blink reflex nerve
The nerve reflex process of defecation
The defecation reflex was a reflex action of the internal organs. When the feces fell into the anus, it would stimulate the wall of the anus. Through reflex, it would cause a series of wriggling movements in the descending colon, sigmoid colon, and anus. At the same time, it would relax the internal and external constrictors of the anus canal and contract the abdominal wall muscles, thus expelling the feces.
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2026-07-14 21:58
What kind of nerve reflex is farting?
There were two main aspects of the neural reflex process involved in farting. On the one hand, muscle contraction and pressure changes led to the nervous reflex when gas was discharged. When people laughed, the abdominal muscles contracted and the pressure changed. This change could push the gas in the intestine to the anus and discharge it. During this process, the nervous system regulated the muscle contraction and pressure changes, so that the gas in the intestine was discharged. On the other hand, the nerve reflex mechanism causes the anus to relax. Laughter, as an emotional response, can activate the autonomous nervous system, which may cause the muscles of the anus to relax, making it easier for the gas in the intestines to be discharged, resulting in farting.
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2026-07-01 12:18
Does the nerve center of reflex have a brain?
Yes. The nerve center was distributed in various parts of the central nervous system, including the brain, spinal cord, marrow, pontine, midbrain, upper and lower hypochondrium, cerebrum, and other different nerve tissues. Reflex activity required the participation of the nerve center, so the nerve center of reflex was the brain. For example, the respiratory center existed in many parts of the brain, such as the oblongata, pontine, and even the cerebral cortices.
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2026-07-01 12:33
Why is the nerve center of reflex located in the brain?
Not all reflexes were located in the brain. Simple reflexes such as the knee jerk reflex had a low-level nerve center located in the gray matter of the spinal cord. The nerve center of complex reflexes was mainly located in the brain. The nerve center of conditioned reflexes was mainly located in the cerebral cortices and subcortices because these parts were the high-level nerve centers that participated in complex reflex activities. In the central nervous system, the nerve center was formed by the collection of nerve cells with the same function. Its role was to regulate the corresponding physiological activities of the human body. For some complex physiological functions, such as learning and quenching thirst, it required the high-level centers of the brain (such as the prefrontal lobe and limbic system of the cerebral cortexes) to participate in the transmission of nerve signals, analysis and synthesis, so as to connect the originally unrelated stimulation with a specific response. Therefore, the nerve center of complex reflexes was located in the brain.
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2026-07-04 14:55
Reflex and Pupil Reflex
The adjustment reflex and the pupil's light reflex were two important physiological reflexes.
The reflex of accommodation was a series of changes in the eyes in order to see nearby objects, such as the bulging of the lens, the narrowing of the pupils, and the convergence of the eyes.
The pupil's light reflex was even more interesting. When light shone on one side of the eye, the illuminated pupil would shrink. This was the pupil's light reflex. It could protect the eyes from strong light and regulate the amount of light entering the eyes.
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2026-08-10 22:25
Is the anus reflex a deep reflex?
No, the anus reflex is shallow. It was mainly used for patients suspected to have damage to the spinal tract or cauda equina. It could be examined through specific methods, such as lying flat on the bed, raising the lower limbs straight, and using a cotton swab to cut across the perineal area. Under normal circumstances, the external anus constrictor would contract. It could also be used to prove the existence of innervation of the external anus constrictor structure through light needle or scratch stimulation. The patient could also be placed in the side lying position or the stone cutting position. The doctor would stand on the right side or in front of the patient and gently touch or tap the edge of the anus with a cotton swab. Under normal circumstances, the patient would feel a slight stimulation and have a constrictive reaction of the anus. Reflexes are caused by sacrospinal cord 4 - 5 or anococcygeal nerve damage.
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2026-07-14 02:53
Urination reflex is non-reflex
This statement was wrong. Urination was a complex reflex activity controlled by the central nervous system. The urine reflex was a physiological process that was controlled and participated in by the higher-level nerve center (the cerebral cortexes), but at the same time, it was also controlled and influenced by the lower-level nerve center (the spinal cord urine center). When the amount of urine in the bladder reached a certain level, it would produce a nerve impulse. This impulse would be transmitted to the cerebral hemisphere through the nerves, triggering the urge to urinate and activating the reflex to urinate. This was a complete reflex process.
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2026-07-14 05:51
blink of an eye
"In the blink of an eye" is a Chinese idiom, which means that it is a very short time. This idiom is usually used to describe how time passes quickly, like the blink of an eye. In literary works, this idiom was often used to describe the rapid development of a character's actions or events.
While waiting for the TV series, you can also click on the link below to read the classic original work of " A Record of a Mortal's Journey to Immortality "!
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2024-10-18 04:43
What is vegetative nerve?
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2026-06-22 08:11
What are the nerve reflexes?
The nerve reflexes mainly included unconditioned reflexes and conditioned reflexes.
Unconditioned reflexes were innate reflexes. It was a relatively low-level nerve activity that could be completed by the nerve center below the cerebral cerebral bark (such as the brainstem and spinal cord). For example, the knee jerk reflex, the blink reflex, the hand retracting reflex, and the baby's suckling reflex were all unconditioned reflexes.
The conditioned reflex was an acquired reflex that gradually formed in the process of life. It was based on the unconditioned reflex, and after a certain process, it was completed with the participation of the cerebral hemisphere. It was a high-level neural activity. For example, quenching one's thirst by looking at plums and turning pale at the mention of tigers were all conditioned reflexes.
In addition, from the perspective of the reflex arc, there were different types of reflexes such as shallow reflexes (such as corneal reflex, abdominal reflex, etc.) and deep reflexes (such as biceps reflex, triceps reflex, etc.). The abnormality of these reflexes could help the doctor determine whether there was a disease in the nervous system.
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2026-08-12 08:43
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