Patient's question:
The baby is three months old. Recently, I've noticed that they like to bite their lips. What factors or causes could this be? How should it be corrected?2. When the baby is in light sleep, they shake every few seconds, several times in a row, but it stops once they fall into a deep sleep. I don't know if this is related to the cerebellum?
3. At the Maternal and Child Health Hospital of Hubei Province, I learned a parent-child game where the baby is placed on a bed sheet, and the adult shakes them from both sides, similar to the left and right movements of a balance bed. At this time, the baby appears tense, with their legs tightly clenched. What could be the cause or reason for this? Is it also related to the cerebellum? Today, a brain CT was just performed, and the doctor said that the baby's white and gray matter were...
Doctor's answer:
The internal structure of the spinal cord is composed of gray matter and white matter. The gray matter is located centrally and appears butterfly-shaped and bilaterally symmetrical when viewed in cross-section. It consists of various types of nerve cells and is divided into the anterior horn, lateral horn, and posterior horn of the spinal cord. The anterior horn contains a large number of motor neurons, the lateral horn contains sympathetic neurons, and the posterior horn contains sensory neurons. The white matter is located around the gray matter and is composed of vertically running conducting nerve fibers. Its main components include the corticospinal tract, which consists of motor nerve fibers transmitted from the brain to the spinal cord, and the spinothalamic tract, which consists of sensory nerve fibers transmitted from the spinal cord to the brain.Clinical Advice: Therefore, spinal cord tumors and other internal spinal cord lesions are distinctly different from lesions such as spinal cord compression caused by external factors, such as cervical spondylosis, in terms of symptoms. When one side of the spinal cord is damaged, it can manifest as motor dysfunction, weakness, and heaviness in the limbs on the same side, while sensory loss or reduction in pain and temperature sensation can occur on the opposite side of the limbs. This is known as the "hemisection syndrome of the spinal cord."
The spinal cord is a part of the central nervous system. It gives rise to many paired nerves (called spinal nerves) on both sides, which distribute throughout the body's skin, muscles, and internal organs. The spinal cord serves as a pathway between the peripheral nervous system and the brain. It is also the site of many simple reflex activities and is a low-level center for reflex actions. Spinal cord injuries often occur in conjunction with spinal trauma. Severe spinal cord injuries can lead to lower limb paralysis and incontinence of urine and feces.