What is Motion Sickness and what are its symptoms?

Motion sickness is a movement disorder that occurs when mismatched signals from the inner ear, eyes, and musculoskeletal system are transmitted to the brain. During vehicle travel, symptoms such as dizziness, nausea, vomiting, and sweating are observed. It is more common in children and women.

The mechanism of motion sickness arises from the mismatch between the vestibular system and visual perception. In-vehicle vibrations, acceleration, and changes of direction create a feeling of imbalance in the brain. This can increase the severity of symptoms.

Treatment methods include the use of medication, short travel breaks, getting fresh air, and focusing on a fixed point. In addition, preventive medication can be prescribed by a physician for individuals who are prone to motion sickness.

In the prevention of motion sickness, choosing the right seat, eating light meals, and avoiding distracting activities are important. Regular sleep and stress control are also effective in reducing the severity of symptoms.

What Are the Symptoms of Motion Sickness?

Motion sickness manifests itself through a variety of symptoms. The mismatch between signals coming from the inner ear, eyes, and body causes confusion in the brain. This situation usually occurs during travel and significantly affects the comfort of the individual.

• Initially, people usually feel stomach discomfort. Over time, this may progress to nausea and vomiting.
• Among the physical symptoms are dizziness and cold sweats. These symptoms are particularly apparent in moving environments.
• Increased salivation and a pale skin tone are also commonly reported symptoms.
• Individuals may experience yawning, rapid breathing, and drowsiness.
• Difficulties with spatial orientation and a general feeling of fatigue are also typical signs of motion sickness.
• In severe cases, a person may experience more serious symptoms such as being unable to walk or persistent vomiting. This can lead to dehydration.

These symptoms generally decrease or resolve when the motion stops. However, in some cases, symptoms may continue for hours even after the motion has ended. The severity and combination of symptoms vary depending on the individual’s sensitivity and on the type, frequency, and intensity of the motion encountered.

Why Do Some People Experience Motion Sickness More Than Others?

Motion sickness appears at different levels in different individuals. The main reasons include differences in sensory processing and neurological factors. The sensitivity of individuals’ sensory systems to motion shows a wide variation. People with more sensitive vestibular systems have greater difficulty when faced with conflicting sensory inputs. This sensory mismatch causes confusion in the brain in situations such as the eyes perceiving a stable point while the inner ear senses motion.

• Sensory Conflict Theory: Conflicts between signals from the inner ear, the eyes, and the somatosensory system cause sensory conflict in the brain. This conflict triggers motion sickness in some individuals.
• Individual Variability in Sensory Processing: Differences in sensitivity within the vestibular system determine the severity of motion sickness.
• Neurological Factors: The brain’s ability to integrate sensory information plays a role in the development of motion sickness. Individuals with a lower capacity to manage sensory conflicts may be more affected.

Environmental and situational factors are also important elements that influence motion sickness. For example, the way a vehicle moves and the quality of driving can increase sensory conflict. Passengers experience motion sickness more often than drivers, because drivers can both anticipate the movements of the vehicle and adjust themselves accordingly, and they maintain a constant forward fixation for driving. For these reasons, some people experience more motion sickness than others, and this is directly related to their individual sensory processing capacity.

How Is Motion Sickness Diagnosed?

The diagnosis of motion sickness is made using specific clinical techniques. The patient’s clinical history and the symptoms experienced during motion or in moving environments are carefully evaluated. These symptoms usually include autonomic responses such as nausea, vomiting, and dizziness. The onset, duration, and triggering conditions of the disorder are critically important for accurate diagnosis.

Symptom evaluation determines the distinguishing features of motion sickness. In this process, the severity of symptoms and their relationship with types of motion are examined in detail. The sensory conflict theory plays an important role in diagnosis. According to this theory, the mismatch between the visual and vestibular systems is one of the main causes of motion sickness.

The diagnostic process is carried out according to the following criteria:

• Clinical History: The patient’s motion-induced symptoms and the duration of these symptoms.
• Symptom Evaluation: A detailed analysis of the relationship between symptoms and different types of motion.
• Sensory Conflict Theory: Evaluation of the mismatch between the visual and vestibular systems.
• Exclusion of Other Conditions: Checking for other conditions that may mimic motion sickness.
• Diagnostic Criteria: Specific criteria used to define the disorder.
• Questionnaires and Rating Scales: Tools that measure the severity of motion sickness and its impact on the patient’s quality of life.

These criteria allow motion sickness to be accurately diagnosed and enable appropriate treatment methods to be determined. Each step is applied carefully in order to best understand and manage the patient’s symptoms.

What Are the Treatment Methods for Motion Sickness?

The treatment and rehabilitation of motion sickness are carried out by audiologists. The treatment process is generally tailored to the patient’s specific condition. Audiologists focus on the vestibular system and offer a series of treatment methods aimed at correcting balance problems. The most commonly preferred method is Vestibular Rehabilitation Therapy, which aims to improve the coordination between balance and vision. Treatment includes techniques that particularly strengthen the vestibulo-ocular reflex and reduce symptoms. In recent years, virtual reality–based rehabilitation has provided significant advantages in the treatment of motion sickness.

Vestibular Rehabilitation Therapy (VRT):

• Exercises designed to improve balance and reduce dizziness
• Helping the brain adapt to conflicting signals

Gaze Stabilization Exercises:

• Exercises that involve focusing on a fixed object while moving the head
• Minimizing conflicting signals between the eyes and the inner ear

Habituation/Adaptation Exercises:

• The patient is gradually exposed to motions that trigger motion sickness
• Desensitizing the vestibular system and reducing symptom severity

Patient education and counseling are also of great importance in the treatment process. Audiologists provide patients with the information they need to better manage their condition. This information includes behavior strategies that reduce symptoms and methods that can be applied to minimize the effects of environmental factors. Through these strategies, patients can greatly alleviate the negative effects of motion sickness.

Can Motion Sickness Affect Your Daily Life?

Motion sickness can profoundly affect daily life. The mismatch between the vestibular, visual, and proprioceptive systems leads to a variety of symptoms that reduce an individual’s quality of life.

In particular, its effects on work and social life cannot be ignored. Dizziness and nausea experienced during commuting or at work can result in reduced performance and loss of productivity. In addition, similar symptoms may disturb the individual during social activities, which can lead to social isolation.

• The severity and frequency of symptoms directly affect an individual’s ability to perform daily activities.
• Individuals with chronic motion sickness tend to avoid using certain types of transportation or participating in specific activities.
• Long-term effects can lead to limitations in personal and professional opportunities.

Although treatment options alleviate current symptoms, the constant pressure created by this condition negatively affects the emotional state of the individual. Fatigue and a persistent feeling of discomfort can lead to secondary psychological problems such as depression or anxiety. This can seriously impair quality of life and interfere with all aspects of daily living.

Does Motion Sickness Differ Across Different Modes of Transportation?

Motion sickness presents different effects across various modes of transportation. Motion, environmental conditions, and variability in visual stimuli create distinct differences in each form of travel.

• Cars: Car-related motion sickness may increase due to the limited field of view and the structure of the vehicle. Constant changes in speed and direction create a conflict between the vestibular and visual systems. The fact that passengers cannot clearly see the road ahead further worsens the situation.
• Boats and Ships: Seasickness is typically associated with rough waters and constant rolling. The mismatch between the visual and vestibular systems leads to more severe motion sickness at sea.
• Airplanes: Air sickness usually occurs during turbulence and take-off/landing. The lack of visual cues and the discrepancy between the inner ear’s perception of motion and visual perception can cause nausea.
• Trains: Motion sickness is generally less common on trains because the movement is smoother. However, frequent stops/starts, many turns, and uneven tracks can cause discomfort, especially for passengers sitting facing backwards.
• Virtual Reality (VR): VR can rapidly trigger motion sickness due to the mismatch between visual stimuli that simulate motion and actual physical movement. Visual immersion causes disorientation and rapidly emerging symptoms.

Each mode of transportation affects motion sickness differently due to its own specific movement patterns and passenger experiences. These differences significantly influence the likelihood and severity of motion sickness in individuals.

Frequently Asked Questions

Why is motion sickness more common in some people?

Motion sickness occurs due to a mismatch between the balance system in the inner ear and the perception of motion from the eyes. It is more common in individuals with genetic predisposition, certain ages, and a sensitive nervous system.

Why is motion sickness more pronounced in children?

Children’s balance systems are more sensitive than those of adults. In addition, limited distracting activities during long journeys and difficulties in focusing make symptoms more pronounced in children.

Do complaints of motion sickness increase during pregnancy?

Yes, due to hormonal changes and a tendency to nausea, motion sickness may be more intense during pregnancy. Taking frequent breaks and sitting in an appropriate position during long trips is beneficial.

In which vehicles is motion sickness most common?

Depending on the pattern of movement, sea travel and winding roads trigger motion sickness the most. Complaints are also common during travel in airplanes and buses with closed cabins.

Do eating habits affect motion sickness?

Avoiding fatty and heavy foods before traveling and choosing light, easily digestible meals may reduce symptoms. Excessive consumption of caffeine and alcohol can increase complaints.

Which medications can be used for motion sickness?

Some antihistamines and anti-nausea drugs can be effective in motion sickness. However, the choice of medication should be made by a physician, taking into account age, pregnancy status, and the person’s general health condition.

What natural methods are available for people with motion sickness?

Ginger, mint, and lemon may help alleviate motion sickness symptoms. In addition, getting fresh air during travel and focusing on the horizon provide natural relief.

Do psychological factors play a role in motion sickness?

Yes, anxiety and anticipatory anxiety can increase symptoms. People who have had negative experiences in the past may experience more intense motion sickness during subsequent journeys. Relaxation techniques can be helpful.

What is the best sitting position to prevent motion sickness?

Sitting in the middle or front of the vehicle, facing forward and looking at a stable view is best. Reading a book or looking at a phone creates a mismatch between the eyes and inner ear and can increase complaints.

Is motion sickness a permanent condition?

It is generally not permanent; in most people, complaints decrease with age. However, in some sensitive individuals it can last a lifetime. With regular precautions and proper habits, its impact can be significantly reduced.

Dr. Ody. Emel Uğur

Dr. Audiologist Emel Uğur was born in 1982 in Çanakkale. She specialized in Pediatric Audiology, Otologic Disorders, and Vestibular System Disorders, and served for 15 years at the Istanbul Training and Research Hospital. In 2015, she joined the Acıbadem Healthcare Group. She currently works as an Audiologist at the Acıbadem Altunizade Hospital and also serves as a faculty member and program director in the Acıbadem University Vocational School of Health Services Audiometry Program.