HISTOCHEMICAL, IMMUNOHISTOCHEMICAL, AND ULTRASTRUCTURAL OBSERVATIONS ON THE IRIS MUSCLES OF GALLUS-GALLUS
被引:13
|
作者:
SCAPOLO, PA
论文数: 0引用数: 0
h-index: 0
机构:UNIV BOLOGNA, INST VET ANAT, I-40126 BOLOGNA, ITALY
SCAPOLO, PA
PEIRONE, SM
论文数: 0引用数: 0
h-index: 0
机构:UNIV BOLOGNA, INST VET ANAT, I-40126 BOLOGNA, ITALY
PEIRONE, SM
FILOGAMO, G
论文数: 0引用数: 0
h-index: 0
机构:UNIV BOLOGNA, INST VET ANAT, I-40126 BOLOGNA, ITALY
FILOGAMO, G
VEGGETTI, A
论文数: 0引用数: 0
h-index: 0
机构:UNIV BOLOGNA, INST VET ANAT, I-40126 BOLOGNA, ITALY
VEGGETTI, A
机构:
[1] UNIV BOLOGNA, INST VET ANAT, I-40126 BOLOGNA, ITALY
[2] UNIV TURIN, INST VET ANAT, I-10126 TURIN, ITALY
[3] UNIV TURIN, INST HUMAN ANAT, I-10126 TURIN, ITALY
来源:
ANATOMICAL RECORD
|
1988年
/
221卷
/
03期
关键词:
D O I:
10.1002/ar.1092210303
中图分类号:
R602 [外科病理学、解剖学];
R32 [人体形态学];
学科分类号:
100101 ;
摘要:
The distribution and typology of fibers in the two muscular systems (sphincter and dilator) of the iris in Gallus gallus were determined histochemically, immunohistochemically, and ultrastructurally. The sphincter muscle in proximity to the ciliary margin was composed predominantly of slow fibers. In the intermediate tract, a large group of fast oxidative fibers were evident and the pupillary margin was exclusively composed of slow fibers. The fast fibers had histochemical and immunohistochemical patterns similar to the .alpha. fibers in the skeletal control muscle (biventer cervicis). In contrast, the slow fibers were composed of at least three slow types, which were comparable to the isoforms of the different myosins in .beta.1 and .beta.2 skeletal fibers. In the dilator muscle, the oblique system was uniquely composed of fast oxidative fibers. The radial system was predominantly composed of slow fibers with isoforms of myosins different from the slow fibers of the sphincter and control muscles. Ultrastructural features (width of Z bands, extension of the sarcoplasmic reticulum and SR-T tubule junctions, and number of mitochondria) confirm the histochemical and immunohistochemical assessements of fiber types, even if some peculiar aspects in several fibers were observed. Smooth muscle cells separated from striated fibers were evident at the pupillary margin. The hypothesis of a mesenchymal origin for all irideal striated muscles is discussed.