Smooth muscle fiber types and a novel pattern of thick filaments in the wing of the pteropod mollusc Clione limacina

1989 ◽  
Vol 257 (2) ◽  
pp. 405-414 ◽  
Author(s):  
Zuoshi Huang ◽  
Richard A. Satterlie
Keyword(s):  
Smooth Muscle ◽  
Muscle Fiber ◽  
Muscle Fiber Types ◽  
Fiber Types ◽  
Thick Filaments ◽  
Smooth Muscle Fiber ◽  
Clione Limacina

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.

scholarly journals Histomorphometry of penile smooth muscle fiber in severe erectile dysfunction

2005 ◽  
Vol 123 (4) ◽  
pp. 181-186 ◽  
Author(s):  
Joaquim de Almeida Claro ◽  
José Aboim ◽  
Enrico Andrade ◽  
Gustavo Alarcon ◽  
Valdemar Ortiz ◽  
...  
Keyword(s):  
Smooth Muscle ◽  
Erectile Dysfunction ◽  
Muscle Fiber ◽  
Arterial Flow ◽  
Control Group ◽  
Study Objective ◽  
Severe Erectile Dysfunction ◽  
Smooth Muscle Fiber ◽  
Study Results ◽  
Age Range

CONTEXT AND OBJECTIVE: Smooth muscle fiber has fundamental importance in erection. Alterations in its function or quantity may be associated with erectile dysfunction. The study objective was to assess the proportion of penile smooth muscle fiber in patients with severe erectile dysfunction. DESIGN AND SETTING: Clinical study, in the Sexual Dysfunction Group, Universidade Federal de São Paulo (Unifesp), and in the Anatomy Laboratory, Universidade Estadual do Rio de Janeiro (UERJ). METHODS: Twenty patients with severe erectile dysfunction were selected to form two groups of ten patients: one with normal arterial flow (age range: 44 to 78 years) and the other with altered arterial flow (age range: 38 to 67 years). These groups were compared with a group formed by ten cadavers aged 18 to 25 years that were presumed to have been potent. Quantification of the smooth muscle fibers was done by means of an immunohistochemical study. RESULTS: The proportion of smooth muscle fiber found was 41.15% for the control group. The patients with erectile dysfunction and normal arterial flow presented 27.24% and those with altered arterial flow presented 25.74%; 19 patients presented at least one chronic disease or risk factor for erectile dysfunction, with prominence for diabetes mellitus, systemic arterial hypertension and smoking. CONCLUSION: Among patients with severe erectile dysfunction, the arterial flow on its own does not present interference in the proportion of smooth muscle fiber. The diminution of the proportion of smooth muscle fiber may result from chronic diseases and vascular risk factors.

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