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Volume 52 (1975 - 197･･･
- Issue 6 Pages 285-
- Issue 5 Pages 233-
- Issue 4 Pages 151-
- Issue 2-3 Pages 59-
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Volume 52, Issue 4
Displaying 1-4 of 4 articles from this issue
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Wei-Bang Kang1975 Volume 52 Issue 4 Pages 151-165
Published: October 20, 1975
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSGross anatomical inspection of the superficial lateral layer of muscles on each side of the neck in 25 bodies of mature Macaca cyclopis (12 males and 13 females) yield the followed results.
The superficial lateral layer of muscles of the neck in Macaca cyclopis is formed by three independent muscles, i. e. the Sternomastoideus, the Cleidomastoideus, and the Cleido-occipitalis.View full abstractDownload PDF (2581K) -
I. Dorsal Column NucleiJohn E. Mateer, Hongchien Ha1975 Volume 52 Issue 4 Pages 167-195
Published: October 20, 1975
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSLesions were placed in the spinal cord and sensory-motor cortex of adult cats in an attempt to produce transneuronal cell degeneration in the dorsal column nuclei. Animals were sacrificed at 30,60 and 90 postoperative days. Serial sections of the cervical cord and medulla were stained with cresyl violet. Other stains utilized were periodic acid Schiff, methyl green pyronin and phosphotungstic acid-hematoxylin.
Mild cellular changes, consisting of hypochromatic staining with cresyl violet, were noted at 30 days. Both mild and severe changes (consisting of alterations in cellular shape, staining and nuclear-nucleolar size) were noted at 60 days. Mainly severe changes were observed at 90 days. Histochemical techniques revealed that severely affected cells had stainable DNA within shrunken nuclei, enlarged nucleoli and a homogeneous proteinaceous deposit within their cytoplasm and pro- cesses.
Ninety day spinal lesions involving dorsal column afferents produced dense transneuronal pathology in the caudal zone of the gracilis. The cell nest zones of the gracilis and cuneatus contained several severely affected cells within individual cell clusters. The rostral zones of both nuclei contained only scattered severely pathological cells. Ninety day unilateral cortical lesions produced dense transneuronal pathology in a limited portion of the caudal gracilis. Rostral zones of both nuclei contained bilaterally symmetrical columns of severely affected cells, located at the junction between gracilis and cuneatus, throughout the length of these zones. Results are discussed in relation to the zonal division of these nuclei and the known organization of each zone.View full abstractDownload PDF (8105K) -
II. Lateral Cervical NucleusJohn E. Mateer, Hongchien Ha1975 Volume 52 Issue 4 Pages 197-213
Published: October 20, 1975
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSLesions in tho cervical spinal cord and in the sensory motor (SM-1) cortex of the cat were found to produce transneuronal cellular pathology in the lateral cervical nucleus (LCN). Animals were sacrificed at 30,60 and 90 postoperative days. Serial sections of the upper cervical cord and lower medulla were stained with cresyl violet. Other stains utilized were periodic acid Schiff, methyl green pyronin and phosphotungstic acid-hematoxylin.
Mild cellular changes, consisting of hypochrOmatic staining with cresyl violet, were noted at 30 days. Both mild and severe changes (consisting of alterations in cellular shape, staining and nuclear-nucleolar size) were noted at 60 days. Mainly severe changes were observed at 90 days. Histochemical techniques revealed that severely affected cells had stainable DNA within shrunken nuclei, enlarged nucleoli and a homogeneous proteinaceous deposit within their cytoplasm and processes.
Both hemisection and selective section of the dorsal spinocerebellar tract at C4-5 produced dense, severe pathology involving most of the cells in the ipsilateral LCN at 90 days. Those cells located in the portion of the nucleus at the rostral Cl level were unaffected. Unilateral SM-1 decortications consistently produced severe transneuronal changes in dorsolateral cell clusters of the contralateral LCN at the rostral C1 level at 90 days. The significance of these results is discussed.View full abstractDownload PDF (4632K) -
An experimental anatomical study in the catDavid S. Liu1975 Volume 52 Issue 4 Pages 215-231
Published: October 20, 1975
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSFor the purpose of analysis of the descending tectofugal pathways in the cat, the Fink-Heimer and Nauta-Gygax techniques have been used to perform this experiment with particular interest in both the tecto-olivary tract and tectospinal tract. By producing the unilateral electrolytical lesions of different sizes and in various sites, exclusively in the superior colliculus, many valuable results were obtained. The most important findings have clearly revealed that the tecto-olivary. tract terminating onto the medial accessory inferior olivary nucleus does not appear when the lesions are restricted to the superior colliculus. In contrast, when the lesion was involved with some surrounding structures i. e. the central gray matter, the reticular formation, or the predorsal bundle severely destroyed, the tectospinal tract gave rise to the tecto-olivary fibers tract sending the preterminal into the inferior olive complex contralateral to the lesion. From the findings it was suggested that this kind of fiber system may be different from other mammals.
On the other hand, the tectospinal tract is commonly known to originate from the prominent fibers of the predorsal bundle located in the cells group of the medial superior colliculus. The predorsal bundle forming the tectospinal tract ran itself caudoventrally, then crossed the dorsal tegmental decussation to predominate in the medial portion of the reticular formation contralaterally and declined caudalward as far as the lower bulb, following which fiber preterminals most apparently ended in the upper cervical cords, and finally the terminations obscurely vanished in the lateral intermediate zone of the seventh cervical cord.
It is hoped that the evidence of this study can explain the fibers system integration impact among the tectum, the inferior olive complex and cerebellum, and that functional relays exist in the brainstem. Such a connective significance is therefore considered an approach to understand the physiological visuomotor relationships, and must be compared in experimental electron microscopic and autoradiographic studies in use nowadays.View full abstractDownload PDF (4362K)
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