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A dilated pupil is when the black part of the eye becomes big due to reactions to light or medication. A fixed pupil is one where the black part is stuck open big due to pressure inside of the eye.
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∙ 9y ago
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A young woman is brought to the emergency room with extremely dilated pupils Her friends say that she has overdosed on cocaine What cranial nerve is stimulated by this drug?
maybe the oculomotor nerve is affected( whIcH we alreadY kNown thaT tHe fUnctiON of oculomotor nerve is a mOtor to mOve the eyebAll aNd parasyMpathetic nerve fiber tO cOstriCt tHe pupil) and if thIs nerVe was erruPted,the pUpil will be dilaTed or extremeLy dilated
What is the opening that lets light enter the eyes?
The pupil.
What Is the nerve tissue at the back of the eye which receives the image that has been formed by the cornea the pupil and the crystalline lens.?
That would be the retina.
What 4 main parts of the eye?
There are actually seven main parts: The Retina The Cornea The Lens The Pupil The Iris The Optic Nerve The Conjunctiva
What is the black hole in the center of the iris?
The black circle in the middle of the iris in your eye is called a pupil. It dilates to adjust with sunlight.
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 part of your nrvous system controls open and close pupil?
The third cranial nerve.
A young woman is brought to the emergency room with extremely dilated pupils Her friends say that she has overdosed on cocaine What cranial nerve is stimulated by this drug?
maybe the oculomotor nerve is affected( whIcH we alreadY kNown thaT tHe fUnctiON of oculomotor nerve is a mOtor to mOve the eyebAll aNd parasyMpathetic nerve fiber tO cOstriCt tHe pupil) and if thIs nerVe was erruPted,the pUpil will be dilaTed or extremeLy dilated
Is the response of your pupil a reflex or a voluntary action?
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.
What cranial nerve is not in involved in either taste or smell?
Optic Nerve = Vision Oculomotor Nerve = Eye movement; pupil constriction Trochlear Nerve = Eye movement Trigeminal Nerve = Somatosensory information (touch, pain) from the face and head; muscles for chewing. Abducens Nerve = Eye Movement Vestibulocochlear Nerve = Hearing; balance Vagus Nerve = Sensory, motor and autonomic functions of viscera (glands, digestion, heart rate) Spinal Accessory Nerve = Controls muscles used in head movement. Hypoglossal Nerve = Controls muscles of tongue
How is the Nerve impulse responsible for the pupil becoming smaller?
Pupil is a window for the light to enter our eyes. When we are in a dim light a nerve impulse is generated to the brain to enlarge the pupil. Size of pupil is managed by the iris (coloured part of the eye). If excessive light is there, the pupil shrinks to a smaller size so that the eye's not damaged esp. the retina where the image of objects are formed
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 opening that lets light enter the eyes?
The pupil.
What causes difference in the coloration of your eye pupil?
The pupil is allways black. The iris is the colored part.
What causes a pupil to open and shut?
Muscles.
What causes the pupil to shrink?
the light that gets into it
Why is your pupil so sensitive?
Please, note that you can not touch the pupil. It is well inside the eye, after the anterior chamber. What you think pupil is actually 'Cornea'. It is transperant. It is very sensitive as it is has rich supply of sensory nerve fibres.
