Rostrocaudal distribution of motoneurones and variation in ventral horn area within a segment of the feline thoracic spinal cord
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Rostrocaudal distribution of motoneurones and variation in ventral horn area within a segment of the feline thoracic spinal cord. / Meehan, Claire Francesca; Ford, Tim W; Road, Jeremy D; Donga, Revers; Saywell, Shane A; Anissimova, Natalia P; Kirkwood, Peter A.
In: Journal of Comparative Neurology, Vol. 472, No. 3, 2004, p. 281-91.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Rostrocaudal distribution of motoneurones and variation in ventral horn area within a segment of the feline thoracic spinal cord
AU - Meehan, Claire Francesca
AU - Ford, Tim W
AU - Road, Jeremy D
AU - Donga, Revers
AU - Saywell, Shane A
AU - Anissimova, Natalia P
AU - Kirkwood, Peter A
N1 - Copyright 2004 Wiley-Liss, Inc.
PY - 2004
Y1 - 2004
N2 - Retrograde transport of horseradish peroxidase, applied to cut peripheral nerves, was used to determine the rostrocaudal distribution of motoneurones supplying different branches of the ventral ramus for a single mid- or caudal thoracic segment in the cat. The motoneurones occupied a length of spinal cord equal to the segmental length but displaced rostrally from the segment as defined by the dorsal roots, with the number of motoneurones per unit length of cord higher in the rostral part of a segment (close to the entry of the most rostral dorsal root) than in the caudal part. The cross-sectional area of the ventral horn showed a rostrocaudal variation that closely paralleled the motoneurone distribution. The ratio between the number of motoneurones per unit length in the caudal and rostral regions of a segment (0.70) was similar to the ratio previously reported for the strength of functional projections of expiratory bulbospinal neurones (0.63). This is consistent with the motoneurones being the main targets of the bulbospinal neurones.
AB - Retrograde transport of horseradish peroxidase, applied to cut peripheral nerves, was used to determine the rostrocaudal distribution of motoneurones supplying different branches of the ventral ramus for a single mid- or caudal thoracic segment in the cat. The motoneurones occupied a length of spinal cord equal to the segmental length but displaced rostrally from the segment as defined by the dorsal roots, with the number of motoneurones per unit length of cord higher in the rostral part of a segment (close to the entry of the most rostral dorsal root) than in the caudal part. The cross-sectional area of the ventral horn showed a rostrocaudal variation that closely paralleled the motoneurone distribution. The ratio between the number of motoneurones per unit length in the caudal and rostral regions of a segment (0.70) was similar to the ratio previously reported for the strength of functional projections of expiratory bulbospinal neurones (0.63). This is consistent with the motoneurones being the main targets of the bulbospinal neurones.
KW - Afferent Pathways
KW - Animals
KW - Anterior Horn Cells
KW - Cats
KW - Female
KW - Histological Techniques
KW - Horseradish Peroxidase
KW - Laminectomy
KW - Male
KW - Motor Neurons
KW - Spinal Cord
KW - Thoracic Nerves
U2 - 10.1002/cne.20096
DO - 10.1002/cne.20096
M3 - Journal article
C2 - 15065124
VL - 472
SP - 281
EP - 291
JO - The Journal of Comparative Neurology
JF - The Journal of Comparative Neurology
SN - 0021-9967
IS - 3
ER -
ID: 40314932