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What neural injury will the corneal reflex not test for?
The corneal reflex will not test for injuries to the facial nerve (cranial nerve VII) as it primarily assesses the integrity of the trigeminal nerve (cranial nerve V) and the ophthalmic branch of the trigeminal nerve.
What is the difference between a spinal reflex and a cranial reflex?
A cranial reflex is one that is controlled by one of the cranial nerves and tend to take place in the facial or head area. These can include reflexes like the constriction of the pupils in response to light, etc. A spinal reflex, on the other hand, is a reflex that involves only the spinal nerves and is not processed by the brain. An example is the patellar reflex, like when the doctor hits your knee and it reflexively moves. Hope this helps! :)
Light shown into the eye will result in a decrease of the papillary diameter which nerves are involved in this reflex?
The autonomic nervous system is responsible for controlling the pupillary reflex. The parasympathetic nerves, specifically the oculomotor nerve (cranial nerve III), cause constriction of the pupils in response to light.
What two cranial nerves on the stimulated side must be functional for pupillary light reflex to occur?
The two cranial nerves that must be functional for the pupillary light reflex to occur are cranial nerve II (optic nerve) for the afferent pathway (carrying the visual information from the retina to the brain) and cranial nerve III (oculomotor nerve) for the efferent pathway (carrying the motor response to constrict the pupil).
A cranial reflex that is often used to test the sensory function of the trigeminal nerve is the?
corneal reflex. It involves touching the cornea with a wisp of cotton, which should trigger a blinking response mediated by the trigeminal nerve, specifically the ophthalmic branch. This reflex assesses the sensory function of the trigeminal nerve in detecting sensations on the cornea.
What is cranial reflex?
Cranial reflexes are reflex actions that involve sensory input being processed in the brain before initiating a motor response. These reflexes are controlled by cranial nerves, which originate from the brainstem and innervate structures in the head and neck. Examples of cranial reflexes include the pupillary light reflex and the gag reflex.
What is the difference between cerebral reflex and a spinal reflex?
There are two major differences between the dura of the brain and the dura of the cord. The dura of the brain consists of two layers; the periosteal layer is attached directly to the inner surface of the skull and the meningeal layer is deep to the periosteal layer. In places, the two layers are fused together; in other places, dural sinuses lie between the two layers. There is no epidural space associated with the brain
What is eye blinking in response to touch at the medial canthus?
This is the palpebral reflex and tests the function of cranial nerves V and VII. Absence of a palpebral reflex indicates an adequate plane of anesthesia for most surgical procedures.
What is corneal reflex somatic?
The corneal reflex is a protective reflex involving the sensory branch of the trigeminal nerve (V) and the motor branch of the facial nerve (VII). When the cornea is touched, nerve impulses trigger a blinking reflex to protect the eye from potential damage.
The protective aspect of the corneal reflex?
To protect the eye from external damage.
What happens after the spinal cord makes a decision in a reflex?
There are no "decisions" involved in a reflex. Generally the response is to trigger whatever motor nerves move the affected area away from the stimulus.
Is an ankle jerk reflex somatic or autonomic?
Ankle jerk is somatic. It is the reflex action, in which the afferent. connecting and the efferent neurons are involved. Autonomic nerves do not supply the striated muscles.
