Dendrite bundles in Lamina IX of cat spinal cord: A possible source for electrical interaction between motoneurons?

1971 ◽  
Vol 171 (2) ◽  
pp. 313-327 ◽  
Author(s):  
Murray A. Matthews ◽  
William D. Willis ◽  
Vick Williams
Keyword(s):  
Spinal Cord ◽  
Dendrite Bundles

Morphological characteristics of dendrite bundles in the lumbar spinal cord of the rat

1976 ◽  
Vol 110 (2) ◽  
pp. 215-227 ◽  
Author(s):  
William J. Anderson ◽  
Melvin W. Stromberg ◽  
Edward J. Hinsman
Keyword(s):  
Spinal Cord ◽  
Morphological Characteristics ◽  
Lumbar Spinal Cord ◽  
Dendrite Bundles ◽  
Lumbar Spinal

Dendrite bundles in the ventral commissure of cat spinal cord

1973 ◽  
Vol 39 (3) ◽  
pp. 482-488 ◽  
Author(s):  
Madge E. Scheibel ◽  
Arnold B. Scheibel
Keyword(s):  
Spinal Cord ◽  
Dendrite Bundles

scholarly journals Vestibular Deprivation and the Development of Dendrite Bundles in the Rat

2000 ◽  
Vol 7 (3) ◽  
pp. 193-203 ◽  
Author(s):  
Hildegard C. Geisler ◽  
Jos IJkema-Paassen ◽  
Johan Westerga ◽  
Albert Gramsbergen
Keyword(s):  
Spinal Cord ◽  
Cholera Toxin ◽  
Transverse Direction ◽  
Behavioral Analysis ◽  
Back Muscles ◽  
Cholera Toxin Subunit B ◽  
Postural Tasks ◽  
Dendrite Bundles ◽  
Subunit B

Motoneuronal pools of muscles that subserve postural tasks contain dendrite bundles. We investigated in the rat the development of these bundles in the pools of the long back muscles and related this to postural development. Motoneurons and their dendrites were retrogradely labeled by injecting unconjugated cholera toxin subunit B (CTB) into the muscles of 54 normal rats from birth until adulthood and into 18 rats that were vestibularly deprived from the 5th postnatal day (P5). Dendrite bundles coursing in a transverse direction already occurred at P1. From P4, the first longitudinal bundles could be observed, but the major spurt in development occurred between P6 and P9, when conspicuous bundles developed coursing in rostro-caudal and tranverse directions. This is the age when rats become able to stand freely and walk a few steps. Around P20, the dendrite bundles attained their adult characteristics. Vestibular deprivation by plugging both semicircular horizontal canals did not lead to a retarded development of dendrite bundles nor to a changed morphology. This finding is remarkable, as behavioral analysis showed a delay in postural development by about 3 days. We hypothesize that dendrite bundles in the pools of the long back muscles function to synchronize the motoneurons in different spinal cord segments.

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