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The constriction of pupils in response to bright light is called the pupillary light reflex. If the light is shining directly into one eye, then the pupil in that eye will constrict (a direct response), but so will the pupil in the non-illuminated eye (a consensual response).
This reflex involves two cranial nerves: the optic nerve, which senses the light, and the oculomotor nerve, which constricts both pupils. It is considered involuntary since you don't think about it.
Wiki User
∙ 8y ago
Wiki User
∙ 8y agoThe constriction of pupils in response to bright light is called the pupillary light reflex. If the light is shining directly into one eye, then the pupil in that eye will constrict (a direct response), but so will the pupil in the non-illuminated eye (a consensual response).
This reflex involves two cranial nerves: the optic nerve, which senses the light, and the oculomotor nerve, which constricts both pupils. It is involuntary.
Wiki User
∙ 11y agoits a reflex !
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What is the consensual reflex of the pupil?
the pupil gets smaller because there is an abundance of light present.
What is cranial reflex?
A cranial reflex is a fast, involuntary response to a stimulus. It uses the brain stem as an integrating center (the brain receives sensory information and generates a response). This is contrasted to a spinal reflex, when the response is generated in the spinal cord itself, and the brain only finds out a reflex has occurred after the fact.An example of a cranial reflex would be the tracking movements of your eyes as you are reading this sentence. The dilation and contraction of your pupils in response to different levels of light is another cranial reflex.--------------An example of a spinal reflex would be standing on a pin or touching a hot object.
In the experiment on the photopupillary reflex what happened to the pupil of the nonilluminated eye?
Pupil Dilates
What controls how much light enters the pupil?
The size of pupil is reduced with bright light and vise verse. This is managed by reflex action. Parasympathetic nerve stimulation constricts the pupil. Sympathetic nerve stimulation dilates the pupil.
What is the Response of eye to bright light?
The iris controls the amount of light entering the eyes through pupil. When the surrounding is extremely bright, the iris contracts the size of pupil. This decreases the amount of light entering the eye. This is why when we are suddenly exposed to bright light, the eyes blink and in meanwhile, the iris contracts.
Is the pupil a reflex or voluntary?
Pupils reacts to light, narrowing in bright light and widening in poor light - so is a reflex action.
Are muscles that control your pupil involuntary?
No. They are involuntary and involved in the reflex action in response to light intensity (i.e. high light intensity - pupil constricts, low light intensity - pupil dilates) which is an involuntary response to stimuli (hence why it's considered a reflex action).
What part of in pupil reflex for stimulus?
The stimulus in the pupil reflex would be light
What is the consensual reflex of the pupil?
the pupil gets smaller because there is an abundance of light present.
What part of brain controls pupil dilation?
Edinger-Westphal nucleus of the brainstem controls the pupil reflex. An ER doctor who looks at the response to a pen light is checking on brain stem activity.
Is a pupil autonomic reflex?
yes
What is cranial reflex?
A cranial reflex is a fast, involuntary response to a stimulus. It uses the brain stem as an integrating center (the brain receives sensory information and generates a response). This is contrasted to a spinal reflex, when the response is generated in the spinal cord itself, and the brain only finds out a reflex has occurred after the fact.An example of a cranial reflex would be the tracking movements of your eyes as you are reading this sentence. The dilation and contraction of your pupils in response to different levels of light is another cranial reflex.--------------An example of a spinal reflex would be standing on a pin or touching a hot object.
In the experiment on the photopupillary reflex what happened to the pupil of the nonilluminated eye?
Pupil Dilates
What does the ciliospinal reflex do to the pupil of the eye?
The pupil dilates when stimulated by the pinching on the nape of the neck.
When is a person considered dead?
Someone is considered dead when one cannot breathe without assistance, has no coughing or gagging reflex, has no pupil response to light, has no blinking reflex when the cornea is touched, has no grimace reflex when the head is rotated or ears are flushed with ice water, and has no response to pain.
What cranial nerve controls the response of the illuminated eye?
If the light is shining directly into one eye, then the pupil in that eye will constrict (a direct response), but so will the pupil in the non-illuminated eye (a consensual response). This reflex involves two cranial nerves: the optic nerve, which senses the light, and the oculomotor nerve, which constricts both pupils.
What is an inborn response?
In medicine, when testing the level of consciousness, the response of the pupil to light is a useful test. Another test is to press a finger nail into the 'quick' at the base of the nail. This checks the pain response. Similarly, the tap with a rubber hammer on a tendon will evoke a reflex in the muscle. And this test may show a slight ocillation of the limb - this 'Clonus' is an indicator of the goodness of the reflex.
