Conversion of rat muscle fiber types

1985 ◽  
Vol 83 (6) ◽  
pp. 555-560 ◽  
Author(s):  
C. R. Oakley ◽  
P. D. Gollnick
Keyword(s):  
Muscle Fiber ◽  
Muscle Fiber Types ◽  
Fiber Types ◽  
Rat Muscle

A new variant of proline-rich membrane anchor (PRiMA) of acetylcholinesterase in chicken: Expression in different muscle fiber types

2009 ◽  
Vol 461 (2) ◽  
pp. 202-206 ◽  
Author(s):  
Mokka K.W. Mok ◽  
Ka W. Leung ◽  
Heidi Q. Xie ◽  
Ava J.Y. Guo ◽  
Vicky P. Chen ◽  
...  
Keyword(s):  
Muscle Fiber ◽  
Muscle Fiber Types ◽  
Fiber Types ◽  
Membrane Anchor ◽  
New Variant

Muscle fiber types composition and type identified endplate morphology of forepaw intrinsic muscles in the rat

2016 ◽  
Vol 37 (3) ◽  
pp. 95-100
Author(s):  
Feng Pan ◽  
Jing-yi Mi ◽  
Yan Zhang ◽  
Xiao-yun Pan ◽  
Yong-jun Rui
Keyword(s):  
Muscle Fiber ◽  
Muscle Fiber Types ◽  
Fiber Types ◽  
Intrinsic Muscles

Blood flow to different skeletal muscle fiber types during contraction

1983 ◽  
Vol 245 (2) ◽  
pp. H265-H275 ◽  
Author(s):  
B. G. Mackie ◽  
R. L. Terjung
Keyword(s):  
Skeletal Muscle ◽  
Blood Flow ◽  
Muscle Fiber ◽  
Fiber Type ◽  
Oxidative Capacity ◽  
Skeletal Muscle Fiber ◽  
Muscle Fiber Types ◽  
Fiber Types ◽  
Blood Flows ◽  
Fast Twitch

Blood flow to fast-twitch red (FTR), fast-twitch white (FTW), and slow-twitch red (STR) muscle fiber sections of the gastrocnemius-plantaris-soleus muscle group was determined using 15 +/- 3-microns microspheres during in situ stimulation in pentobarbital-anesthetized rats. Steady-state blood flows were assessed during the 10th min of contraction using twitch (0.1, 0.5, 1, 3, and 5 Hz) and tetanic (7.5, 15, 30, 60, and 120/min) stimulation conditions. In addition, an earlier blood flow determination was begun at 3 min (twitch series) or at 30 s (tetanic series) of stimulation. Blood flow was highest in the FTR (220-240 ml X min-1 X 100 g-1), intermediate in the STR (140), and lowest in the FTW (70-80) section during tetanic contraction conditions estimated to coincide with the peak aerobic function of each fiber type. These blood flows are fairly proportional to the differences in oxidative capacity among fiber types. Further, their absolute values are similar to those predicted from the relationship between blood flow and oxidative capacity found by others for dog and cat muscles. During low-frequency contraction conditions, initial blood flow to the FTR and STR sections were excessively high and not dependent on contraction frequency. However, blood flows subsequently decreased to values in keeping with the relative energy demands. In contrast, FTW muscle did not exhibit this time-dependent relative hyperemia. Thus, besides the obvious quantitative differences between skeletal muscle fiber types, there are qualitative differences in blood flow response during contractions. Our findings establish that, based on fiber type composition, a heterogeneity in blood flow distribution can occur within a whole muscle during contraction.

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