The central nervous system (CNS) represents the largest part of the nervous system. Together with the peripheral nervous system, it has a fundamental role in the control of behavior.
Since the strong theoretical influence of cybernetics in the fifties, the CNS is conceived as a system devoted to information processing, where an appropriate motor output is computed as a response to a sensory input. Yet, many threads of research suggest that motor activity exists well before the maturation of the sensory systems and then, that the senses only influence behavior without dictating it. This has brought the conception of the CNS as an autonomous system.
The CNS originates from the neural plate, a specialised region of the ectoderm, the most external of the three embryonic layers. During embryonic development, the neural plate folds and forms the neural tube. The internal cavity of the neural tube will give rise to the ventricular system. The regions of the neural tube will differentiate progressively into transversal systems. First, the whole neural tube will differentiate into its two major subdivisions: spinal cord (caudal) and brain (rostral). Consecutively, the brain will differentiate into brainstem and prosencephalon. Later, the brainstem will subdivide into rhombencephalon and mesencephalon, and the prosencephalon into diencephalon and telencephalon.
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American Brain Tumor Association: Dictionary - Provides definition of related medical terms.
Brainlife.org - Collection of medical literature references about brain tumors including experimental treatments and alternative therapies.
BUPA: Brain Tumours - Fact sheet from this UK entity which addresses causes, symptoms and treatment of brain tumours. Available for download in Adobe Acrobat format.
Meta Description: [ There are two main types of brain tumour - gliomas and meningiomas, they occur most commonly in people of middle age - BUPA health factsheet ]
Center for Gamma Knife Radiosurgery - Provides information about the treatment of brain tumors and other neurological conditions using this technique.
Columbia University: Pilomyxoid Astrocytoma - Resource on this newly discovered type of brain tumor.
eMedicine Health: Brain Cancer - Consumer health resource providing information on causes, symptoms and treatment.
Meta Description: [ Read about brain cancer statistics, treatments, symptoms, causes and risk factors, tumor types, and life expectancy. Not all brain tumors are cancerous, some are benign. ]
Glioma Treatment - Introduction to brain tumor treatments as developed by Dr. Isaac Djerassi and others.
Headstrong - The Brain and Spine Foundation of the UK gives children information about brain tumors including treatment, coping and links.
Hope Through Research: Brain and Spinal Cord Tumors - Summary of informational booklet compiled by the U.S. National Institute of Neurological Disorders and Stroke.
Meta Description: [ Brain and spinal cord tumors information sheet compiled by the National Institute of Neurological Disorders and Stroke (NINDS). ]
James Crofts Hope Foundation - Provides information of interest to families of patients with brain cancer, as well as offering an overview of the activities of this Australian entity.
Meta Description: [ The Foundation is committed to providing assistance for families of patients with brain tumours, and also to the advancement of the treatment and research of these conditions. Our aim is to establish a world-class research facility in Perth, Western Australia. ]
Johns Hopkins University: Radiosurgery for Brain Tumors - Outlines general information with emphasis on a specific treatment technique.
Meta Description: [ The Johns Hopkins Radiosurgery Group includes radiosurgery specialists committed to providing the highest quality radiosurgery treatment for each patient by utilizing the unique expertise, state of the art technologies, and extensive resources available at Johns Hopkins. Find information about br... ]
Links for Brain Tumors - Collection of information in a links format with an emphasis on pediatric conditions.
Meta Description: [ Brain tumor information: links,, Brain tumor information: links. ]
Massachusetts General Hospital: Brain Tumors - This Harvard affiliate provides information about neurosurgeons, referrals, guest book and links.
Meta Description: [ Brain tumor treatments and support ]
Mayo Clinic: Treatment of Astrocytoma - Treatment options for low grade astrocytomas, anaplastic astrocytomas, and glioblastoma multiforme.
Meta Description: [ Astrocytoma diagnosis and treatment options at Mayo Clinic, including information about glioblastoma multiforme ]
National Cancer Institute: Brain Tumors - Offers information on brain tumor, its diagnosis, and treatment. Covers topics on both benign and malignant adult and pediatric brain tumors.
Neoplasms: Karolinska Institutet - List of links relating to neoplasms, with special section on nervous-system neoplasms. From Sweden.
Neuro-Oncology Branch - Describes the workings and activities of this division of the U.S. National Cancer Institute.
Meta Description: [ The Neuro-Ocology Branch is dedicated to the treatment of adults and children with brain tumors. Offering a brain tumor clinic and clinical trials to those patients that qualify. NOB is also dedicated to supporting the training of individuals who plan an academic career in neuro-oncology. Please... ]
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Paediatric Brain Tumours - UK site that presents information on central nervous system malignancies of childhood.
Surviving Brain Tumor - Discusses basic information including tumor types, diagnosis and treatment. Provided by Useful Health Tips of Moreno Valley, California.
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Temodar: Patient Guide - Provides information about this treatment agent.
Meta Description: [ TEMODAR brain tumor treatment for the symptoms of brain tumors ]
University of Chicago: Neuro-Oncology - Information on brain tumors and other related cancers. Contains useful information for patients and professionals.
Meta Description: [ Physicians, medical students, and patients can get information about the diagnosis and treatment of neurological diseases and disorders., Diagnosis and treatment of neurological diseases and disorders. University of Chicago Department of Neurology ]
WHO Classification of Tumors Affecting the Central Nervous System - The World Health Organization classification of tumors affecting the central nervous system.
Live Webcast: Cancer Fighting Technology for Brain Tumors |