Anatomy And Physiology Of Brain And Spinal Cord Pdf
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- The Human Brain: Anatomy and Function
- 14.3 The Brain and Spinal Cord
- How the spinal cord works
- Spinal cord
It also integrates sensory impulses and information to form perceptions, thoughts, and memories. The brain gives us self-awareness and the ability to speak and move in the world. Its four major regions make this possible: The cerebrum , with its cerebral cortex, gives us conscious control of our actions.
The Human Brain: Anatomy and Function
The brain is an amazing three-pound organ that controls all functions of the body, interprets information from the outside world, and embodies the essence of the mind and soul. Intelligence, creativity, emotion, and memory are a few of the many things governed by the brain. Protected within the skull, the brain is composed of the cerebrum, cerebellum, and brainstem. The brain receives information through our five senses: sight, smell, touch, taste, and hearing - often many at one time. It assembles the messages in a way that has meaning for us, and can store that information in our memory. The brain controls our thoughts, memory and speech, movement of the arms and legs, and the function of many organs within our body. The central nervous system CNS is composed of the brain and spinal cord.
The central nervous system CNS controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement. Like a central computer, it interprets information from our eyes sight , ears sound , nose smell , tongue taste , and skin touch , as well as from internal organs such as the stomach. The spinal cord is the highway for communication between the body and the brain. When the spinal cord is injured, the exchange of information between the brain and other parts of the body is disrupted. Most systems and organs of the body control just one function, but the central nervous system does many jobs at the same time.
The CNS is crucial to the operation of the body, and any compromise in the brain and spinal cord can lead to severe difficulties. The function of the tissue in the CNS is crucial to the survival of the organism, so the contents of the blood cannot simply pass into the central nervous tissue. To protect the brain and spinal cord from external injuries due to physical trauma and internal damage caused by the toxins and pathogens that may be traveling through the blood stream, there are various protective structures surrounding the brain and spinal cord. The cranial bones and vertebrae are obvious structures that protect the nervous tissue of the brain and spinal cord from external trauma. There are other internal structures, however, that play a large role in protecting and maintaining homeostasis of nervous tissue. In this section, you will learn about the blood supply to the brain, the meninges, and cerebrospinal fluid. The CNS has a privileged blood supply, and there are multiple routes for blood to get into the CNS, with specializations to protect that blood supply.
14.3 The Brain and Spinal Cord
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
This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables. More and more physicians are concerning themselves with medical history, and to an increasing extent specialty boards require that candidates possess some historical knowledge in their specialty. There is a vast array of so-called secondary sources—what has been written about the important historical figures or events. All too neglected have been the primary sources, the writings of the historical figures themselves.
The spinal cord is a long, thin, tubular structure made up of nervous tissue , which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column. It encloses the central canal of the spinal cord, which contains cerebrospinal fluid. The brain and spinal cord together make up the central nervous system CNS. In humans , the spinal cord begins at the occipital bone , passing through the foramen magnum and entering the spinal canal at the beginning of the cervical vertebrae. The spinal cord extends down to between the first and second lumbar vertebrae , where it ends. The enclosing bony vertebral column protects the relatively shorter spinal cord. The spinal cord functions primarily in the transmission of nerve signals from the motor cortex to the body, and from the afferent fibers of the sensory neurons to the sensory cortex.
How the spinal cord works
Spinal Cord Injury Model System. What does the spinal cord do? What is a spinal cord injury?
The brain is a fascinating and complex organ. It is responsible for senses, movement and control, emotions and feelings, language and communication, thinking and memory. Research of the brain and understanding the inner workings of the brain will help us to learn about the mechanisms of certain neurological conditions, including hydrocephalus. Increasing our own knowledge of the brain helps us understand our own bodies better and helps us have informed conversations with our doctors, be it as a patient or a caregiver.
На поиски вируса нужно время, которого нет ни у нее, ни у коммандера. Но, вглядываясь в строки программы и думая, какую ошибку она могла допустить, Сьюзан чувствовала, что тут что-то не .
Он считал себя большим знатоком всего, что способствовало укреплению здоровья, и утверждал, что оливковое масло очищает кишечник. Он вечно навязывал что-то коллегам, например морковный сок, и убеждал их, что нет ничего важнее безукоризненного состояния кишечника. Хейл поставил масло на место и направился к своему компьютеру, располагавшемуся прямо напротив рабочего места Сьюзан. Даже за широким кольцом терминалов она почувствовала резкий запах одеколона и поморщилась.
Он застонал. - Джабба. Скорее вылезай. Он неохотно выполз из-под компьютера. - Побойся Бога, Мидж. Я же сказал тебе… - Но это была не Мидж.
Это наш долг. Нравится нам это или нет, но демократию от анархии отделяет не очень-то прочная дверь, и АНБ ее охраняет. Хейл задумчиво кивнул: - Quis custodiet ipsos custodes. Сьюзан была озадачена. - Это по-латыни, - объяснил Хейл. - Из сатир Ювенала. Это значит - Кто будет охранять охранников?.
1. The Seat of Consciousness: High Intellectual Functions Occur in the Cerebrum
Зюсс. - Он пожал плечами. - Ладно, - нахмурилась Сьюзан. - Попробуем еще… Кухня. - Спальня, - без колебаний отозвался. Сьюзан смутилась.