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Published on: Jul 24, 2023
2 minute read
By: SECONDMEDIC EXPERT

Stomachs Growl, Noses Run, And Yawning Is Contagious: The Science Behind These Peculiar Human Reactions

Have you ever found yourself in an awkward situation when your stomach growls loudly in a quiet room, or your nose starts running uncontrollably on a chilly day? And what about that moment when you see someone else yawn, and suddenly, you find yourself yawning too, even though you're not sleepy? These peculiar human reactions have fascinated scientists and puzzled us for years. In this blog post, we'll explore the fascinating science behind why stomachs growl, noses run, and yawning becomes contagious.

1. Why Do Stomachs Growl?

Stomach growling, also known as "borborygmi," is a common phenomenon that often occurs when we're hungry. But why does our stomach make such a loud noise when it's empty? The answer lies in the process of digestion. When our stomach and small intestines are empty, they contract and move air and fluids, which can produce the rumbling or gurgling sounds we hear.

During digestion, the stomach and intestines break down food and extract nutrients to provide energy for our body. When the stomach is empty, these contractions continue as a way to sweep away any remaining food particles and prepare for the next meal. As a result, we hear those familiar grumbling sounds. It's worth noting that stomach growling can also occur after we've eaten, but it's usually less noticeable due to the presence of food in the digestive tract.

2. The Runny Nose Dilemma

A runny nose can be annoying, especially when you least expect it. But this bodily reaction is actually an important defense mechanism. When we encounter irritants like dust, pollen, or viruses, our body activates its immune response to protect the respiratory system.

The lining of our nasal passages contains specialized cells that produce mucus, acting as a sticky trap for foreign particles. When irritants are detected, the body increases mucus production to catch and remove them from the nasal passages. This excess mucus, along with the fluid from swollen blood vessels, leads to the all-too-familiar runny nose.

While it may be bothersome, a runny nose is a sign that your body is actively defending itself against potential threats and keeping your respiratory system healthy.

3. The Contagious Yawn

Yawning is one of the most contagious and intriguing human behaviors. Just witnessing someone yawn can trigger the same response in others, even if they are not tired. Scientists have found that contagious yawning is linked to social and emotional factors.

Yawning is associated with empathy and social bonding. When we see someone yawn, our brain recognizes the action as a sign of fatigue or drowsiness. In response, our brain releases chemicals like oxytocin, also known as the "love hormone," which enhances our ability to connect with others. This neurological reaction is why we often find ourselves yawning in response to someone else's yawn, as our brains interpret it as a signal to empathize and strengthen social bonds.

Conclusion

Stomach growling, nose running, and yawning becoming contagious are all fascinating physiological phenomena with underlying scientific explanations. Our bodies are intricate and sophisticated, and these reactions serve essential purposes in maintaining our overall health and well-being.

Next time you hear your stomach growl or find yourself yawning in response to someone else, remember that it's all part of the incredible complexity of being human. Embrace these quirks and appreciate the wonders of our bodies and the intricate ways they respond to the world around us.

Read FAQs

A. Stomach growling, also known as borborygmi, is caused by the movement of gas and fluids in your gastrointestinal tract. When your stomach and intestines contract and move food and air, it can create these rumbling noises. This is a normal bodily function and usually occurs when your stomach is empty, signaling that you may be hungry.

A. A runny nose is often a sign of the body's immune response to irritants, viruses, or allergens. When your nasal passages are exposed to these substances, the body releases histamines, which cause the blood vessels in the nose to dilate, leading to increased mucus production. The excess mucus flows out of the nose, causing it to "run."

A. Yawning is considered contagious because of social and psychological factors. When we see someone else yawn, it triggers a phenomenon known as "social yawning." The human brain is wired to imitate the behavior of others, and yawning is no exception. It is believed that contagious yawning may be linked to empathy and social bonding, as it often occurs in response to seeing someone else's fatigue or boredom.

A. While stomach growling can be associated with hunger, it's not always the case. The digestive system continues to contract and move even when you are not hungry, so you might experience stomach growling even after a meal. Other factors, such as consuming certain foods, anxiety, or stress, can also contribute to stomach growling.

A. In many cases, a runny nose is a common symptom of allergies or viral infections like the common cold. However, persistent or chronic runny nose, especially accompanied by other symptoms like facial pain, headaches, or loss of smell, could indicate other health issues such as sinusitis or nasal polyps. If you have concerns about your runny nose, it's best to consult a healthcare professional for a proper diagnosis and treatment.

A. Yawning serves several physiological functions. One of the primary purposes of yawning is to regulate brain temperature and increase oxygen intake. Yawning is believed to cool down the brain, enhancing alertness and mental clarity. Additionally, yawning may help stretch and relax facial muscles, providing a quick moment of relief and relaxation.

A. Contagious yawning is an involuntary response triggered by seeing someone else yawn. While it is difficult to consciously prevent contagious yawning, some studies suggest that focusing on the person's eyes instead of their mouth may reduce the likelihood of "catching" a yawn. However, more research is needed to fully understand the mechanisms behind contagious yawning and how to control it.

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Cochlear Implants Explained: Eligibility, Pre-Surgery Insights, and Risks

Cochlear implants have transformed the lives of many individuals with hearing loss, offering them a chance to perceive sound in a new way. Unlike hearing aids that amplify sound, cochlear implants bypass the damaged parts of the ear and directly stimulate the auditory nerve. This blog will explain cochlear implants in detail, focusing on who is eligible, the steps to take before surgery, and the potential risks involved.

What are Cochlear Implants?

Cochlear implants are small electronic devices designed to help people with severe hearing loss. These implants consist of two main parts: an external processor that sits behind the ear and a surgically implanted component. The device works by converting sound waves into electrical signals that directly stimulate the auditory nerve, allowing the brain to interpret these signals as sound.

Who is Eligible for Cochlear Implants?

Eligibility for cochlear implants depends on various factors, including age, the severity of hearing loss, and the individual's overall health. Here are some key considerations:

1.Children and Adults with Severe Hearing Loss: Cochlear implants are suitable for both children and adults who have severe to profound sensorineural hearing loss in both ears. This type of hearing loss occurs when the inner ear (cochlea) is damaged or when there is a problem with the auditory nerve.

2.Limited Benefit from Hearing Aids: Individuals who receive little or no benefit from traditional hearing aids may be candidates for cochlear implants. Audiologists and ENT specialists often perform hearing tests to determine the extent of hearing loss and assess the effectiveness of hearing aids.

3.Motivated Candidates with Realistic Expectations: Candidates for cochlear implants should have a clear understanding of the potential outcomes. They must be motivated to participate in rehabilitation programs after surgery and have realistic expectations about the improvement in their hearing.

4.Healthy Enough for Surgery: Since cochlear implantation involves surgery, candidates must be in good general health. Conditions such as heart disease or uncontrolled diabetes may affect eligibility.

Pre-Surgery Insights: Preparing for Cochlear Implantation

Before undergoing cochlear implant surgery, several steps are essential to ensure a successful outcome. Here are some important pre-surgery insights:

1.Comprehensive Hearing Evaluation: A thorough hearing evaluation is the first step in determining eligibility for a cochlear implant. This evaluation includes audiological tests, speech recognition tests, and an assessment of hearing aid performance.

2.Medical Assessment: A detailed medical evaluation is necessary to check overall health and determine if any medical conditions might interfere with the surgery. This assessment typically includes a physical examination, imaging tests (like CT or MRI scans), and a review of medical history.

3.Counseling and Education: It is crucial for potential candidates to understand what cochlear implants are, how they work, and what to expect post-surgery. Counseling sessions with audiologists, surgeons, and speech therapists help set realistic expectations and provide valuable insights into the rehabilitation process.

4.Psychosocial Evaluation: Mental and emotional readiness is vital for cochlear implant surgery. A psychosocial evaluation assesses the candidate's emotional well-being, motivation, and support system. This evaluation helps ensure that the candidate is prepared for the adjustments needed after surgery.

5.Pre-Surgical Vaccinations: Some doctors recommend vaccinations to reduce the risk of infections after cochlear implant surgery, especially in children. Vaccinations for meningitis, influenza, and pneumonia are commonly suggested.

Understanding the Risks of Cochlear Implant Surgery

Like any surgical procedure, cochlear implant surgery comes with potential risks and complications. It is crucial for candidates and their families to be aware of these risks before making a decision. Here are some common risks associated with cochlear implants:

1.Surgical Risks: Cochlear implant surgery involves general anesthesia, which carries its own set of risks, such as allergic reactions, breathing problems, or heart complications. The surgery itself may lead to bleeding, infection, or damage to the facial nerve, which can cause temporary or permanent facial weakness.

2.Device Malfunction or Failure: Although rare, the implanted device may malfunction or fail over time, necessitating additional surgeries to repair or replace the device. Regular follow-up appointments with the implant team are essential to monitor device performance.

3.Loss of Residual Hearing: Cochlear implant surgery can result in the loss of any remaining natural hearing in the implanted ear. This risk is particularly significant for individuals who still have some hearing ability before the surgery.

4.Dizziness or Balance Issues: Some individuals may experience dizziness or balance problems after cochlear implant surgery. These symptoms are usually temporary but can sometimes persist, requiring further medical attention.

5.Tinnitus (Ringing in the Ears): Tinnitus, or ringing in the ears, is a potential side effect of cochlear implant surgery. In some cases, the implant may worsen pre-existing tinnitus or cause new onset tinnitus.

6.Electrostatic Discharge (ESD) Risk: Cochlear implants can be sensitive to electrostatic discharge, which can damage the device. Patients are often advised to avoid contact with sources of static electricity, such as certain types of clothing or electronic devices.

Post-Surgery Rehabilitation: The Road to Better Hearing

The journey to improved hearing does not end with cochlear implant surgery. Post-surgery rehabilitation is critical to maximize the benefits of the implant. Here's what to expect:

1.Initial Activation and Tuning: About 2-4 weeks after surgery, the implant is activated, and the external processor is tuned to the individual's specific hearing needs. This process may require multiple visits to the audiologist to fine-tune the settings.

2.Speech and Language Therapy: Speech and language therapy is often necessary, especially for children or individuals who have experienced long-term hearing loss. These therapies help in adapting to the new way of hearing and understanding sounds.

3.Regular Follow-Up Appointments: Ongoing follow-up appointments are crucial to monitor the implant's performance, adjust settings, and address any issues. These appointments help ensure the implant is functioning optimally and provide an opportunity for further counseling and support.

Conclusion: Weighing the Benefits and Risks of Cochlear Implants

Cochlear implants offer a promising solution for individuals with severe hearing loss, providing the potential to perceive sound and improve communication skills. However, it is essential to understand the eligibility criteria, prepare thoroughly before surgery, and be aware of the potential risks involved. For those who are eligible and motivated, cochlear implants can significantly enhance the quality of life by restoring a sense of hearing and connection to the world of sound.

If you or a loved one is considering cochlear implants, consult with a healthcare professional to discuss your specific needs and determine if this transformative technology is right for you.