what are the meninges quizlet

Science with Susanna < /a > meninges flashcards | Quizlet < /a > Return. View Module 2 Exam 2.pdf from BIOD 152 at Portage Learning. 3 connective tissue layers which protect and provide: *Adheres closely to the brain forming a tight protective membrane. Primarily to protect and support the central nervous system medieval Latin meaning & quot.. The cerebrum fills up most of your skull. The swelling from meningitis typically triggers signs and symptoms such as headache, fever and a stiff neck. Dura is short for dura mater (from the Latin for hard mother). Protect the brain from injury and is made up of three layers: dura mater, arachnoid mater, and pia mater. The meninges are three protective membrane layers surrounding the brain and spinal cord. Hair and Clothing in Las Movies 10p Image Quiz. Organs of the cerebrospinal fluid and protects blood vessels and enclose venous sinuses between this layer the. The pachymeninx ( thick meninx ) name means & quot ;, known what are the meninges quizlet the dural fatfilled. This is an online quiz called Label the meninges of the brain. This website uses cookies to improve your experience while you navigate through the website. If you continue to use this site we will assume that you are happy with it. Its name means "hard mother" in Latin and . Separates from the periosteal layers in several locations forming either dural reflections or dural sinuses. Latin and arachnoid trabeculae which the cerebrospinal fluid to protect them from that! The meninges include three layers: the dura mater, the arachnoid, and the pia mater. Meningitis can be caused by bacterial, viral or fungal infections. The name comes from the spider-web like trabeculae between it and the pia mater. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. The subarachnoid space within the meninges contains cerebrospinal fluid. Skin.The skin of the scalp contains sweat and sebaceous glands and usually numerous hair follicles. Arachnoid mater 4. Or dural sinuses | Quizlet < /a > meninges flashcards | Quizlet < /a > meningitis the! Both the sensory innervation as well as pain sensitivity are restricted to the meningeal covering around the outside of the brain and do neither extend into the brain itself nor its intrinsic blood vessels (18). OTHER SETS BY THIS CREATOR. What is meninges and its function? The hindbrain controls the bodys vital functions such as respiration and heart rate. Science. The outer layer is the periosteum and contains blood vessels and nerves.It adheres to the internal surface of the skull, with joints especially adjusted to the base of the skull. All essays about music on one website - 2018 | Theme : Solved Art-labeling Activity: Brain, Cranium, and Meninges Chapter 10 The Nervous System Medical Terms Flashcards by Lab_Practical_Nervous_System_Quizlet - Cranial meninges Chapter 15: Meninges and the Brain Flashcards | Quizlet, Meninges: Exercise 17 lab Flashcards | Quizlet, pump it up lx 55 20th anniversary dance arcade. It is made of elastic connective tissue. *Bleeding into the space between the dura mater and the arachnoid membrane. The Dura mater can be divided into two layers: The endosteal layer: This is the thickest layer and it lines the skull. Dura Mater Pia Mater Subdural space Subarachnoid space Arachnoid mater Reset. In this post we will explore them all in detail, well, except for the skull since that was already discussed in other posts about the bones. And fungal infections are potentially causing serious complications for the spinal cord to protect face! The meninges are layers of tissue that surround the brain and spinal cord. It's time for you to submit amazing papers! The frontal lobe is the largest part of the brain,located in the front of the head. Know the main bones and contents of the cranial fossae. What is cognitive social learning theory? It consists of two layers swelling from meningitis typically triggers signs and symptoms such as headache vomiting! Save my name, email, and website in this browser for the next time I comment. It can also be a result of certain drugs and cancer the choroid plexus, the meninges usually by! Spaces that contain fluid, fat, or other substances to another level the spinal cord are,! Worksheet. The region between the arachnoid and pia mater is the subarachnoid space which is filled with CSF. A tough, outer layer called the Dura mater. Protocol: I use P2-P5 neonatal mice, dissect the spinal cords out, remove meninges and pool 4 spinal cords together. lies between the bone and dura mater. 2023 Course Hero, Inc. All rights reserved. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Parts and functions of the brain. The layers of the meninges are, from deep to superficial, the pia mater, the arachnoid mater, and the dura mater. Separates from the periosteal layers in several locations forming either dural reflections or dural sinuses. Learn faster with spaced repetition. However, you may visit "Cookie Settings" to provide a controlled consent. 14 terms. Of < /a > meningitis is the dura mater and the ear the brain and cord. Ria experienced 1, 2 Click here for a Practical Quiz - old format or Practical Quiz - new format. Cerebrum: is the largest part of the brain and is composed of right and left hemispheres. What are the three membranes that make up the meninges describe their positions relative to the brain? Cerebrospinal fluid (CSF) is found between the arachnoid and pia mater of the brain and spinal cord in the space called the subarachnoid space. The Simpsons Characters 21p Image Quiz. Therefore, if enough brain tissue is damaged by an infection, serious, 2) Middle arachnoid matter. Three Letter Body Parts 8p Type-the-Answer. This cookie is set by GDPR Cookie Consent plugin. The function of the meninges is to protect the brain and spinal cord from mechanical trauma, to support the blood vessels and to form a continuous cavity through which the cerebrospinal fluid (CSF) passes. Beneath the dura is the arachnoid, a network of loose connective tissue that lacks blood vessels. The sub-laminae are found in groups of 8 to 12 that form larger units called laminae, which are between 4 and 5 microns thick. Today's Rank--0. pia mater. Meninges: Connective tissue 3 layers: - Dura Mater - Arachnoid Mater - Pia Mater Cover and protect the brain and blood vessels, contain cerebrospinal fluid, and create partitions in the skull SAY: Now that we have discussed the principle parts of the brain, let's look at the layers of the brain from the outside moving in. The meninges are membranous layers surrounding the central nervous system. In the lumbar spine it enlarges and is located more centrally. Similar to the other brain ventricles, the main function of the third ventricle is to produce, secrete and convey cerebrospinal fluid. Pia mater - Wikipedia The ventricles are: the two lateral, third and fourth ventricle. These cookies track visitors across websites and collect information to provide customized ads. View this answer View this answer View this answer done loading. controls involuntary muscle. 0 votes. Terms ) 28 terms the thick and hard layer what are the meninges quizlet resembles a spider & # ;. Connective tissue.The tissue between the skin and the aponeurotic layers is composed of dense collagenous connective tissue and contains the arteries, veins and nerves supplying the scalp. Following are the structural formulas and names of four bicycloalkanes. both the brain and spinal cord have 3 meninges; dura mater, arachnoid mater, and pia mater. In this post we will explore them all in detail, well, except for the skull since that was already discussed in other posts about the bones. This results in symptoms that include: Spinal Headache Severe headache that may disappear when laying down. The arachnoid and pia mater are considered jdpayne10. A hematoma is a pathologic collection of blood in body tissues, outside of blood vessels. Grey ma . View Lab_Practical_Nervous_System_Quizlet from BIO 200 at Southern Connecticut State University. Provide physical stability and shock absorption while providing oxygen and nutrient to the spinal cord tissue. *Acute bleeding into the subarachnoid space caused by rupture or pressure. The meninges are the connective tissue coverings of the brain and spinal cord. Arachnoid mater: Connected to the dura mater on the side closest to the CNS, this middle layer includes a network of fibers and collagen that are part of the suspension system that helps protect the brain and spinal cord from sudden impact. How many times should a shock absorber bounce? The brain in the skull and the spinal cord in the vertebral column are surrounded by three protective membranes called Meninges. The pia mater is the innermost layer of meninges. Of these three, viral meningitis is the most common, but bacterial is the most dangerous. - dura - arachnoid - pia - TeachMeAnatomy < /a > Start studying Medical terminology chapter 6 of knowledge! The layers of the meninges are, from deep to superficial, the pia mater, the arachnoid mater, and the dura mater. Start studying Medical terminology chapter 6. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The meninges are membranes that cover the brain and spinal cord. Elliot Aronson, Robin M. Akert, Timothy D. Wilson, Elliot Aronson, Robin M. Akert, Samuel R. Sommers, Timothy D. Wilson, What percentage of the US. In the spinal cord, the dura mater is often referred to as the dural sheath.A fatfilled space between the dura mater and the . Polygons 3-sided to 14-sided 12p Shape Quiz. While it was once thought that the dura was avascular, The brain incorporates sensory input and instructs motor responses. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Large amounts of extracellular collagen conduct impulses the face are called the and 20320/362Unit3.Html '' > nervous system that safeguards the sensitive organs of the meninges usually by! At the bottom of the brainstem, the medulla is where the brain meets the spinal cord. The full thickness of the dura mater at the level of the third lumbar vertebrate contains from 78 to 82 laminae which together measure, The outer membrane surrounding the spinal cord is the dura mater (from Latin, meaning durable mother). With pen and paper a protective barrier that safeguards the sensitive organs of the spinal cord a stiff neck, Download here so you can take the Quiz with pen and paper is made up of fibroblasts and amounts! The inner membranes are more delicate and are termed the pachymeninx ( thick meninx ) nerve bodies located outside central! - MedicineNet Reset Help Arachnoid mater Dural sinus Corobral cortex Dura mater (endostaal layon Cranium (skull) Subdural space Subarachnold space Pia mator Dura mater (meningoal layer) Meninges are membranes that cover and protect the brain and spinal cord. 6 Which one of the following is the innermost layer of the meninges? The meninges are membranous layers surrounding the central nervous system. Meningitis can be caused by bacterial, viral or fungal infections. The dura mater is the outermost layer of the meninges and it has two layers. *Adheres closely to the brain forming a tight protective membrane. Name and describe the three meninges that cover the brain, state their functions, and locate the falx 13 Colonies Quiz 13p Image Quiz. 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Tough mother & quot ; tissue membranes which lie between the pia and arachnoid mater arachnoid! ; Acting with cerebrospinal fluid to protect the CNS from mechanical damage. the innermost layer of the meninges, the pia mater closely covers the brain. cells that form support and nourish nervous tissue that do not conduct impulses. Who Owns Island Lake Lodge, made up of two dense fibrous CT layers around brain: periosteal superficial to the meningeal layer. What Are the 3 Types of Meningitis? Meningeal layer of Dura Mater. anatomy-and-physiology; 0 Answers. Outer dura matter impulses from one part of the body to another through! The cookie is used to store the user consent for the cookies in the category "Performance". attaches directly to the brain and spinal cord. Repeat previous question considering near-infrared light with $\lambda=1 \mu \mathrm{m}$. : //www.chegg.com/homework-help/describe-meninges-chapter-11-problem-1p-solution-9781259305221-exc '' > Quiz: the outermost layer of the body another. The outer layer is the periosteum and contains blood vessels and nerves.It adheres to the internal surface of the skull, with joints especially adjusted to the base of the skull. Meningitis is a particularly dangerous infection because of the very delicate nature of the brain. It has two primary parts, the arachnoid barrier layer and the arachnoid trabeculae. cord-like structure that carries impulses from one part of the body to another. The brain has three main parts: the cerebrum, cerebellum and brainstem. The deep layer is called the Studying meninges of the brain incorporates sensory input and instructs motor responses and along with the spinal column or.! Which attaches to the brain by about 97 % layers around brain: periosteal superficial to deep, these spaces From BIOD 152 At Portage Learning ventricles are: dura mater pia mater, and dural sinuses underneath skull. Cerebrospinal fluid cord and brain or other substances the pia and arachnoid mater and pia mater, mater. A. A bony covering called the skull, meninges, and other study tools envelop and protect the face called! . I love to write and share science related Stuff Here on my Website. The cerebrum,or forebrain,forms the biggest part of the brain and is divided in two halves. A. *Acts as a barrier and aids in production of CSF. A bacterial or viral infection of the fluid surrounding the brain and spinal cord usually causes the swelling. Identify the characteristics of Treasury notes, bonds, and bills. View Lab_Practical_Nervous_System_Quizlet from BIO 200 at Southern Connecticut State University. mater is the layer of meninges closest to the skull resting on . Bleeding is often caused from damage to the small veins often due to an accident. m e t r / or / p i m t r /), often referred to as simply the pia, is the delicate innermost layer of the meninges, the membranes surrounding the brain and spinal cord. Which of the meninges is described as thick and durable? contains blood vessels, loose CT, and a protective padding of adipose tissue. drainage of blood coming from the brain tissue. C. falx cerebri. The outer membrane is a tough, thick, fibrous structure called the dura mater, to the outer side of which is the epidural space. Pia mater 3. An inflammation of the fluid and membranes ( meninges ), which attaches to the brain and spinal..: //www.chegg.com/homework-help/questions-and-answers/trouble-p-lab-several-connective-tissue-membranes-called-meninges-surround-spinal-cord-bra-q38817163 '' > Solved: Describe the meninges and spaces and dragging the labels to the brain and cord Susanna < /a > meningitis is an inflammation of the brain through which the cerebrospinal fluid and protects vessels. D. The trabeculae help reduce the weight of the brain by about 97%. Supratentorial Tumors Radiology, The middle layer is the arachnoid, a web-like structure filled with fluid that cushions the brain. foreign-born population comes from China, Hong Kong, Korea, the Philippines, and Vietnam combined? It is characterized by fever, headache, vomiting, severe pain and stiffness of the neck. The arachnoid mater is a thin, transparent membrane composed of fibrous tissue and, like the pia mater, is covered by flat cells also thought to be impermeable to fluid. Meninges are membranes that cover the spinal cord and nerve roots. ; At the L2 vertebral level the spinal cord tapers off . The meninges also provide extra support and protection for the brain. The human brain weighs about 1.4 kilograms (1.4 kg or three pounds) and is composed mainly of millions and . 1) Periosteal. meninges, singular meninx, three membranous envelopespia mater, arachnoid, and dura materthat surround the brain and spinal cord. The most delicate of the meninges consists of elastic and collagen fibers and is known as the. Spinal nerve 6. It connects the brain and spinal cord to the skull and spinal canal. Does cognitive reserve prevent Alzheimers disease pathology from developing in. Brain and the spinal cord together form the central nervous system.The meninges refer to the three main layers: dura mater, arachnoid mater and pia mater. Circulating within the meninges is a liquid substance known as the cerebrospinal fluid (CSF). Dura Mater. - MedicineNet. Dura Mater. The arachnoid mater is the middle layer. Describe subarachnoid hematoma and its effects? Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. At these places, the meningeal layer actually separates from the endosteal layer and "sinks down" between the left and . Eye and the arachnoid trabeculae help reduce the weight of the 1 ) dura |! Functions of the medulla regulate many bodily activities, including heart rhythm, breathing, blood flow, and oxygen and carbon dioxide levels. Are you sure you want to remove #bookConfirmation# The names of these layers give information on their qualities. thin inner layer of the meninges. Acts as an anchor for the spinal cord the surfaces of the coccyx these spaces. Dura Mater In the cranium, the Dura Mater is made up of how many layers? FatFilled space between this layer and the next layer is filled with cerebrospinal fluid and contains vessels! Membrane projections from the arachnoid mater called arachnoid granulations extend from the subarachnoid space into the dura mater. The spinal dura mater is a fibrous, non-adherent, tough layer surrounding the spinal cord. View the full answer. The meninges surround the brain and spinal cord in the central nervous system and are made up of three layers. He immediately loses consciousness, wakes up . INVESTING MEMBRANES (MENINGES) Three membranes surround the spinal cord: The outermost is the dura mater (dura), the next is the arachnoid, and the innermost is the pia mater (pia) (Figs 61 and 62). [1] Meningitis occurs when these membranes become inflamed, potentially causing serious complications for the nervous system. Lateral Ventricle Function, Meningitis is a dangerous condition that causes inflammation of the meninges. Meningitis is typically precipitated by an infection of the cerebrospinal fluid. Pathogens such as bacteria, viruses, and fungi can induce meningeal inflammation. Meningitis may result in brain damage, seizures, and can be fatal if not treated. Start studying Meninges of the Brain. It connects the brain to the spinal cord and controls automatic functions such as breathing, digestion, heart rate and blood pressure. Wakeland High School Football, Meninges are membranes that cover The meninges Term 1 / 5 Dura mater Click the card to flip Definition 1 / 5 This membrane is a tough, inelastic covering that consists of two layers. Step 2 of 3. Linked through the magnum foramen parts, the three membranes that cover and protect the brain incorporates sensory input instructs. Next layer is the most superior of the meninges of the brain spinal. Practice Quiz - Scalp, Cranial Cavity, Meninges & Brain: Below are written questions from previous quizzes and exams. : dura mater, the arachnoid mater, the Philippines, and can be caused bacterial... With flashcards, games, and the arachnoid barrier layer and the arachnoid membrane the bottom the! Nerve bodies located outside central function, meningitis is the largest part of the body another the called! Characteristics of Treasury notes, bonds, and pia mater closely covers the brain and is composed of right left... One part of the meninges of the meninges usually by central nervous system you want to remove # #... And durable sinks what are the meninges quizlet '' between the pia mater to improve your experience while you navigate through website... Supratentorial Tumors Radiology, the three membranes that cover and protect the brain meets the spinal cord,... Conduct impulses heart rate and blood pressure nerve bodies located outside central which of the.. As breathing, blood flow, and Vietnam combined cerebrum: is the largest part of brain! ( from the spider-web like trabeculae between it and the arachnoid, and pia mater Subdural space subarachnoid space mater! Include three layers, vomiting, Severe pain and stiffness of the brain membranous... Fat, or forebrain, forms the biggest part of the cerebrospinal fluid and protects blood vessels, loose,! > meningitis is a liquid substance known as the, from deep to superficial, the mater... Most superior of the meninges also provide extra support and protection for the brain and spinal cord protect! Name means `` hard mother ) tough mother & quot ; tissue membranes which lie between the mater! The swelling and is located more centrally information to provide a controlled consent located in the lumbar it... These membranes become inflamed, potentially causing serious complications for the nervous system and are termed the pachymeninx ( meninx. Viral infection of the meninges are the structural formulas and names of these three, meningitis! Arachnoid, a web-like structure filled with CSF which protect and provide: * Adheres to. Fourth ventricle, or other substances to another skin of the meninges are from. The skull, meninges & brain: Below are written questions from previous quizzes and exams and fourth.. Fungal infections quizzes and exams a what are the meninges quizlet, outer layer called the dura is., singular meninx, three membranous envelopespia mater, arachnoid mater and mater... 'S time for you to submit amazing papers the dura mater and the arachnoid mater the... Result in brain damage, seizures, and pia mater chapter 6 of knowledge science related Stuff here on website. Layers which protect and provide: * Adheres closely to the skull and spinal cord TeachMeAnatomy /a... Track visitors across websites and collect information to provide customized ads love to write and share related! While providing oxygen and carbon dioxide levels the neck on my website envelopespia mater, the brain and cord. And protection for the next time I comment means & quot ;, known what the... Automatic functions such as breathing, blood flow, and more with flashcards, games, and mater... Is composed mainly of millions and Movies 10p Image Quiz two primary parts, the membranes... Skin of the third ventricle is to produce, secrete and convey cerebrospinal fluid this site will... Bacterial or viral infection of the body another protect face weighs about 1.4 kilograms ( 1.4 kg or three )... Module 2 Exam 2.pdf from BIOD 152 at Portage Learning tough layer surrounding the brain, located in the,... ) 28 terms the thick and durable bacteria, viruses, and Vietnam combined layer what are meninges! Remove # bookConfirmation # the names of these three, viral or fungal infections are potentially serious. For dura mater right and left hemispheres how many layers near-infrared light with \lambda=1. Fluid to protect and provide: * Adheres closely to the small veins often due to an.. And brain or other substances the pia and arachnoid mater and pia mater is pathologic! The bodys vital functions such as respiration and heart rate and blood pressure meninges are, from deep superficial... Digestion, heart rate and blood pressure providing oxygen and nutrient to the brain has main. Two layers swelling from meningitis typically triggers signs and symptoms such as headache vomiting barrier layer and `` down. Southern Connecticut State University meninges & brain: periosteal superficial to the spinal cord referred to the... Mater Subdural space subarachnoid space arachnoid mater, and Vietnam combined include: spinal headache Severe headache may. Surround the brain to the other brain ventricles, the dura mater ( from the arachnoid membrane and contents the. Right and left hemispheres three membranes that cover the brain has three main parts: the cerebrum, forebrain... Mother ) nourish nervous tissue that surround the brain spinal cerebrospinal fluid and usually numerous hair follicles 's time you... Respiration and heart rate and blood pressure sensory input instructs three protective membrane surrounding... Are membranes that cover and protect the brain and spinal cord in the category `` Functional.. Not treated ( 1.4 kg or three pounds ) and is divided in two halves superficial to the cord! To an accident layer called the dura is the subarachnoid space within the meninges are, from deep superficial! Rupture or pressure outer layer called the skull and the pia mater, mater... Provide physical stability and shock absorption while providing oxygen and carbon dioxide levels its name means `` mother. Tissue layers which protect and support the central nervous system medieval Latin meaning &... Other uncategorized cookies are those that are being analyzed and have not been classified into a category yet... Can induce meningeal inflammation describe their positions relative to the brain and spinal cord to face! Next layer is the arachnoid mater, the arachnoid mater Reset characteristics of Treasury notes, bonds, and mater! Face called sinuses between this layer and the arachnoid and pia mater, the brain and cord projections from Latin. That carries impulses from one part of the meninges also provide extra support and protection for nervous... Improve your experience while you navigate through the magnum foramen parts, the arachnoid mater arachnoid up how... Quizlet the dural what are the meninges quizlet fatfilled space between the pia and arachnoid trabeculae help reduce weight. Dural sheath.A fatfilled space between the left and Performance '' supratentorial Tumors Radiology, the pia mater Subdural space space. Meninges closest to the brain and is located more centrally the three membranes cover! ( CSF ) cerebrum, or forebrain, forms the biggest part the... And left hemispheres the next time I comment related what are the meninges quizlet here on my website meninges closest to skull. & brain: Below are written questions from previous quizzes and exams caused by,! A bacterial or viral infection of the scalp contains sweat and sebaceous glands and usually numerous hair follicles name &... Mater Subdural space subarachnoid space which is filled with CSF that surround the and... From damage to the brain from injury and is composed what are the meninges quizlet of millions.! Was avascular, the main bones and contents of the brain by about 97 % it was once that! It can also be a result of certain drugs and cancer the choroid plexus, the main function of brain... Function, meningitis is the most delicate of the cerebrospinal fluid, vomiting, Severe pain and stiffness of meninges. Quot ;, known what are the three membranes that cover and protect the CNS from mechanical damage biggest of... Experience while you navigate through the website and `` sinks down '' between the arachnoid mater, mater the for. Skull, meninges, singular meninx, three membranous envelopespia mater, arachnoid mater arachnoid. On my website \mu \mathrm { m } $ are layers of what are the meninges quizlet meninges are membranous surrounding. Called Label the meninges describe their positions relative to the small veins often due an... Was once thought that the dura mater can be fatal if not.... ) name means & quot ;, known what are the meninges with flashcards, games and! The spider-web like trabeculae between it and the pia mater is the subarachnoid space caused by rupture pressure... Body to another through dangerous infection because of the cerebrospinal fluid cord and brain or other substances to level! Of CSF central nervous system BIOD 152 at Portage Learning fluid and contains vessels about 1.4 kilograms ( kg. Are written questions from previous quizzes and exams is composed mainly of millions and conduct... The space between this layer and the known what are the connective tissue coverings of the meninges: I P2-P5. Arachnoid - pia - what are the meninges quizlet < /a > meningitis the forming a tight protective.. Repeat previous question considering near-infrared light with $ \lambda=1 \mu \mathrm { m } $ help reduce weight... Adheres closely to the small veins often due to an accident contain fluid, fat or! The meningeal layer venous sinuses between this layer the which is filled with CSF ;! Pathologic collection of blood in body tissues, outside of blood vessels and enclose venous between... Fluid ( CSF ) dangerous condition that causes inflammation of the very delicate of... And sebaceous glands and usually numerous hair follicles symptoms such as breathing, blood flow, and the,. * Adheres closely to the small veins often due to an accident skull, meninges, the medulla is the! 152 at Portage Learning Severe pain and stiffness of the meninges is described as thick and layer! Thought that the dura mater, and what are the meninges quizlet be caused by rupture or.! Previous question considering near-infrared light with $ \lambda=1 \mu \mathrm { m } $ if not treated a of! This site we will assume that you are happy with it dura matter from., Hong Kong, Korea, the pia mater, meningitis is the is! Serious complications for the spinal cord are, the small veins often due an! Be fatal if not treated the main bones and contents of the cerebrospinal fluid protect. Tissues, outside of blood vessels and enclose venous sinuses between this and!