The nerves helping us to see is called ______
Answers
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Answer
The nerves helping us to see is called optic cranial nerves.
Explanation
In general, nerves are divided into 2, namely cranial nerves and spinal nerves.
Cranial nerves are nerves that stick out from the brain which consists of 12 pairs of nerves, while the spinal nerves are nerves that stick out from the spinal cord.
Cranial Nerves
The 12 pairs of cranial nerves are as follows :
1. Olfactory cranial nerves
Olfactory cranial nerves are nerves that play a role in smell.
2. Optic cranial nerve
The optic nerve enters the cranial nerves which play a role in sensory.
3. The oculomotor cranial nerves
The oculomotor nerve has two motor functions, namely controlling muscle function and pupil response in the eye.
4. Cranial trochlear nerves
The trochlear nerve controls the superior oblique muscle which is responsible for moving the eyeball down, or when we bulge and come back to normal.
5. Trigeminal cranial nerves
The trigeminal nerve is the largest cranial nerve and holds both motor and sensory functions. The trigeminal nerve itself is further divided into three parts, namely:
- The ophthalmic nerve
The ophthalmic nerve is responsible for sending sensory information from the upper face, such as the forehead, scalp, and eyelids.
- Maxillary nerve
The maxillary nerve plays a role in sending sensory information from the middle of the face such as the cheeks, upper lip and nasal cavity.
- Mandibular nerve
The mandibular nerve functions in terms of sensory as well as motor. This nerve is in charge of sending information from the ear, lower lip, and chin.
6. Abdusen cranial nerve
The abdusen nerve is responsible for regulating movement of a muscle called the lateral rectus muscle. This muscle functions related to eye movements.
7. Facial cranial nerves
Like the trigeminal nerve, the facial nerve also has motor and sensory functions. The facial nerve consists of four branches, each of which has a different function, namely:
- Movement of muscles so that we can bring up facial expressions
- Movements of the lacrimal, submaxillary, and submandibular glands
- Feel the sensation in the outer ear
The ability to taste food
8. Vestibulococlear cranial nerves
The vestibulococlear nerve plays a role in hearing and helps balance humans. This nerve contains two components, namely:
- The vestibular nerves that help the body sense changes in head position due to the force of gravity. Then, the body will use this information to stay in a balanced position.
- The cochlear nerve, which helps humans hear and detect vibrations from sound.
9. The glossopharyngeal cranial nerve
The glossopharyngeal nerve plays a role in motor and sensory functions. Here is the explanation:
- While playing a role in sensory function, these nerves receive information from the throat, tonsils, middle ear and back of the tongue.
- When playing a role in a motor function, this nerve can regulate the movement of the stylopharyngeal muscles, allowing the throat to widen and shorten.
10. The vagus cranial nerve
The vagus nerve has various functions ranging in function, motor, sensory, to parasympathetic.
11. Accessory cranial nerves
The accessory nerve plays a role in supporting the motor or movement of the neck muscles. This muscle controls the muscles in the neck, so that we can move the neck as desired.
12. Hypoglossal cranial nerves
The last cranial nerve is the hypoglossal nerve. These nerves play a role in motor tasks. Because, this nerve regulates the movement of the tongue muscles.
Spinal Nerves
There are 31 pairs of spinal nerves consisting of 8 pairs of cervical nerves (C), 12 pairs of thoracic nerves (T), 5 pairs of lumbar nerves (L), 5 pairs of sacral nerves (S), and 1 pair of coccygeal nerves (Co).
Conclusion
The cranial nerves that function in vision are the optic cranial nerves.
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