Many readers are interested in the right subject: how many cranial nerves are there? Our makers are pleased that we have already studied current research on this fascinating subject. We will provide a wide range of answers based on the latest medical reports, advanced research papers, and sample survey information. Keep repeating to find out more.
Nerves that form specifically from the brain are called nerves. cranial nerves On the other hand, they are called peripheral nerves from the spinal cord. nerves . These nerves Some people have extensions of the body, although they go from the brain through holes in the skull designed into all sorts of heads and necks.
The cranial nerves They all have names, but they are still popular in the correct Roman figure, which named the space of origin from the top of the brain. This. nerves has all sorts of sensory, motor, and other functions related to your well and fidelity.
How many cranial nerves are there?
To answer the question, it is good to start with knowledge of the three groups of nerves They are based on the brain.
There are 12 cranial nerves They are subdivided nerves The engine, for special emotions nerves the muscles of the head, and the nerves through the innervation of structures derived from the arcus brucialis. The knee joint is a primitive structure in formation that leads to more special organs and structures.
- The nerves Editing your special emotions is considered the sense of smell ( cranial nerve I), the ocular ( cranial nerve ii) and vestibulocochlear. nerve ( cranial nerve VIII).
- Cranial nerves It is the eye movements that provide innervation to the muscles in your head ( cranial nerve iii), Trochlear ( cranial nerve IV), abducens ( cranial nerve vi) and hypothyroidism ( cranial nerve XII) nerves .
- The nerves The structures coming from its medial proxial arch are considered truncal ( cranial nerve V), facial ( cranial nerve vii), gloss ( cranial nerve IX), vagus ( cranial nerve (x) and Spinal Dealers ( cranial nerve XI) nerves .
12 Cranial nerve function
So, the question is, “How much cranial nerves are there ? ” we provide a list and description of the functions of 12 cranial nerves :
1. odor nerve (i).
This sensory nerve Enables us to have a sense of smell. He ensures that the cells of the odor epithelium receive information that is transported to the brain odor. This is important because This is because when chemicals from the environment, including food, reach the sensory cells of the nose, impulses are sent to the brain to help distinguish between good and bad odors. Damage to this nerve can lead to numbness and osteopathy.
2. optic nerve (II)
This sensory nerve It transforms information from the environment into a visual image for the brain. Ganglion cells in the inner lining of the eye, called the retina, receive the occupied image and send it to the brain via the viewpoint. nerve Ventilation trauma to the retina or optic nerve system nerve Can lead to blindness or myopia.
3. 3. golas nerve (III).
This is a motor nerve This controls the movement of the eye. Eyelids. nerve To lift the eyelids, turn the eyeballs fully and narrow the opening of the eye (pupil) when exposed to light. along with Trochlear and Abducens. the eye (pupil) is then closed and the eyelid is lifted. the eye (pupil) is then closed and the eyelid is lifted. the eyelid is lifted. nerves , this nerve It deactivates the external muscles of the eye, keeping the pupil size under control and protecting it from the unwanted effects of very large light. Damage to the eyeball nerve May result in abnormal eye movements (strabismus) or lack of pupillary reflexes.
4. trochlear nerve (IV).
This is again the engine. nerve He keeps the eye muscles under control and ensures that you can turn your eyes. It is minimal. cranial nerve He then feeds the dorsal slant eye muscles. Malfunction of this nerve can still lead to strabismus.
5. trigeminal nerve (V).
This is the largest cranial nerve And this provides numerous sensory and motor functions. It is subdivided into three branches called ocular branches. nerve , maxillary nerve and mandibular nerve . The trigeminal nerve The innervation of the structures from the arch of the eye.
- The ophthalmic nerve Or V1 performs sensory functions and is further subdivided into branches of the lacrimal, anterior, nasoglossal, and inferior cerebral branches. This nerves places sensory fibers in the nasal ocular orbit and tear channel.
- The maxillary nerve Or V2 is still sensory nerve infravitalis, Zygomaticus, and those who extend further into the pterygoid nerves . These nerves sensation in the dental portion and taste supply.
- The mandibular nerve Or V3 includes mixed sensory and motor functions. This nerve provides muscles on the tongue that help to chew and generate appetite. It also contains branches of salivary glands that release saliva, which can wet the eater and aid digestion.
6. induction n nerve (VI).
This motor nerve Delivers other muscles to the eyelid, allowing it to change from side to side (outward). If it is damaged he loses his own function and can cause internal deviation from the eye.
7. facial nerve (vii)
This is a motor nerve This is responsible for all the different types of facial expressions. He still has some sensory functions such as feeling your face and tongue.
The facial nerve It comes from the arch of the child. In addition to the face and tongue, he still sends part of the external auditory canal, salivary glands, lacrimal (tear) glands, nasal cavity, and palate.
Depending on the size and point of facial injury nerve Can you feel facial paralysis, loss of eye contact, drooling?
8. vestibular nerve (VIII).
This is a motor nerve This emphasizes your sense of hearing and balance; the two components consist of the vestibular and artificial nerves nerves . The vestibular nerve helps maintain your sense of balance while Cochlea nerve This allows you to hear sound. Injuries to the Balance Organ nerve Causes dizziness and loss of balance, while injury to the snail house nerve Can lead to hearing loss.
9. glossopharyngeal nerve (IX)
This sensory nerve Transports information from the larynx (pharynx) and parts of the palate and tongue. He still has motor functions that help to guess the salivary glands and swallow food.
Grosopharynx. nerve Is derived from the third branchial arch. It has many branches, including the pharynx, tongue, and tympanum nerve branches. Problems related to it nerve include choking and swallowing problems (dysphagia).
10. vagus nerve (x)
This is the longest nerve and is a mixed type of nerve This is because it wears both sensory and motor functions. He feeds the throat, the gullet, the gastrointestinal tract, the windpipe, the bronchi, and part of the heart.
The vagus nerve It is derived from the four branches. In addition to sensory and motor functions, the vagus nerve nerve parasympathetic function acting on the breast and abdominal organs. This affects the beating of the heart, the isolated functions of the glands, and almost all other Problems that go astray nerve Can cause abnormal heartbeat, blackouts, and quiet configurations in blood pressure, voice, and breathing.
11. spinal accessory nerves (XI)
Like the footprint of its name, this motor group nerve branches into the spinal cord and affects the function of the shoulder and neck muscles. It is still derived from the fourth branch. Its cranial The root contributes to the tenth (Vagus) nerve It nourishes the muscles of the larynx, taste and digestive tract. It still contains the spinal root and branches out into dorsal and ventral branches that feed the back and frontal muscles of the neck. Problems with this nerve Can lead to problems placing neck rotation in the frontal plane.
12. neural obliquity (XII).
This is a motor nerve This feeds the muscles of the tongue. With others. nerves Feeding the tongue helps the hypoglossal nerve nerve help move this strong muscle while eating, speaking, and swallowing. Problems with this nerve can lead to an inability to move the tongue to one side.
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