Barr's The Human Nervous System: An Anatomical Viewpoint by John Kiernan MB ChB PhD DSc, Raj Rajakumar

By John Kiernan MB ChB PhD DSc, Raj Rajakumar

This vintage well-illustrated textbook simplifies neuroscience content material to concentration assurance at the necessities and is helping scholars examine vital neuroanatomical proof and definitions. between its many differences are its association by means of area after which pathways into and out of the apprehensive method, which allows scholars an built-in view of the anatomy and body structure; point of therapy suited for more and more shorter neuroanatomy direction hours for scientific and allied future health scholars; and the author's succinct writing style.

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Serotonin (5-hydroxytryptamine) Neuromodulator used by neurons in the midline of the brain stem with long branching axons going to all parts of the CNS. Various actions include involvement in sleep (see Chapter 9), mood (see Chapter 18), and pain (see Chapter 19). CNS, central nervous system; GABA, gamma-aminobutyric acid. This table does not include the many peptides that serve as transmitters and modulators throughout the nervous system. Electrical Synapses Electrical synapses are common in invertebrates and lower vertebrates and have been observed at a few sites in the mammalian nervous system.

The reorganization of connections within the brain is known as plasticity. This may be an extension of a normally present adaptability used in the learning of often-repeated tasks. Structural changes accompany the functional plasticity that occurs after injury to the nervous system. Thus, when a group of neurons is deprived of part of its afferent input, preterminal axons that come from quite different places grow new branches that then form synapses at the sites denervated by the original lesion.

Meissner’s corpuscles are about 80 μm by 30 μm in size and are oriented with their long axes perpendicular to the skin’s surface. , end bulbs of Krause, Golgi-Mazzoni endings, genital corpuscles, and mucocutaneous endings), although all may be variants of the same structure. They are commonly spherical, about 50 μm in length, with each containing a coiled, branching axonal terminal in a thin cellular capsule. Most end bulbs occur in mucous membranes (mouth, conjunctiva, and anal canal) and in the dermis of glabrous skin close to orifices (lips and external genitalia).

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