By W. D. Willis
The objective of this monograph is to supply an outline of present considered spinal twine mechanisms for sensory processing. we are hoping that the ebook might be precious either to easy neuroscientists and to clinicians. So me old elements of the matter and some definitions are handled within the first bankruptcy. the second one bankruptcy studies the organiza tion of the peripheral worried approach from the viewpoint of sensory receptors and first afferent axons. The 3rd bankruptcy is worried with what's identified concerning the constitution of the dorsal horn, whereas the fourth bankruptcy considers the task of dorsal horn interneurons. The medical, behavioral, and neurophysiological proof for what elements of the twine white topic comprise specific sensory pathways is mentioned in bankruptcy five, and information about some of the pathways within the dorsal columns, the dorsolateral fasciculus, and the ventral quadrant shape the . subject material of Chapters 6 via eight. the ultimate bankruptcy is an try and summarize what's almost immediately recognized concerning the receptors and the spinal twine pathways accountable for the sensations of touch-pressure, flutter-vibration, soreness, temperature, place feel and visceral sensa tion and approximately descending keep watch over systems.
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Additional info for Sensory Mechanisms of the Spinal Cord
Dorsal root ganglion cells are useful for neurochemical and neuropharmacological studies of synaptic transmitters and presynaptic receptors. 51 3 Structure of the Dorsal Horn This chapter will take as its primary mission the description of the structure of the dorsal horn, in particular laminae l- VI of Rexed (Fig. 1). The format will be to describe each of the laminae in turn, with interludes for issues that are not strictly related to the structure of a particular lamina. This format can be justified because almost all recent studies on the anatomy and physiology of the dorsal horn have used the laminae as landmarks, and it will be one of the purposes of this chapter to show to what extent the laminae are meaningful, not just in terms of being landmarks, but in terms of the fundamental organization of the spinal cord.
13). The ending is responsive both to the rate of stretch of the spindIe (dynamic response) and to the new length (static response). , 1968). The secondary endings are supplied by afferent fibers of intermediate size, the group 11 fibers. Secondary endings show little dynamic responsiveness; instead, they have just a static response, which signals spindIe length. , 1966). Golgi tendon organs are located in the dense connective tissue of muscle tendons and aponeuroses. Their afferents are large myelinated fibers classified as group Ib.
Secondary endings show little dynamic responsiveness; instead, they have just a static response, which signals spindIe length. , 1966). Golgi tendon organs are located in the dense connective tissue of muscle tendons and aponeuroses. Their afferents are large myelinated fibers classified as group Ib. They respond at a high threshold to muscle stretch (Fig. 13B), but at a low threshold to the contraction of motor units ending on the tendon slip containing the receptor (Fig. 13D) (Houk and Henneman, 1967).
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