Journal ArticleDOI
Spinocerebellar projections to the vermis of the posterior lobe and the paramedian lobule in the cat, as studied by retrograde transport of horseradish peroxidase.
Matsuo Matsushita,Michiko Ikeda +1 more
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Spinal neurons projecting to the posterior lobe of the cerebellum were identified with the retrograde horseradish peroxidase technique in the cat and in four cases with the injections it was determined whether in the spinal cord the identified neurons give rise to crossed ascending axons or uncrossed ascending ones.Abstract:
Spinal neurons projecting to the posterior lobe of the cerebellum were identified with the retrograde horseradish peroxidase technique in the cat. In four cases with the injections, which were preceded by hemisections at cervical or thoracic levels, it was determined whether in the spinal cord the identified neurons give rise to crossed ascending axons or uncrossed ascending ones.
The main groups of neurons projecting to sublobule VIIIB were located in the central cervical nucleus (with crossed ascending axons), Clarke's column (with uncrossed ascending axons), and the medial part of lamina VII of L6 to the caudal segments (with crossed ascending axons). Additional labeled neurons were found in the medial part of lamina VI between C2 and T1 and of L5 and L6 (with uncrossed ascending axons), and in the ventral as well as dorsal horns of the sacral-caudal segments (with crossed ascending axons). On the other hand, neurons projecting to sublobule C (the copular part) of the paramedian lobule, which appeared always ipsilaterally to the side of the injections, were located in lamina V of C8 to L4 (with uncrossed ascending axons). Marginal neurons of Clarke's column (with uncrossed ascending axons) and spinal border cells (with crossed ascending axons that recross in the cerebellum) projected specifically to this part. At L1 and L2 or L2 and L3 labeled large and medium-sized neurons were also found within Clarke's column.
The present study suggests that there are segregated projections of spinal neurons to the cortex of the cerebellar posterior lobe.read more
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Proprioception from a spinocerebellar perspective.
TL;DR: This review explores how proprioceptive sensory information is organized at spinal cord levels as it relates to a sense of body position and movement and develops a different framework that may be more in tune with current views of sensorimotor processing in other central nervous system structures.
Journal ArticleDOI
Parasagittal organization of the rat cerebellar cortex: direct comparison of Purkinje cell compartments and the organization of the spinocerebellar projection.
TL;DR: Three‐dimensional reconstructions from alternate frontal sections processed either for the anterograde transport of tracer or for zebrin I immunoreactivity reveal that the limits of the spinocerebellar terminal fields in the granular layer correlate well with the boundaries of some, but not all, ze brin I compartments in the molecular layer above.
Journal ArticleDOI
Topography of Purkinje cell compartments and mossy fiber terminal fields in lobules II and III of the rat cerebellar cortex: spinocerebellar and cuneocerebellar projections.
Z. Ji,Richard Hawkes +1 more
TL;DR: The locations of spino- and cuneocerebellar mossy fiber terminal fields in lobules II and III of the rat cerebellum are compared to the compartmentation of the Purkinje cells as revealed by using zebrin II immunocytochemistry.
Journal ArticleDOI
Development of the spinocerebellar system in the postnatal rat.
TL;DR: The distribution of Spinocerebellar projections from birth to adulthood in rats was analyzed by anterograde and retrograde tracing methods and a correlation between mossy fiber synaptogenesis and the establishment of Spinellar topography was investigated.
Journal ArticleDOI
Fractured cutaneous projections to the granule cell layer of the posterior cerebellar hemisphere of the domestic cat.
TL;DR: The Organization of cutaneous projections to eortibellar hemispheric cortex in cats is reexamined by using micromapping methods.
References
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Journal ArticleDOI
The early stages of absorption of injected horseradish peroxidase in the proximal tubules of mouse kidney: ultrastructural cytochemistry by a new technique.
TL;DR: The early stages of absorption of intravenously injected horseradish peroxidase in proximal tubules of mouse kidney were studied with a new ultrastructural cytochemical technique, which gives sharp localization and is sensitive to protein transport.
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Technical considerations on the use of horseradish peroxidase as a neuronal marker
TL;DR: Techniques are described for increasing the reliability and sensitivity of retrograde labeling of neurons with horseradish peroxidase and the use of diaminobenzidine and its safe disposal are considered.