nerves carrying just sensory fibers are referred to as sensory and or what nerves?
No, the glossopharyngeal nerve (CN IX) is not the only cranial nerve that contains sensory fibers. Other cranial nerves, such as the trigeminal nerve (CN V), facial nerve (CN VII), vestibulocochlear nerve (CN VIII), and vagus nerve (CN X), also contain sensory fibers in addition to motor or mixed fibers.
The question is asking what three cranial nerves are purely sensory in their function. Some relevant terms here are olfactory, optic, and auditory or vestibucochlear or acoustic nerves. The only three cranial nerves that are pure sensory in function are cranial nerve #1 : the olfactory nerve (smell), cranial nerve #2 : the optic nerve (sight), and cranial nerve #8 : the auditory/vestibucochlear/acoustic nerve (hearing).
The olfactory nerve (CN I) is the only cranial nerve directly attached to the cerebrum. It carries sensory information for smell from the nasal cavity to the brain.
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.
The right optic tract carries information from the left hand side of both eyes visual field, where-as the right optic nerve carries information solely from the right had eye. After the optic nerves from both eyes perform this partial intersection (in the optic chiasm) they then become known as the optic tract. Hope this helps.
no
No, the glossopharyngeal nerve (CN IX) is not the only cranial nerve that contains sensory fibers. Other cranial nerves, such as the trigeminal nerve (CN V), facial nerve (CN VII), vestibulocochlear nerve (CN VIII), and vagus nerve (CN X), also contain sensory fibers in addition to motor or mixed fibers.
The olfactory nerve, responsible for the sense of smell, is the only cranial nerve that originates directly from the forebrain. It carries sensory information from the nose to the brain for processing.
The question is asking what three cranial nerves are purely sensory in their function. Some relevant terms here are olfactory, optic, and auditory or vestibucochlear or acoustic nerves. The only three cranial nerves that are pure sensory in function are cranial nerve #1 : the olfactory nerve (smell), cranial nerve #2 : the optic nerve (sight), and cranial nerve #8 : the auditory/vestibucochlear/acoustic nerve (hearing).
The cranial nerve that carries only motor information is the hypoglossal nerve, also known as cranial nerve XII. It is responsible for controlling the muscles of the tongue, which are essential for speech and swallowing. Unlike other cranial nerves, the hypoglossal nerve does not carry sensory information.
The olfactory nerve (CN I) is the only cranial nerve directly attached to the cerebrum. It carries sensory information for smell from the nasal cavity to the brain.
No, the ventral ramus contains both motor and sensory fibers. It is a branch of the spinal nerve that provides innervation to various muscles, skin, and structures in the body.
Sensory neurons are the type of nerve cells that carry impulses only towards the body of the cell. They transmit sensory information from receptors in the body to the central nervous system for processing.
I don't know but you are getting on my nerves! Well I do know. The optic nerve is the second cranial nerve and carries information from the eyes into the brain. It does not have any control over the movement of the eyes as this comes from other nerves it only takes special sensory information on the images that the retina is receiving back to the brain to be processed. The optic nerve contains approximately 1.2 million neurons.
The ventral root of the spinal nerve has the efferent fibers and the dorsal root has the afferent. Prior to joining each other in the spine they each consist of only those fibers.
The part of a spinal nerve that contains only sensory neurons is called the ventral root. There's also the axons of motor neurons and axons of sensory neurons.
The only two cranial nerves that are completely sensory are the olfactory nerve (I) for smell and the optic nerve (II) for vision.