There are 12 cranial nerves, they are as followed;
(I) Olfactory
(II) Optic
(III) Oculomotor
(IV) Trochlear
(V) Trigeminal
(VI) Abducens
(VII) Facial
(VIII) Vestibulocochlear
(IX) Glossopharyngeal
(X) Vagus
(XI) Accessory
(XII) Hypoglossal
There are 12 cranial nerves. These nerves consist of the optic nerve, the olfactory nerve, the oculomoter nerve, the trochlear nerve, the trigeminal nerve, the abducent nerve, the facial nerve, the vestibulocochlear nerve, the glossopharyngeal nerve, the vagus nerve, the spinal accessory nerve, and the hypoglossal nerve.
Cranial Nerve:
Origin/ Location
Organs
I Olfactory
Telencephalon
smell
II Optic
Diencephalon
vision
III Oculomotor
Midbrain
eyelid and eyeball movement
IV Trochlear
Midbrain
innervates superior oblique
turns eye downward and laterally
V Trigeminal
Pons
chewing
face & mouth touch & pain
VI Abducens
Posterior margin of Pons
turns eye laterally
VII Facial
Pons(cerebellopontine angle) above olive
controls most facial expressions
secretion of tears & saliva
taste
VIII Vestibulocochlear
(auditory)
Lateral to CN VII (cerebellopontine angle)
hearing
equillibrium sensation
IX Glossopharyngeal
Medulla
taste
senses carotid blood pressure
X Vagus
Posterolateral sulcus ofMedulla
senses aortic blood pressure
slows heart rate
stimulates digestive organs
taste
XI Spinal Accessory
Cranial and Spinal Roots
controls trapezius & sternocleidomastoid
controls swallowing movements
XII Hypoglossal
Medulla
controls tongue movements
There are many many millions of nerves, each one is a single cell but these are more correctly termed neurons. It is estimated that there are up to 100 billion neurons in the human brain. It is likely that there are more neurons in the human body than any other cell type. There are also the main named 'nerves'. These are the collections of individual cells that all follow the same anatomic route through the body (within a single connective tissue pipe or sheath); for example the sciatic nerve and the radial nerve. There are three main types of nerves and, according to Wikipedia, 214 named nerves. Allowing for bilateral symmetry one could expect the answer to your question to be 428. However there are many unnamed nerves, such as those that run to small sensors in the skin or the periosteum, and many that are repeated many more times than twice (the intercostal nerve for example). So the answer in fact must be that there are many thousands, but quite possibly millions, of bundles neurons. It is said that there are enough nerves in the human body that if all the other cells were somehow removed the network of fine nerves would be numerous enough to enable you to easily recognize the individual concerned and to recognize every tissue layer in his or her body.
Optic, olfactory, vagus, occulomotor, facial, glossopharyngeal,
there are 12 cranial nerves,olfactory,optic,oculomotor,trochlear,trigeminal,abducent,facial,acostic,glossophyrangeal,vagus,accessory and hypoglosal,how could i remember it?
pns
There are 12 pairs of cranial nerves that are part of the PNS. These nerves are sensory, mixed and mostly motor.
yes! there are 12 pairs of cranial nerves
nerves emerging from brain are called cranial nerves.they are 12 pairs
The total number of our cranial nerves is 12 pairs........... d-_-b
12 pairs
12 pairs like human
Rats have twelve pairs of cranial nerves.
Brainstem (midbrain, pons, and medulla).
Peripheral Nervous System (PNS) original answer by btbchris
There are 12 pairs of cranial nerves. Of those, the ones with the most anterior origin are called olfactory I. Olfactory I nerves are responsible for the sense of smell.
There are 12 pairs of nerves that directly arise from the brain and stem. There are others that arise in pairs from the spinal cord.
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