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Medical Dictionary Terms Beginning with N
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Nerve, eighth cranial
Nerve, eighth cranial: The eighth cranial nerve is the vestibulocochlear nerve. The vestibulocochlear nerve is responsible for the sense of hearing and it is also pertinent to balance, to the body position sense. Problems with the vestibulocochlear nmore detail info...
Nerve, eleventh cranial
Nerve, eleventh cranial: The eleventh cranial nerve is the accessory nerve. The twelve cranial nerves, the accesssory nerve included, emerge from or enter the skull (the cranium) as opposed to the spinal nerves which emerge from the vertebral column. Themore detail info...
Nerve, facial
Nerve, facial: The facial nerve is the seventh cranial nerve. It is a mixed nerve that has fibers both going out and coming in (both efferent and afferent fibers). It supplies the muscles of facial expression. Paralysis of the facial nerve causes amore detail info...
Nerve, fifth cranial
Nerve, fifth cranial: The fifth cranial nerve is the trigeminal nerve. The trigeminal nerve is quite complex. It functions both as the chief nerve of sensation for the face and the motor nerve controlling the muscles of mastication (chewing). Problemsmore detail info...
Nerve, first cranial
Nerve, first cranial: The first cranial nerve is the olfactory nerve, the nerve that carries impulses for the sense of smell from the nose to the brain. The cranial nerves emerge from or enter the skull (the cranium), as opposed to the spinal nerves whicmore detail info...
Nerve, fourth cranial
Nerve, fourth cranial: The fourth cranial nerve is the trochlear nerve. It is the nerve supply to the superior oblique muscle of the eye, one of the muscles that move the eye. Paralysis of the trochlear nerve results in rotation of the eyeball upward andmore detail info...
Nerve, glossopharyngeal
Nerve, glossopharyngeal: The glossopharyngeal nerve is the ninth cranial nerve. The 12 cranial nerves, the glossopharyngeal nerve included, emerge from or enter the skull (the cranium), as opposed to the spinal nerves which emerge from the vertebral columore detail info...
Nerve, hypoglossal
Nerve, hypoglossal: The hypoglossal nerve is the twelfth cranial nerve. The twelve cranial nerves, the hypoglossal nerve included, emerge from or enter the skull (the cranium), as opposed to the spinal nerves which emerge from the vertebral column. Themore detail info...
Nerve, ninth cranial
Nerve, ninth cranial: The ninth cranial nerve is the glossopharyngeal nerve. All 12 cranial nerves, the glossopharyngeal nerve included, emerge from or enter the skull (the cranium), as opposed to the spinal nerves which emerge from the vertebral column.more detail info...
Nerve, oculomotor
Nerve, oculomotor: The oculomotor nerve is responsible for the nerve supply to muscles about the eye: the upper eyelid muscle, the extraocular muscle which moves the eye inward, and the pupillary muscle which constricts the pupil. Paralysis of the oculommore detail info...
Nerve, olfactory
Nerve, olfactory: The nerve that carries impulses for the sense of smell from the nose to the brain. The olfactory nerve is the second cranial nerve. The cranial nerves emerge from or enter the skull (the cranium), as opposed to the spinal nerves which emore detail info...
Nerve, optic
Nerve, optic: The nerve that connects the eye to the brain. The optic nerve carries the impulses formed by the retina. The retina is the nerve layer that lines the back of the eye that senses light and creates impulses. These impulses are dispatchemore detail info...
Nerve, recurrent laryngeal
Nerve, recurrent laryngeal: One of the best known branches of the vagus nerve (a long and important nerve that originates in the brainstem and runs down to the colon). After the recurrent laryngeal nerve leaves the vagus nerve, it goes down into the chesmore detail info...
Nerve, seventh cranial
Nerve, seventh cranial: The seventh cranial nerve is the facial nerve, a mixed nerve that has fibers both going out and coming in (both efferent and afferent fibers). It supplies the muscles of facial expression. Paralysis of the facial nerve causes a chmore detail info...
Nerve, sixth cranial
Nerve, sixth cranial: The sixth cranial nerve is the abducent nerve, a small motor nerve that has one task: to supply a muscle called the lateral rectus muscle that moves the eye outward. Paralysis of the abducent nerve causes inward turning of the eyemore detail info...
Nerve, tenth cranial
Nerve, tenth cranial: The tenth cranial nerve, and one of the most important, is the vagus nerve. All twelve of the cranial nerves, the vagus nerve included, emerge from or enter the skull (the cranium), as opposed to the spinal nerves which emerge frommore detail info...
Nerve, trigeminal
Nerve, trigeminal: This nerve functions both as the chief nerve of sensation for the face and as the motor nerve controlling the muscles of mastication (chewing). Problems with the sensory part of the trigeminal nerve result in pain or loss of sensationmore detail info...
Nerve, trochlear
Nerve, trochlear: The trochlear nerve controls the superior oblique muscle of the eye, one of the extraocular muscles, the muscles that move the eye. Paralysis of the trochlear nerve results in rotation of the eyeball upward and outward (and, therefore, dmore detail info...
Nerve, twelfth cranial
Nerve, twelfth cranial: The twelfth cranial nerve is the hypoglossal nerve. The twelve cranial nerves, the hypoglossal nerve included, emerge from or enter the skull (the cranium), as opposed to the spinal nerves which emerge from the vertebral column.more detail info...
Nerve, vagus
Nerve, vagus: A remarkable nerve that relates to the function of numerous structures in the body. The vagus nerve supplies nerve fibers to the pharynx (throat), larynx (voice box), trachea (windpipe), lungs, heart, esophagus and most of the intestinal tmore detail info...