Pathomechanism of iris sphincter tear

2019 ◽  
Vol 122 ◽  
pp. 147-149
Author(s):  
Amar Pujari ◽  
Divya Agarwal ◽  
Aswini Kumar Behera ◽  
Karthika Bhaskaran ◽  
Namrata Sharma
Keyword(s):  
Iris Sphincter

scholarly journals Synergistic Signaling by Light and Acetylcholine in Mouse Iris Sphincter Muscle

2017 ◽  
Vol 27 (12) ◽  
pp. 1791-1800.e5 ◽  
Author(s):  
Qian Wang ◽  
Wendy Wing Sze Yue ◽  
Zheng Jiang ◽  
Tian Xue ◽  
Shin H. Kang ◽  
...  
Keyword(s):  
Sphincter Muscle ◽  
Iris Sphincter

scholarly journals Direct Action of Light in Naturally Pigmented Muscle Fibers

1962 ◽  
Vol 46 (2) ◽  
pp. 333-342 ◽  
Author(s):  
Howard H. Seliger
Keyword(s):  
Visual Pigment ◽  
Absorption Maximum ◽  
Pupil Diameter ◽  
Direct Action ◽  
Pigment Epithelium ◽  
Action Spectrum ◽  
Square Root ◽  
Light Reaction ◽  
First Order ◽  
Iris Sphincter

Contraction due to light in excised eel irises appears to follow a simple first order law. The action spectrum for contraction has a maximum which agrees with the eel rhodopsin absorption maximum. Inasmuch as rhodopsin is the rod pigment-opsin complex and the iris sphincter pupillae evolves from the pigment epithelium of the retina in the region of the iris, the muscle pigment might be the same as the visual pigment. In the human eye the contraction of the iris sphincter is activated only by light incident on the retina and the pupil diameter varies inversely with the square root of the light intensity. The inverse first power relation observed in the present experiments suggests a more primitive origin for the light reaction in eel irises. Relaxation is a much slower process and can be approximated as the sum of two first order processes.

Bimatoprost and prostaglandin F2α selectively stimulate intracellular calcium signaling in different cat iris sphincter cells

2005 ◽  
Vol 80 (1) ◽  
pp. 135-145 ◽  
Author(s):  
Clayton S. Spada ◽  
Achim H.-P. Krauss ◽  
David F. Woodward ◽  
June Chen ◽  
Charles E. Protzman ◽  
...  
Keyword(s):  
Calcium Signaling ◽  
Intracellular Calcium ◽  
Prostaglandin F2α ◽  
Intracellular Calcium Signaling ◽  
Iris Sphincter

Prostaglandins enhance trigeminal substance P-ergic responses in the rabbit iris sphincter muscles

1985 ◽  
Vol 337 (2) ◽  
pp. 347-351 ◽  
Author(s):  
Naoko Ueda ◽  
Ikunobu Muramatsu ◽  
Motohatsu Fujiwara
Keyword(s):  
Substance P ◽  
Rabbit Iris Sphincter ◽  
Rabbit Iris ◽  
Iris Sphincter

scholarly journals Levels of IMeurokinin A, Neurokinin B and Substance P in Rabbit Iris Sphincter Muscle

1986 ◽  
Vol 42 (4) ◽  
pp. 590-593 ◽  
Author(s):  
Takashi TANIGUCHI ◽  
Motohatsu FUJIWARA ◽  
Yoshinori MASUO ◽  
Ichiro KANAZAWA
Keyword(s):  
Substance P ◽  
Sphincter Muscle ◽  
Neurokinin B ◽  
Rabbit Iris Sphincter Muscle ◽  
Rabbit Iris Sphincter ◽  
Rabbit Iris ◽  
Iris Sphincter
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