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Hace 2 días · A nervous system emerges from the assemblage of neurons that are connected to each other in neural circuits, and networks. The vertebrate nervous system can be split into two parts: the central nervous system (defined as the brain and spinal cord), and the peripheral nervous system.
Hace 5 días · nervous system, organized group of cells specialized for the conduction of electrochemical stimuli from sensory receptors through a network to the site at which a response occurs. Follow the electrical and chemical changes undergone to transmit an impulse through the human nervous system.
Hace 3 días · The name multiple sclerosis refers to the scars (sclerae – better known as plaques or lesions) that form in the nervous system. These lesions most commonly affect the white matter in the optic nerve, brain stem, basal ganglia, and spinal cord, or white matter tracts close to the lateral ventricles. [1]
Hace 2 días · By inhibiting the ability for neurons to perform their expected intracellular functions, or pass a signal to a neighboring cell, neurotoxins can induce systemic nervous system arrest as in the case of botulinum toxin, or even nervous tissue death.
Hace 5 días · brain, the mass of nerve tissue in the anterior end of an organism. The brain integrates sensory information and directs motor responses; in higher vertebrates it is also the centre of learning. The human brain weighs approximately 1.4 kg (3 pounds) and is made up of billions of cells called neurons.
Hace 5 días · neurotransmitter, any of a group of chemical agents released by neurons (nerve cells) to stimulate neighbouring neurons or muscle or gland cells, thus allowing impulses to be passed from one cell to the next throughout the nervous system. The following is an overview of neurotransmitter action and types; for more information, see nervous system.
Hace 3 días · Read chapter Appendix C of Clinical Neuroanatomy, 29e online now, exclusively on AccessNeurology. AccessNeurology is a subscription-based resource from McGraw Hill that features trusted medical content from the best minds in medicine.
