Buch, Englisch, Band 57, 58 Seiten, Format (B × H): 170 mm x 244 mm, Gewicht: 143 g
Buch, Englisch, Band 57, 58 Seiten, Format (B × H): 170 mm x 244 mm, Gewicht: 143 g
Reihe: Advances in Anatomy, Embryology and Cell Biology
ISBN: 978-3-540-09449-4
Verlag: Springer Berlin Heidelberg
It is known that the medial geniculate body (MGB) is the last relay center in the audi tory system. Its projections to the auditory cortex have been studied extensively in the cat using retrograde cell degeneration and the Marchi technique. The auditory cortex has also been defined electrophysiologically and cytoarchitecturally by many authors (Fig. 1). Woolsey and Walzl (1942) first defined the primary (AI) and secondary (All) auditory areas by electrical stimulation of cochlear nerve fibers. Later studies have dem onstrated other cortical areas responsive to auditory stimulation: the posterior ecto sylvian area (Ep), the suprasylvian fringe (SF), the third auditory'area (AlII) in the sec ond somatic sensory area (SII), the insular area (Ins) or the fourth auditory area (AIV), and the temporal area (Temp). Classic anatomic methods, such as the Marchi and retrograde cell degeneration methods, were not suitable for studying the precise organization of the cortical pro jections of MGB, however, the Nauta method has been useful in the study of these pro jections (Wilson and Cragg, 1969; Niimi and Naito, 1972, 1974; Sousa-Pinto, 1973). These studies indicated that parts of MGB send differential projections to individual auditory areas, although considerable overlap of the projections is seen. Furthermore, some authors showed that the pulvinar nuclear group also projects to the auditory cor tex (Graybiel, 1973; Niimi et aI., 1974a; Rosenquist et aI., 1974).
Zielgruppe
Research
Autoren/Hrsg.
Weitere Infos & Material
1 Introduction.- 2 Material and Methods.- 3 Results.- 3.1 Cytoarchitectural Subdivision of MGB.- 3.2 Primary Auditory Area.- 3.3 Secondary Auditory Area.- 3.4 Suprasylvian Fringe.- 3.5 Dorsal Part of the Posterior Ectosylvian Area.- 3.6 Ventral Part of the Posterior Ectosylvian Area.- 3.7 Insulotemporal Area.- 3.8 Second Somatic Sensory Area.- 4 Discussion.- 4.1 Retrograde Axonal Transport of HRP.- 4.2 Primary Auditory Area.- 4.3 Secondary Auditory Area.- 4.4 Suprasylvian Fringe.- 4.5 Dorsal Part of the Posterior Ectosylvian Area.- 4.6 Ventral Part of the Posterior Ectosylvian Area.- 4.7 Insulotemporal Area.- 4.8 Second Somatic Sensory Area.- 5 Summary.- References.
