Arachnoid Trabeculae and CSF Roles in Blunt Head Impacts

2003 ◽  
Author(s):  
M. Zoghi-Moghadam ◽  
Ali Sadegh ◽  
Charles Watkins
Keyword(s):  
Cerebrospinal Fluid ◽  
Relative Motion ◽  
Brain Injuries ◽  
Shear Stresses ◽  
Two Dimensional ◽  
Global Models ◽  
Contact Sports ◽  
Head Impacts ◽  
The Brain

The blunt head impacts due to vehicular collisions, contact sports or falls cause relative motion between the brain and skull and an increase in contact and shear stresses in meningeal region. Several models have been developed to better understand brain injuries. In this study the mechanical role of the fibrous trabeculae and the Cerebrospinal Fluid (CSF) in Subarachnoid space (SAS) is investigated. Two-dimensional solid and fluid global models of the head and a local model of the SAS trabeculae were developed. The CSF pressure distribution and the trabeculae deformations were determined. It is concluded that the arachnoid trabeculae reduce the pressure in the CSF and both play a major role in damping the blunt head impact.

Biomechanics of Head/Brain Due to Angular Head Acceleration

2004 ◽  
Author(s):  
M. Zoghi-Moghadam ◽  
Ali M. Sadegh
Keyword(s):  
Cerebrospinal Fluid ◽  
Brain Injuries ◽  
Angular Acceleration ◽  
Shear Stresses ◽  
Head Acceleration ◽  
Global Models ◽  
Contact Sports ◽  
Blunt Impact ◽  
The Brain

In vehicular collisions, contact sports or falls, in addition to blunt impacts, head is subjected to high angular accelerations. This causes relative motion between the brain and skull and an increase in contact and shear stresses in meningeal region which leads to brain injuries. In our previous study Zoghi et al (14), the mechanical role of the fibrous trabeculae and the Cerebrospinal Fluid (CSF) in Subarachnoid space (SAS) were investigated. This is a continuation study of (14) where the attention is focused on the angular acceleration of head rather than blunt impacts. Improved 2-D solid and fluid global models of the head and a local model of the SAS trabeculae were developed. The CSF pressure distribution and the trabeculae deformations were determined. It is expected that in angular acceleration of head, similar to blunt impact, the arachnoid trabeculae reduce the pressure in the CSF and both play a major role in damping the acceleration.

Fibrinolytic Activity of Cerebro-Spinal Fluid and the Development of Artificial Cerebral Haematomas in Dogs

1969 ◽  
Vol 21 (02) ◽  
pp. 294-303 ◽  
Author(s):  
H Mihara ◽  
T Fujii ◽  
S Okamoto
Keyword(s):  
Cerebrospinal Fluid ◽  
Carboxylic Acid ◽  
Fibrinolytic Activity ◽  
Clinical Implications ◽  
Trans Form ◽  
Plate Method ◽  
Blood Samples ◽  
Fibrin Plate ◽  
The Brain

SummaryBlood was injected into the brains of dogs to produce artificial haematomas, and paraffin injected to produce intracerebral paraffin masses. Cerebrospinal fluid (CSF) and peripheral blood samples were withdrawn at regular intervals and their fibrinolytic activities estimated by the fibrin plate method. Trans-form aminomethylcyclohexane-carboxylic acid (t-AMCHA) was administered to some individuals. Genera] relationships were found between changes in CSF fibrinolytic activity, area of tissue damage and survival time. t-AMCHA was clearly beneficial to those animals given a programme of administration. Tissue activator was extracted from the brain tissue after death or sacrifice for haematoma examination. The possible role of tissue activator in relation to haematoma development, and clinical implications of the results, are discussed.

scholarly journals Role of Acupuncture in the Management of Severe Acquired Brain Injuries (sABIs)

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Loredana Cavalli ◽  
Lucia Briscese ◽  
Tiziana Cavalli ◽  
Paolo Andre ◽  
Maria Chiara Carboncini
Keyword(s):  
Brain Injuries ◽  
Neuronal Regeneration ◽  
Asian Countries ◽  
Rehabilitative Treatment ◽  
Beneficial Effects ◽  
Nervous System Activity ◽  
Neurologic Disorders ◽  
Central Nervous System Activity ◽  
The Brain

Acupuncture therapy has been used to treat several disorders in Asian countries and its use is increasing in Western countries as well. Current literature assessed the safety and efficacy of acupuncture in the acute management and rehabilitation of patients with neurologic disorders. In this paper, the role of acupuncture in the treatment of acute severe acquired brain injuries is described, acting on neuroinflammation, intracranial oedema, oxidative stress, and neuronal regeneration. Moreover, beneficial effects of acupuncture on subacute phase and chronic outcomes have been reported in controlling the imbalance of IGF-1 hormone and in decreasing spasticity, pain, and the incidence of neurovegetative crisis. Moreover, acupuncture may have a positive action on the arousal recovery. Further work is needed to understand the effects of specific acupoints on the brain. Allegedly concurrent neurophysiological measurements (e.g., EEG) may help in studying acupuncture-related changes in central nervous system activity and determining its potential as an add-on rehabilitative treatment for patients with consciousness disorders.

scholarly journals Diagnostic and Treatment Approaches Involving Transthyretin in Amyloidogenic Diseases

2019 ◽  
Vol 20 (12) ◽  
pp. 2982 ◽  
Author(s):  
Gil Yong Park ◽  
Angelo Jamerlan ◽  
Kyu Hwan Shim ◽  
Seong Soo A. An
Keyword(s):  
Cerebrospinal Fluid ◽  
Genetic Mutations ◽  
Hormone Binding ◽  
Wild Type ◽  
Autonomic Motor ◽  
Hormone Binding Protein ◽  
The Brain ◽  
Tetrameric Form

Transthyretin (TTR) is a thyroid hormone-binding protein which transports thyroxine from the bloodstream to the brain. The structural stability of TTR in tetrameric form is crucial for maintaining its original functions in blood or cerebrospinal fluid (CSF). The altered structure of TTR due to genetic mutations or its deposits due to aggregation could cause several deadly diseases such as cardiomyopathy and neuropathy in autonomic, motor, and sensory systems. The early diagnoses for hereditary amyloid TTR with cardiomyopathy (ATTR-CM) and wild-type amyloid TTR (ATTRwt) amyloidosis, which result from amyloid TTR (ATTR) deposition, are difficult to distinguish due to the close similarities of symptoms. Thus, many researchers investigated the role of ATTR as a biomarker, especially its potential for differential diagnosis due to its varying pathogenic involvement in hereditary ATTR-CM and ATTRwt amyloidosis. As a result, the detection of ATTR became valuable in the diagnosis and determination of the best course of treatment for ATTR amyloidoses. Assessing the extent of ATTR deposition and genetic analysis could help in determining disease progression, and thus survival rate could be improved following the determination of the appropriate course of treatment for the patient. Here, the perspectives of ATTR in various diseases were presented.

scholarly journals Expression and possible role of creatine transporter in the brain and at the blood-cerebrospinal fluid barrier as a transporting protein of guanidinoacetate, an endogenous convulsant

2008 ◽  
Vol 107 (3) ◽  
pp. 768-778 ◽  
Author(s):  
Masanori Tachikawa ◽  
Jun Fujinawa ◽  
Masato Takahashi ◽  
Yasuyuki Kasai ◽  
Masahiro Fukaya ◽  
...  
Keyword(s):  
Cerebrospinal Fluid ◽  
Creatine Transporter ◽  
The Brain

scholarly journals Dynamics of Choline-Containing Phospholipids in Traumatic Brain Injury and Associated Comorbidities

2021 ◽  
Vol 22 (21) ◽  
pp. 11313
Author(s):  
Sana Javaid ◽  
Talha Farooq ◽  
Zohabia Rehman ◽  
Ammara Afzal ◽  
Waseem Ashraf ◽  
...  
Keyword(s):  
Molecular Mechanisms ◽  
Brain Injuries ◽  
Structural Integrity ◽  
Preclinical Studies ◽  
Neuronal Transmission ◽  
Expanding Population ◽  
Motorized Vehicles ◽  
The Brain ◽  
And Oxidative Stress

The incidences of traumatic brain injuries (TBIs) are increasing globally because of expanding population and increased dependencies on motorized vehicles and machines. This has resulted in increased socio-economic burden on the healthcare system, as TBIs are often associated with mental and physical morbidities with lifelong dependencies, and have severely limited therapeutic options. There is an emerging need to identify the molecular mechanisms orchestrating these injuries to life-long neurodegenerative disease and a therapeutic strategy to counter them. This review highlights the dynamics and role of choline-containing phospholipids during TBIs and how they can be used to evaluate the severity of injuries and later targeted to mitigate neuro-degradation, based on clinical and preclinical studies. Choline-based phospholipids are involved in maintaining the structural integrity of the neuronal/glial cell membranes and are simultaneously the essential component of various biochemical pathways, such as cholinergic neuronal transmission in the brain. Choline or its metabolite levels increase during acute and chronic phases of TBI because of excitotoxicity, ischemia and oxidative stress; this can serve as useful biomarker to predict the severity and prognosis of TBIs. Moreover, the effect of choline-replenishing agents as a post-TBI management strategy has been reviewed in clinical and preclinical studies. Overall, this review determines the theranostic potential of choline phospholipids and provides new insights in the management of TBI.

scholarly journals Role of Neurosonography in evaluation of brain abnormalities in neonates

2021 ◽  
Vol 9 (1) ◽  
pp. 26-30
Author(s):  
Vishwanath Reddy
Keyword(s):  
Cerebral Edema ◽  
Brain Injuries ◽  
Periventricular Leukomalacia ◽  
Brain Abnormalities ◽  
Germinal Matrix ◽  
Congenital Lesions ◽  
High Incidence ◽  
The Brain

Background: Brain damage in preterm infants may result from a series of eventsrather than one specific insult. Maturational characteristics with a failingadaptation capacity may predispose the brain to harmful events during bothintrauterine and extrauterine life. The study aimed to detect anomalies in the brain of neonates with neurosonography. Methods : the studywas conducted on patients with clinically suspected lesions in the brain, undergoing NSG for evaluation of brain abnormalities in Prathima Institute ofmedical sciences, Karimnagar.Neurosonographic examinations were performed through anteriorfontanelle in both the coronal and sagittal planes.The examination started in the coronal plane along the coronal suture, with a transducer angled towards the frontal region. Then brain was examined invarious coronal planes by sweeping the transducer from anterior to posterior. Results : The most common abnormality found on neurosonogram in 3 – 5 days was germinal- matrix haemorrahge comprising n=13 (31%) followed by PVL n=12 (28.6%), cyst n=5 (11.9%), flaring n=5 (11.9%), cerebral edema n=4 (9.5%), congenital lesions n=2 (4.8%) and infections n=1 (2.4%). Follow up scan was performed around 2nd week of life, n=24 (57.1%) neonates were showing normal neurosonogram findings, remaining 18 (43%) showing abnormal findings, which are PVL n=6 (14.3%), GMH n=9 (21.4%), cyst n=1(2.4%), cerebral edema n=1 (2.4%) and congenital lesions n=1 (2.4%). Conclusion: High incidence of brain injuries was detected in babies born less than 32 weeks of gestation, weighing less than 1500 gm. The commonest clinical presentation was seizures followed by absent suckling and lethargy. The abnormalities found on the neurosonogram in our study were germinal matrix hemorrhage, periventricular leukomalacia, cystic PVL, corpus callosum agenesis, and TORCH infection.The mortality rate was high in grade III and grade IV GMH.10-14 days followup scan detected new cases of cystic PVL which were not diagnosed in the initial scan

scholarly journals Violation in the axis of the "microbiota of the digestive tract-brain" under conditions of ischemia-reperfusion of the brain (literature review)

2021 ◽  
Vol 11 (5) ◽  
pp. 325-332
Author(s):  
O. Tkachuk ◽  
S. Tkachuk ◽  
M. Povar ◽  
O. Denysenko ◽  
V. Shtefaniuk
Keyword(s):  
Literature Review ◽  
Intestinal Microbiota ◽  
Brain Injuries ◽  
Ischemia Reperfusion ◽  
T Cell Homeostasis ◽  
Ischemic Brain ◽  
Intestinal Lymphocytes ◽  
And Migration ◽  
The Brain

The aim of the study is to analyze current views concerning interrelations between the state of intestinal microbiota and the course of ischemic-reperfusion brain injury.   Conclusion. Literary data are indicative of disputable scientific opinions existing nowadays concerning the role of dysbacteriosis (neuroprotective or neurodegenerative) in the course of ischemic brain injuries. Meanwhile, the studies are in common concerning the evidenced role of the intestinal microbiota in disturbances of T-cell homeostasis, ratio changes of their Treg-Th17 subpopulations, and migration of intestinal lymphocytes to the ischemic brain.  

An Automated Kinematic Measurement System for Sagittal Plane Murine Head Impacts

2020 ◽  
Vol 142 (8) ◽  
Author(s):  
Kurt A. McInnes ◽  
Zelalem A. Abebe ◽  
Thomas Whyte ◽  
Asma Bashir ◽  
Carlos Barron ◽  
...  
Keyword(s):  
High Speed ◽  
Brain Injuries ◽  
Sagittal Plane ◽  
Tracking System ◽  
Head Impact ◽  
Percentage Error ◽  
Head Tracking ◽  
Rigid Fixation ◽  
Head Impacts ◽  
The Brain

Abstract Mild traumatic brain injuries are typically caused by nonpenetrating head impacts that accelerate the skull and result in deformation of the brain within the skull. The shear and compressive strains caused by these deformations damage neural and vascular structures and impair their function. Accurate head acceleration measurements are necessary to define the nature of the insult to the brain. A novel murine head tracking system was developed to improve the accuracy and efficiency of kinematic measurements obtained with high-speed videography. A three-dimensional (3D)-printed marker carrier was designed for rigid fixation to the upper jaw and incisors with an elastic strap around the snout. The system was evaluated by impacting cadaveric mice with the closed head impact model of engineered rotational acceleration (CHIMERA) system using an energy of 0.7 J (5.29 m/s). We compared the performance of the head-marker system to the previously used skin-tracking method and documented significant improvements in measurement repeatability (aggregate coefficient of variation (CV) within raters from 15.8 to 1.5 and between raters from 15.5 to 1.5), agreement (aggregate percentage error from 24.9 to 8.7), and temporal response (aggregate temporal curve agreement from 0.668 to 0.941). Additionally, the new system allows for automated software tracking, which dramatically decreases the analysis time required (74% reduction). This novel head tracking system for mice offers an efficient, reliable, and real-time method to measure head kinematics during high-speed impacts using CHIMERA or other rodent or small mammal head impact models.

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