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The intrinsic muscles of the eye are the dilator (radial), the sphincter pupillae (circular) constrictor muscle and the ciliary muscle. The iris contains the dilator pupillae and the constrictor pupillae with antagonist effects on the diameter of the pupil.
The ciliary muscle is a smooth muscle that, when contracted relaxes the suspensory ligament of the lens. Contraction of this muscle is part of the accommodation reflex and under the control of parasympathetic fibers that travel with cranial nerve 3.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoThe intrinsic eye muscles are the iris sphincter, radial pupil dilators and the ciliary muscles, and are controlled autonomically. These work in response to amount of light, closeness of an object (for focusing), etc.
In asking about 6 eye muscles, I believe you are referring to the extra-occular muscles that are responsible for eye movement. Those are:
1) The superior rectus
2) The inferior rectus
3) The lateral recyus
4) The medial rectus
5) The inferior oblique
6) The superior oblique
Wiki User
∙ 14y agoScphinter pupillae when contracted decreases pupil size. And Dilator pupillae when contracted increases pupil size.
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What kind of Eye muscles are controlled by the autonomic nervous system?
intrinsic eye muscles are controlled by the autonomic nervous system
What are the intrinsic eye muscles controlled by?
The iris and the ciliary muscle
Why is it more of a strain on the intrinsic and extrinsic eye muscle to look at the close objects than at far objects?
extrinsic muscles are strained
Why is the human eye surrounded by six different muscles?
Ocular movements
How do extrinsic eye muscles differ in action from the instrintic eye muscles?
Extrinsic eye muscles move the eyeball in relation to the rest of the body, whereas intrinsic muscles move structures within the eyeball.A: The extrinsic muscles control the movement of the eyes.The extrinsic muscles are controlled by the somatic nervous system(voluntary) The intrinsicmuscles control the lens and pupil. The intrinsiceye muscles, (including the iris sphincter, radial pupilodilator muscles and the ciliarymuscle), are under the control of the autonomic nervous system(involuntary)
What are deep muscles?
The deep muscles of the human body are generally called intrinsic muscles. The muscles that are closer to the skin are called superficial muscles.
What are the six things attached to each eye that control and coordinate the movements of the eye?
You have superior rectus, inferior rectus, medial rectus, lateral rectus, superior oblique and inferior oblique eye ball muscles, which control the movements of eye.
What is intrinsic sphincter deficiency?
the sphincter muscles are unable to keep the bladder closed (intrinsic sphincter deficiency, ISD).
What are deep muscles called?
The deep muscles of the human body are generally called intrinsic muscles. The muscles that are closer to the skin are called superficial muscles.
What is the definition of intrinsic arteries of the eye?
The term intrinsic means essential in nature. They are necessary and needed.
How many extrinsic eye muscles are attached to the exterior surface of each eyeball?
30
Which type of muscle tissue moves the eye?
There are six different muscles that allow the human eye to move. The kind of muscle tissue that moves the eye is known as connective tissue.
