Download Citation on ResearchGate | Principios de neurociencia / editado por Eric R. Kandel, James H. Schwartz, Thomas M. Jessell | Traducción de. Get this from a library! Principios de neurociencia. [Eric R Kandel; James H Schwartz; Thomas M Jessell; Agud Aparicio.; Angel Hernando Saudan; et al]. Get this from a library! Principios de neurociencia. [Eric R Kandel; James H Schwartz; Thomas M Jessell;].
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When the brain is abnormally moist, of necessity it moves, and when it moves neither sight nor hearing are still, but we see or hear now one thing and now another, and the tongue speaks in accordance with the things seen and heard on any occasion. Certain diseases, such as amyotrophic lateral sclerosis and poliomyelitis, strike only motor neurons, while others, such as tabes dorsalis, a late stage of syphilis, affect primarily sensory neurons.
But the role of astrocytes is largely a supporting one.
Eric Kandel : definição de Eric Kandel e sinónimos de Eric Kandel (português)
These channels open when the cell is stretched, as we shall learn in Chapters 7 and 9, permitting a rapid princopios of ions into the sensory cell. Broca’s area is activated prinicpios the word is presented orally or visually. Besides, as we shall see, many mental functions are handled by more than one region or neuronal pathway, and princjpios single lesion may not eliminate them all.
SchwartzEric R. It is at these uninsulated spots on the axon that the action potential becomes regenerated. We shall learn more about the mechanisms underlying the resting potential and action potential in Chapters 6,7,8,9.
Through a variety of experimental methods, such images of the brain can be made while subjects are engaged in specific tasks, which then can be related to the activities of discrete regions of the brain.
Redes neurais biológicas
Indeed, there is now considerable evidence that an intact right hemisphere may be necessary to an appreciation of subtleties of language, such as irony, metaphor, and wit, as well as the emotional content of speech. Astrocytes, the most numerous of glial cells in the central nervous system, are characterized by their star-like shape and the broad end-feet on their processes.
Y This book is the expanded, completel A single oligodendrocyte can wrap its membranous erkc around many axons, insulating them with a myelin sheath. William Heinemann and Harvard University Press. Most other reflexes, including most spinal reflexes, use polysynaptic circuits that include one or more sets of interneurons. The branch that innervates the quadriceps makes contact with stretchsensitive ptincipios called muscle spindles and is excited when the muscle is neeurociencia.
For example, an active neuron may have excitatory connections withboth a target cell and an inhibitory interneuron that has its own feedbackconnection with the active neuron.
Microsc Res Tech They soon realized that although these serial models solved many problems rather well, including the challenge of playing chess, they performed poorly with other computations that the brain does almost instantaneously, such as recognizing faces or comprehending speech.
Principios de neurociencia – Google Books
Parallel processing also occurs in a single pathway when different neurons in the erkc perform similar computations simultaneously. Perception, movement, language, thought, and memory are all made possible by the serial and parallel interlinking of several brain regions, each with specific functions. Each of these components is mediated by a single group or several distinct groups of neurons. Using PET, they determined how individual words are coded in the brain of normal subjects when the words are read on a screen or heard through earphones.
For example, the brain stores separately information about animate and inanimate objects. Monatsber Preuss Akad Wiss Berlin, pp. This signal produces sric action potential in the muscle, causing con-traction of the muscle fiber. Penfield W, Roberts L. They arise from macrophages outside the nervous system and are physiologically and embryologically unrelated to the other cell types of the nervous system.
The writing is clear. Not all neurons share all these features; for example, local interneurons often lack a conductile component. They tend to have rather long processes, some of which terminate in end-feet. Action potentials are all-or-none. SchwartzThoma s M. Adapted from Geschwind Darleane Hoffman e Harold S.
They imagined each region of the cerebral cortex as an independent mental organ dedicated to a complete and distinct mental function much as the pancreas and the liver are independent digestive organs. Jesse l lEric R. These interictal phenomena are interesting because they represent a true psychiatric syndrome. Later in this chapter we shall describe the physiological basis of this principle.