosed and thrombosed and misplacement is likely to occur. Correct catheter position in the vein can be easily ascertained with X-ray or cross-sectional CT imaging. In this report, we describe the case of a 77-year-old patient on chronic hemodialysis via catheter due to arteriovenous fistula dysfunction. We placed a cuffed-tunneled...

The effect of the Majestro-Frost procedure on internal hip rotation during gait in patients with cerebral palsy.

Muscle imbalance is related to persistent internal hip rotation (IHR) after femoral derotation osteotomy (FDO) in cerebral palsy (CP). The aim of this study was to evaluate the effect of the Majestro-Frost soft tissue procedure (MFP), which potentially addresses muscle imbalance, on IHR in CP patients during walking.

Where is your head? Perception of relative position of the head on a wielded object.

Perception of exteroceptive properties (e.g., object length) by effortful or dynamic touch is both task-specific and anatomically independent. We investigate whether task-specificity and anatomical independence generalize to perception of proexteroceptive properties of the person-object system (i.e., relative position of the body on a wielded object). Moreover, we do so when objects are wielded by a body part that is unlikely to be well practiced in such tasks-the head. Experiment 1 found that participants ...

Detection of the focal spot motion relative to the collimator axis of a linear accelerator under gantry rotation.

The potential for delivering high precision radiotherapy using linear accelerators (linacs) has been improved with the development of digital x-ray electronic portal imaging devices (EPID) for acquiring kilovoltage (kV) cone-beam CT and megavoltage (MV) images for patient positioning. EPIDs have also opened the possibilities of developing novel quality assurance and insight into radiotherapy equipment performance. The aim of this work was to measure the offset of the focal spot position (FSP) of a lina...

Saccular Aneurysm of the Internal Jugular Vein in an Adult Patient and Its Surgical Treatment.

Congenital jugular vein aneurysm in an adult patient is a rare condition.

Effect of Femoral Antetorsion on Tibiofemoral Translation and Rotation in the Anterior Cruciate Ligament Deficient Knee.

We aimed to investigate how increased or decreased femoral antetorsion would affect the biomechanics of the knee in an anterior cruciate ligament (ACL)-deficient cadaveric model. We hypothesized that external or internal rotation of the distal femur, achieved through a femoral osteotomy, would affect the magnitude of tibiofemoral translation and rotation. Navigated measurements of tibiofemoral translation and rotation during the anterior drawer, Lachman, and pivot shift tests were performed on six whole-bod...

Which Type of Temporary Hemodialysis Catheter to Be Used for the Right Internal Jugular Vein? Prospective Observational Study of Straight vs Precurved Caths.

Weak evidence is present for choosing amongst different temporary hemodialysis catheter (THC) designs with regards to the risk of venous thrombosis, therefore two THC designs for the right internal jugular vein (RIJV) were compared.

Effect of preparation design on marginal and internal adaptation of translucent zirconia laminate veneers.

This study investigated the effect of preparation design on the marginal and internal adaptation of laminate veneers (LVs) fabricated from translucent zirconia. Thirty-three resin teeth were prepared for LVs of three designs: window preparation (WP); incisal shoulder preparation (ISP); and incisal palatal chamfer preparation (IPP). Marginal adaptation was evaluated by measuring the vertical discrepancy between the LV margin and the finish line at 60 points. The internal adaptation was assessed by measuring ...

Dependency of head impact rotation on head-neck positioning and soft tissue forces.

Humans are susceptible to traumatic brain injuries from rapid head rotations that shear and stretch the brain tissue. Conversely, animals such as woodpeckers intentionally undergo repetitive head impacts without apparent injury. Here, we represent the head as the end-effector of a rigid linkage cervical spine model to quantify how head angular accelerations are affected by the linkage positioning (head-neck configuration) and the soft tissue properties (muscles, ligaments, tendons).

Head and Trunk Movements During Turning Gait in Children with Cerebral Palsy.

Thirty children with cerebral palsy (CP) and 22 typical developing (TD) were tested with 3D-gait analysis. At turning, trunk rotation was larger in CP2 (GMFCS II) than in TD and CP1 (GMFCS I), and head flexion was larger in CP3 (GMFCS III) than TD. Maximum head and trunk flexion values during the entire trial were larger in CP3 than in the other groups, and trunk flexion was larger in CP2 than in TD. Trial time increased with GMFCS-level. Less trunk rotation than TD and CP1 reflects spatial insecurity in CP...

Motor Imagery in children with DCD: a systematic and meta-analytic review of hand-rotation task performance.

This is the first review to quantitatively summarise evidence evaluating MI functioning in children with DCD compared to controls, based on the hand rotation task (HRT). Specifically, MI performance was assessed using three different behavioural performance measures on the HRT (i.e., reaction time, accuracy and efficiency). Eight studies were included for quantitative analysis, yielding data for 176 and 198 children with and without DCD respectively. While children with DCD consistently used MI across all m...

Targeting head movements in humans: Compensation for disturbance from simultaneous body rotations.

Vestibular information plays an important role in spatially oriented motor control and perception. With regard to reorienting head movements, little is known of (1) how vestibular mechanisms compensate for disturbances from concurrent passive trunk rotations (e.g. in a veering vehicle), and (2) whether and how this disturbance compensation is related to the perception of body orientation in space. We here address these two questions in a single experiment. Six healthy subjects (Ss) seated on a turning chair...

Pathophysiology, diagnosis and management of occiput posterior presentation during labor.

Persistant occiput posterior (OP) positions are the commonest malpresentations of the fetal head during labor and their diagnosis remains challenging. They are associated to prolonged second stage of labor, prolonged expulsive efforts, labor augmentation, cesarean sections and instrumental deliveries. On the maternal side, severe perineal tears, post-partum hemorrhage or chorioamnionitis are more frequent. Currently, prevention of persistent OP positions is based on the maintain of precise maternal position...

Effect of Increased Scapular Internal Rotation on Glenohumeral External Rotation and Elbow Valgus Load in the Late Cocking Phase of Throwing Motion.

Scapular dyskinesis among throwers is thought to affect kinetic chain function and increase the load demands on the shoulder and/or elbow. However, the biomechanical relationship between scapular orientation and elbow valgus load, which is associated with ulnar collateral ligament (UCL) injury, has not been determined.

Humeral retroversion and shoulder muscle changes in infants with internal rotation contractures following brachial plexus birth palsy.

To examine humeral retroversion in infants who sustained brachial plexus birth palsy (BPBI) and suffered from an internal rotation contracture. Additionally, the role of the infraspinatus (IS) and subscapularis (SSc) muscles in the genesis of this bony deformation is explored.

Small, but oh my! Head morphology of adult Aleuropteryx spp. and effects of miniaturization (Insecta: Neuroptera: Coniopterygidae).

We present the first morphological study of the internal head structures of adults of the coniopterygid genus Aleuropteryx, which belong to the smallest known lacewings. The head is ventrally closed with a gula, which is unique in adult Neuroptera and otherwise developed in Megaloptera, the sister group of Neuroptera. The dorsal tentorial arms are directed posteriorly and fused, forming an arch that fulfills functions otherwise taken by the tentorial bridge. A newly found maxillary gland is present in both ...

Both the Observer's Expertise and the Subject's Facial Symmetry Can Affect Anatomical Position of the Head.

It is easier to judge facial deformity when the patient's head is in anatomic position. The purposes of this study were to determine 1) whether a group of expert observers would agree more than a group of nonexperts on what is the correct anatomic position of the head, 2) whether there would be more variation in the alignment of an asymmetrical face compared with a symmetrical one, and 3) whether the alignments of experts would be more repeatable than those of nonexperts.

SGaze: A Data-Driven Eye-Head Coordination Model for Realtime Gaze Prediction.

We present a novel, data-driven eye-head coordination model that can be used for realtime gaze prediction for immersive HMD-based applications without any external hardware or eye tracker. Our model (SGaze) is computed by generating a large dataset that corresponds to different users navigating in virtual worlds with different lighting conditions. We perform statistical analysis on the recorded data and observe a linear correlation between gaze positions and head rotation angular velocities. We also find th...

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