File Name: anatomy of brain and spinal cord .zip
The nervous system comprises the central nervous system, consisting of the brain and spinal cord, and the peripheral nervous system, consisting of the cranial, spinal, and peripheral nerves, together with their motor and sensory endings. The central nervous system is composed of millions of nerve and glial cells, together with blood vessels and a little connective tissue.
The spinal cord is a long bundle of nerves and cells that extends from the lower portion of the brain to the lower back. It carries signals between the brain and the rest of the body. This article covers the key anatomy of the spinal cord and its functions. Below is a 3D model of the spinal cord, which is fully interactive. Explore the 3D model using your mouse pad or touchscreen to understand more about the spinal cord. The length of the spinal cord varies from person to person.
The cerebrum, which lies in front or on top of the brainstem, comprises a large portion of the brain. The cerebrum is the newest structure in the phylogenetic sense, with mammals having the largest and most developed among all species. The cerebrum contains the cerebral cortex of the two cerebral hemispheres , as well as several subcortical structures, including the hippocampus, basal ganglia, and olfactory bulb. In larger mammals, the cerebral cortex is folded into many gyri and sulci, which allows it to expand in surface area without taking up much greater volume. With the assistance of the cerebellum, the cerebrum controls all voluntary actions in the body. The cerebral cortex: The cerebral cortex is the outer layer depicted in dark violet.
The central nervous system CNS is the part of the nervous system consisting primarily of the brain and spinal cord. The CNS is so named because the brain integrates the received information and coordinates and influences the activity of all parts of the bodies of bilaterally symmetric animals —i. It consists of a large nerve running from the anterior to the posterior, with the anterior end is enlarged into the brain. Not all animals with a central nervous system have a brain, although the large majority do. The rest of this article exclusively discusses the vertebrate central nervous system, which is radically distinct from all other animals. In vertebrates the brain and spinal cord are both enclosed in the meninges. Within the meninges the brain and spinal cord are bathed in cerebral spinal fluid which replaces the body fluid found outside the cells of all bilateral animals.
The brain and the spinal cord are the central nervous system, and they represent the main organs of the nervous system. The spinal cord is a single structure, whereas the adult brain is described in terms of four major regions: the cerebrum, the diencephalon, the brain stem, and the cerebellum. The regulation of homeostasis is governed by a specialized region in the brain. The coordination of reflexes depends on the integration of sensory and motor pathways in the spinal cord. The iconic gray mantle of the human brain, which appears to make up most of the mass of the brain, is the cerebrum Figure The wrinkled portion is the cerebral cortex , and the rest of the structure is beneath that outer covering.
Spinal Cord Injury Model System. What does the spinal cord do? What is a spinal cord injury? What causes spinal cord injury? What is paralysis? What is paraplegia? What is tetraplegia?
Broadly speaking, the nervous system is organised into two main parts, the central nervous system CNS and the peripheral nervous system PNS. The CNS is the processing centre of the body and consists of the brain and the spinal cord. Both of these are protected by three layers of membranes known as meninges. For further protection, the brain is encased within the hard bones of the skull, while the spinal cord is protected with the bony vertebrae of our backbones.
- Женщина улыбнулась и протянула ему тонкую изящную руку. - Дэвид Беккер. - Он пожал ее руку. - Примите мои поздравления, мистер Беккер. Мне сказали, что вы сегодня отличились. Вы позволите поговорить с вами об. Беккер заколебался.
Для него все шифры выглядят одинаково, независимо от алгоритма, на основе которого созданы. - Не понимаю, - сказала. - Мы же говорим не о реверсии какой-либо сложной функции, а о грубой силе. PGP, Lucifer, DSA - не важно. Алгоритм создает шифр, который кажется абсолютно стойким, а ТРАНСТЕКСТ перебирает все варианты, пока не находит ключ.
Кнопка на полу привела ее в движение, и дверь, издав шипящий звук, отъехала в сторону. Чатрукьян ввалился в комнату.
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The brain and spinal cord form the central nervous system CNS , and they are surrounded and protected by the bones of the skull and the vertebral column back bone.Reply
Figure The central and peripheral nervous systems. Brain stem. Midbrain. Pons. Medulla oblongata. Spinal cord. Cerebellum. Cerebrum.Reply