Preferred Name |
sphincter pupillae |
|
Synonyms |
|
|
ID |
http://purl.obolibrary.org/obo/UBERON_0001607 |
|
depicted_by |
http://upload.wikimedia.org/wikipedia/commons/2/2f/Gray878.png |
|
develops_from | ||
has muscle antagonist | ||
has muscle insertion | ||
has muscle origin | ||
label |
sphincter pupillae |
|
part_of | ||
prefixIRI |
UBERON:0001607 |
|
prefLabel |
sphincter pupillae |
|
treeView | ||
UBPROP_0000008 |
WP says: It is found in vertebrates and some cephalopods; this class refers to the vertebrate structure In humans, it functions to constrict the pupil in bright light or during accommodation. Its dimensions are about 0.75 mm wide by 0.15 mm thick. It is controlled by parasympathetic fibers that originate from the Edinger-Westphal nucleus, travel along the oculomotor nerve (CN III), synapse in the ciliary ganglion, and then enter the eye via the short ciliary nerves. Initially, all the myocytes are of the smooth muscle type, but much later in life, so that ultimately most cells are of the striated muscle type. [WP,unvetted] |
|
UBPROP_0000009 |
constricts iris |
|
subClassOf |
http://purl.obolibrary.org/obo/UBERON_0004234 http://purl.obolibrary.org/obo/UBERON_0007521 |