Sensory Mechanisms of the Spinal Cord by W. D. Willis Jr., R. E. Coggeshall (auth.)

By W. D. Willis Jr., R. E. Coggeshall (auth.)

As acknowledged within the preface to the 1st variation, the target of this monograph is to supply an summary of present considered the spinal twine mechanisms liable for sensory processing. we are hoping that the e-book could be of price to either uncomplicated neuroscientists and clinicians. The association of the monograph has the unique plan in so much respects, even though the emphasis has replaced with appreciate to many subject matters due to fresh advances. specifically, a considerable raise within the variety of investigations of the dorsal root ganglion has led us to dedicate a bankruptcy to this subject. The therapy of chemical neuroanatomy within the dorsal horn, in addition to the appropriate neuropharmacology, has additionally been improved significantly. one other significant emphasis is at the result of experiments making use of microneurography in human matters. We thank Margie Watson and Lyn Schilling for his or her suggestions with the typing and Griselda Gonzales for getting ready the illustrations.

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Key for classification of cutaneous receptors in mammals. , reprinted with permission. ) 25 J tlon tion Intermedlat~ btotween above abov(l two. two, but IS IS more mor@ f - - - - - Yes Intermedlat. ·e to manual Vibration of orthe the hair than rprepton. bidirectionally ~n· ~n­ either G, or G: rPfPptors. sltlve, but m8~ ma~ ~ somewhat som(lwhat lesa leu senSlllve 8@nsltlve to hair movt"menl8 movements back toward. towards the rest posi. IIo relatively rapid movt>ments of smgle guard haln hair! both 8""ay a""ay from and back towards the rest positIOn.

LaMotte and Thalhammer (1982) described a class of high-threshold cold receptors in the skin of monkeys with A8- and C-sized axons. The receptors responded to colder, but innocuous, cold stimuli below the range for maximal responses of low threshold cold receptors. Warm Receptors. The morphology of warm receptors is unknown, but they are presumed to be free endings. Warm receptors are a distinctly separate group from cold receptors. They are active at normal body temperature. Their discharge slows with cooling of the skin, and it accelerates with warming, reaching a maximum at temperatures of about 45°C (Fig.

Mferent nerve terminals contact the Merkel cells. The sense organs take the form of domelike structures (Fig. 3A) in some animals, including cats, rabbits, mice, rats, and guinea pigs. However, demarcation of tactile domes in the skin of primates (including humans) is difficult. Often, a tylotrich hair follicle is associated with a tactile dome (K. R. Smith, 1968). These morphological features give rise to alternative names for this receptor type: Merkel cell ending, tactile dome, touch corpuscle, and Haarscheibe.

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