We all know about the big organs in our body. We always talk about things like the heart, lungs, kidneys, and liver. But how much do we know about the tiny, yet very powerful parts inside the brain that control all of this, that control our entire body? Today, we are going to talk about a very important part of the brain that, despite its small name, silently performs many essential functions in our lives. We call this part the pons .
Simply put, what is this Pons?
Imagine your brain as a big city. There must be roads and bridges to carry information to and from each part of this city. Similarly, the pons is a major bridge that transfers information between the upper part of your brain and the spinal cord below it. In fact, the Latin word 'pons' means 'bridge'.
It is located in the second-to-lower part of our brainstem. To be precise, just above the medulla oblongata. This small part acts as a major center that helps carry signals from the upper part of our brain to the lower parts of our body, and signals from the body to the brain.
Also, there is a special network of nerves that are directly connected to our brain. We call these 'Cranial Nerves' . The pons also acts as a major junction and stop for several of these nerves. Therefore, it has a connection to many things such as our facial expressions, eye movements, hearing, and balance.
What are the main functions of the pons?
This little bridge does a lot of work. Like a major interchange on a highway, it is essential for the transmission of signals in our nervous system. The pons also contains a number of special chemicals, called neurotransmitters , that help with this signal transmission. These are especially important for regulating our sleep.
The table below shows the main functions of the pons.
| Main function | A simple explanation |
|---|---|
| Sleep and wake control | This helps control our sleep cycle. The pons determines how alert our body should be when we wake up in the morning. It is also involved in the REM sleep phase, where we dream. |
| Pain signal management | The pons controls the path of pain signals from anywhere in our body below the neck to the brain, and regulates those signals. This means it also affects the intensity of the pain we feel. |
| Working in collaboration with other parts of the brain | The pons doesn't work alone. It works closely with the cerebellum, which controls our body's balance and movement. It also works in collaboration with other parts of the brainstem, which control our involuntary breathing. |
Relationship with the cranial nerves directly connected to the brain
There are 12 pairs of major nerves that connect directly to our brain and control the activities of the face, head, and neck. These are what we call the Cranial Nerves. The main roots (nuclei) of 4 of these 12 are located within the pons. This means that the pons is like a head office for these 4 nerves.
| Name of Nerve | The main function of it |
|---|---|
| Trigeminal nerve (Trigeminal nerve - V) | This nerve sends messages to your brain about touch, pain, and temperature on your face. It also controls the muscles that work when we chew food. |
| Abducens nerve (Abducens nerve - VI) | This nerve controls the muscles that help us turn our eyes from side to side (outward). If it is damaged, we can experience double vision (diplopia) . |
| Facial nerve (Facial nerve - VII) | This nerve controls all facial expressions, whether we laugh, cry, or are surprised. Not only that, it also helps the front of our tongue taste. |
| Vestibulocochlear nerve (Vestibulocochlear nerve - VIII) | It has two parts. The vestibular part controls our body's balance . The cochlear part gives us the ability to hear sounds . |
Location, appearance, and size of the pons
Location: This is located at the base of our skull, as one of the lowest parts of the brain.
Appearance: It looks like the stem at the top of a cabbage flower. It is a light beige-white color.
Size: This is not as big as you might think.
- Height: About 1 inch (27 millimeters).
- Width: About 1.5 inches (38 millimeters).
- Depth: About 1 inch (25 millimeters).
What is the pons made of?
Like the rest of our brain, the pons is made up mainly of nerve cell types. These can be divided into two main types.
1. Neurons
These are the main functional cells of our nervous system. These cells send and receive electrical and chemical signals. There are several main parts of a neuron:
- Cell body: This is the main part of the cell.
- Axon: A long, arm-like part that extends from the cell body. It is used to carry signals to other cells.
- Dendrites: Small, branching structures that extend out like the branches of a tree. These structures receive signals from other neurons.
- Myelin: A protective fatty sheath around the axon. This helps signals travel faster.
2. Glial cells
These are like a team of support workers that help neurons. Although they don't send signals, these cells help keep neurons healthy, protect them, nourish them, and protect them from infection. In fact, there are about ten times more glial cells than neurons in our nervous system.
What are the common medical conditions that can affect the pons?
Like any disease that affects the brain, the pons can be affected by various diseases because it is located in a very sensitive and important location.
- Stroke: Damage caused by a blockage or rupture of a blood vessel that supplies blood to the pons.
- Brain tumors: Tumors, whether cancerous or noncancerous, can occur in or around the pons.
- Traumatic brain injuries: Head injuries from accidents can also damage the pons.
- Multiple sclerosis: A disease of the immune system that damages the myelin covering the nerves.
- Central pontine myelinolysis: A serious condition caused by damage to the myelin sheath in the pons due to rapid correction of sodium levels in the body.
- Locked-in syndrome: A very sad condition caused by severe damage to the pons. In this condition, the patient is conscious but unable to move any part of the body except for the eyes.
- Infections: Infections such as bacteria and viruses can also affect the pons by spreading to the brain.
The most important thing is to see a qualified doctor as soon as possible if you suspect a condition like this, because time is of the essence in brain-related matters.
Symptoms that may occur when there is a problem with the pons
Symptoms can vary depending on which part of the pons is damaged, because as we discussed earlier, it performs different functions.
| Symptom | Simple meaning |
|---|---|
| Ataxia | Uncontrollable shaking of the body while walking and moving. |
| Diplopia | Seeing two and two. |
| Vertigo | Severe dizziness, feeling as if you or the environment around you is spinning. |
| Nystagmus | Rapid, uncontrolled movement of the eyes from side to side or up and down. |
| Paralysis of the face or body | Numbness or tingling in part of the face or one side of the body. |
| Tinnitus | Hearing a continuous sound like a 'ringing' inside the ears. |
| Hearing loss (Deafness) | Sudden or gradual decrease or loss of hearing. |
Tests that check the health of the pons
If you have symptoms like these, your doctor may examine you and refer you for various tests to find the cause of the illness.
- Physical examination of the nervous system: The doctor will check things like your balance, eye movement, and facial muscle function.
- MRI scan: This is the best way to get very clear images of the brain and pons.
- CT scan: This can also take pictures of the brain, especially in emergency situations.
- Blood tests: These help detect infections, immune system problems, or toxins in the body.
- EEG test: A test that measures the electrical activity of the brain.
- Genetic testing: This test can be performed if there is a suspicion that some rare diseases are hereditary.
How are problems in the pons treated?
There is no single specific treatment for this. Treatment depends entirely on the cause of the disease.
- In cases of paralysis, treatment is given to dissolve or remove the blood clot.
- If it is a brain tumor, surgery, radiotherapy, or chemotherapy may be required, depending on the type.
- If there is an infection, antibiotics or other medications will be given to treat it.
- In a condition like multiple sclerosis, you may have to take medication to control the disease for the rest of your life.
- In some incurable conditions, treatments such as physiotherapy are provided to control symptoms and maintain the patient's quality of life.
What can we do to protect the health of the pons?
We can't prevent some diseases that affect the pons, such as genetic diseases. However, there are many things we can do to reduce our risk.
- Eat a balanced diet: A diet rich in vitamins and nutrients is very important for the health of your nervous system.
- Maintain a healthy weight and exercise: These things can help control diseases that increase the risk of stroke, such as high blood pressure, diabetes, and cholesterol.
- Wear safety equipment: When riding bicycles, motorbikes, or engaging in hazardous work, be sure to wear a protective headgear such as a helmet. A head injury can be life-threatening.
- Manage your chronic diseases properly: If you have diseases like high blood pressure and diabetes, follow your doctor's instructions and take the prescribed medications . If these are not controlled, brain damage can be serious.
Ultimately, the pons is a small, yet powerful, and essential part of our body. Even though we may not be aware of it, this little bridge is working silently with every breath we take, every second we sleep, and every moment we maintain our body's balance. Therefore, taking care of our overall brain health is a great way to protect this small part.
Take-Home Message
- The pons is a small part of our brainstem that controls very important things like breathing, sleep, balance, and facial movements.
- Damage to this can cause serious symptoms such as facial numbness, double vision, difficulty walking, and dizziness.
- If you or someone you know suddenly develops symptoms like these, go to a hospital's Emergency Department (ETU) immediately, as it could be a sign of a stroke.
- A balanced diet, regular exercise, protection from head injuries, and proper management of chronic diseases (high blood pressure, diabetes) can protect the health of the entire brain, including the pons.
💬 අදහස් (0)
තවමත් කිසිදු අදහසක් පළ කර නොමැත. ඔබේ අදහස පළමු වරට මෙහි එක් කරන්න.
ඔබේ අදහස එක් කරන්න