| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1986: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1985: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1984: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Research Abstract |
The projection areas of the spinocerebellar tracts were studied using the anterograde transport of wheat germ agglutinin-horseradish peroxidase in the cat.
1. The central cervical nucleus projects to lobules I-IX, the paramedian and simple lobules, and crus I and II. The projection areas are located between zones A1 of both sides, between zones A1 and A2, and in zone A2 to the medial part of zone B.
2. The cervical enlargement projects to sublobules Ib to VIc, VIIb and lobule VIII. The projection areas are located in the medial part of the vermis (zone A1), in zones A1 and A2, and in zones A2-B. These areas extend longitudinally in the apical two-thirds of the apicobasal extent of the lobules.
3. The thoracic cord projects to all lobules of the anterior lobe, lobules VI and VIII, sublobule VIIb, the paramedian lobule, the simple lobule, medial parts of the dorsal paraflocculus, crus I and crus II. The projection areas in the anterior lobe and lobule VI are composed of two distinct longitudinal areas in the medial region and seven ill-defined areas in the basal part of the intermediate-lateral regions of the sublobules. These two medial areas extend from the basal to middle parts in zones A1 and in zone A2 to the medial part of zone B.
4. Spinal border cells project to four areas in sublobules IIb to Va. They are located in the apical part of the lobules from the lateral part of the vermis (zone B) to the intermediatelateral part (zones C1-D).
5. The sacral-caudal cord projects to apical parts of sublobule IIa to lobule III. The projection areas extend from zones B to C3.
The present study shows that the spinocerebellar tracts project to specific areas in the cerebellar cortex according to their cells of origin.
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