Neuromuscular adaptations to cross-reinnervation in 12- and 29-mo-old Fischer 344 rats.
Neuromuscular adaptations to cross-reinnervation in 12- and 29-mo-old Fischer 344 rats.
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12 个月和 29 个月大的 Fischer 344 大鼠的神经肌肉对交叉神经支配的适应。
DOI:
10.1152/ajpcell.1991.260.1.c96
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发表时间:
1991
期刊:
影响因子:
--
通讯作者:
White,TP
中科院分区:
文献类型:
--
作者:
Clark,KI;White,TP
The aim was to test hypotheses regarding the adaptive response of the extensor digitorum longus (EDL) muscle of 12- and 29-mo rats following denervation and cross-reinnervation by the soleus nerve. The mass of cross-reinnervated EDL muscle was 87 and 86% of self-reinnervated control values in 12-mo (99 +/- 3 mg) and 29-mo (74 +/- 3 mg) rats, respectively. Cross-reinnervated EDL fiber area was 56 and 67% of self-reinnervated values in 12-mo (1,733 +/- 253 microns 2) and 29-mo (1,264 +/- 71 microns 2) rats, respectively. Cross-reinnervation increased the density of neural contact 26% in 12-mo rats and decreased density by 50% in 29-mo animals. In 12-mo rats 17% of motor end plates (MEP) were void of terminal nerves following cross-reinnervation compared with 48% in 29-mo rats. In cross-reinnervated muscles, slow myosin heavy chain (MHC) was 65 +/- 9 and 25 +/- 3% of total MHC in 12- and 29-mo rats, respectively. The percentage of type I fibers derived histochemically was 65 +/- 8% in 12-mo rats and 18 +/- 1% in 29-mo rats. In conclusion, there is an age-associated decrease in the ability of neurons to reinnervate the MEP area after nerve section. The conversion of fiber type in innervated fibers in response to cross-reinnervation may not differ due to age.
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影响因子:
5.5
作者:
BARANY, M;CLOSE, RI
通讯作者:
CLOSE, RI
影响因子:
2.5
作者:
KANDA, K;HASHIZUME, K
通讯作者:
HASHIZUME, K
DOI:
10.1098/rspb.1966.0008
发表时间:
1966-01-01
期刊:
PROCEEDINGS OF THE ROYAL SOCIETY SERIES B-BIOLOGICAL SCIENCES
影响因子:
--
作者:
BARKER, D;IP, MC
通讯作者:
IP, MC
DOI:
10.1093/geronj/37.2.130
发表时间:
1982-01-01
期刊:
JOURNALS OF GERONTOLOGY
影响因子:
--
作者:
YU, BP;MASORO, EJ;LYND, FT
通讯作者:
LYND, FT
DOI:
10.1159/000211109
发表时间:
1962
期刊:
Gerontologia
影响因子:
--
作者:
Z. Drahota;E. Gutmann
通讯作者:
E. Gutmann