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What cranial nerve causes pupil consriction?
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.
What part of the PNS controls the pupillary response?
Pupillary response is controlled by the autonomic nervous system.In bright light or when looking at close objects, the parasympathetic nervous system will cause pupillary constriction by activating the sphincter pupillae muscle(s). The parasympathetic nerves that innervate the sphincter pupillae are the short ciliary nerves, which come from the ciliary ganglion in the orbit. Innervation of the ciliary ganglion is via parasympathetic pre-ganglionic fibers traveling with the occulomoter nerve from the edinger-westfall nucleus in the cranial midbrain.In low light, when looking at distant objects, or when stress levels are high (fight or flight) the sympathetic nervous system will cause pupillary dilation by activating the iris dilator muscle(s). The sympathetic nerves that innervate these muscles come from the superior cervical ganglion.
Does the epilepsy have anything to do with nerve cell?
yes, epilepsy cause by the disruption in the conductance of the impulses by the nerve cells. Imbalance between the inhibition and the excitation of the nerve impulse in the brain cause epilepsy.
Pupillary light reflex somatic or autonomic?
autonomic
Which nerve is used for hearing?
Vestibulocochlear (CN 8). Damage to this nerve can cause tinnitus (deafness).
What cranial nerve causes pupil consriction?
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.
A sudden flash of bright light would cause?
Contraction of the pupillary contrictor muscles.
What is persistent pupillary membrane of the eye?
Persistent pupillary membrane is a condition where parts of a fetal membrane stay attatched to the eye after birth. It can cause cataracts.
Is the optic nerve a sensory or motor nerve?
The optic nerve is a cranial nerve (CN II) that sends special somatic afferent (sensory) fibers to the lateral geniculate of the thalamus. Here, they synapse and continue via optic radiations to the primary visual cortex of the brain. The motor portion of the eye is controlled by cranial nerves as well only they are: Oculomotor (CN III), Trochlear (CN IV), and Abducens (CN VI); there is also some sympathetic innervation (not from cranial nerves) that cause pupillary dialation.
Is the pupillary light reflex autonomic and somatic?
Pupillary light reflex is autonomic.
What part of the PNS controls the pupillary response?
Pupillary response is controlled by the autonomic nervous system.In bright light or when looking at close objects, the parasympathetic nervous system will cause pupillary constriction by activating the sphincter pupillae muscle(s). The parasympathetic nerves that innervate the sphincter pupillae are the short ciliary nerves, which come from the ciliary ganglion in the orbit. Innervation of the ciliary ganglion is via parasympathetic pre-ganglionic fibers traveling with the occulomoter nerve from the edinger-westfall nucleus in the cranial midbrain.In low light, when looking at distant objects, or when stress levels are high (fight or flight) the sympathetic nervous system will cause pupillary dilation by activating the iris dilator muscle(s). The sympathetic nerves that innervate these muscles come from the superior cervical ganglion.
What is the receptor in pupillary reflex and the effector do both change simultaneously in pupillary reflex?
The receptor is the retina of the eye; smooth muscle of the iris is the effector. They both change simultaneously because the pupillary light reflex is contralateral.
Lap Band fill cause Vagus nerve damage?
The vagus nerve is located in the arm of a human. The lap band fill procedure can cause nerve damage to this nerve.
The pupillary light reflex is control by what autonomic nervous system?
pupillary light reflex is controlled by parasympathetic branch of Autonomous nervous system
Does pressure on the root nerve cause pain?
Pressure on the nerve root can definitely cause pain and it may also cause sensory and/or motor deficits.
What cause a nerve impulse move along the nerve fiber?
Electrical diferences.
Does the epilepsy have anything to do with nerve cell?
yes, epilepsy cause by the disruption in the conductance of the impulses by the nerve cells. Imbalance between the inhibition and the excitation of the nerve impulse in the brain cause epilepsy.
