Theories on the Causes of Idiopathic Head Tremors
Idiopathic head tremors in dogs, including Dobermans, are a perplexing condition with no definitive cause. However, several theories have been proposed by (holistic) veterinarians and researchers to explain their occurrence. Understanding these theories can help pet owners gain a better perspective on potential triggers and management strategies should they not be satisfied with conventional veterinary medicine’s idea that idiopathic head tremors do neither warrant concern nor treatment. While traditional wisdom seems to favor two theories, integrative and holistic views take the dog’s system as a whole into account to explain where the tremors may originate from, as each bodily system does not exist in a vacuum. Please be aware that many conventional veterinarians will reject some of these theories, but as a holistic blog, we’d like to offer them to you. By doing so, we hope to enable you to evaluate your situation and make more personalized decisions for your Doberman.
A Brief Overview Of The Condition
Idiopathic head tremors are involuntary, rhythmic movements of the head that resemble a "yes" or "no" motion without other neurological symptoms. These episodes can vary in frequency and duration, often occurring while the dog is at rest. The exact cause of these tremors remains unknown, hence the term "idiopathic." Despite the lack of a definitive cause, this condition is generally considered benign and is believed not to cause pain or distress to the affected dogs.
Interestingly, about two-thirds of dogs will experience what is deemed a spontaneous improvement in the severity or frequency of their tremor episodes. Sometimes, the episodes may completely resolve over time without any specific treatment. While this natural tendency for improvement offers some reassurance to pet owners dealing with this condition, about 1/3 may not improve. Moreover, the idiopathic part of the condition warrants asking oneself how sure a veterinarian can be that the tremors are not part of a more significant issue that, when left ignored, may have an adverse effect on the dog when even the origin of the tremors is deemed unknown and understudied.
1. Genetic Predisposition
Some experts believe that idiopathic head tremors may have a genetic component. Certain breeds, such as Dobermans, Boxers, Bulldogs, and Labrador Retrievers, are more commonly affected by this condition, suggesting a hereditary link. This theory is supported by the observation that head tremors often occur in specific family lines within these breeds. However, as is usually the case with genetic predisposition, environmental factors may play a gene-activating role.
Moreover, some research suggests that the hereditary link is suspected to play a part when the onset of the idiopathic head tremors occurred before the Doberman’s first birthday. The same research also noted a sporadic form that occurs usually after the dog’s first birthday.
2. Neurological Abnormalities
While some pet owners may be drawn to the theory that their dog’s symptoms are related to seizures, research has shown that they are most likely not related. For one, dogs are alert and mobile during the episodes, and they do not respond to medications that are traditionally given for seizures.
One theory, however, suggests that idiopathic head tremors might be related to underlying neurological abnormalities. These could include issues with neurotransmitter function or structural abnormalities in the brain. While there is no concrete evidence pinpointing a specific neurological cause, the involvement of the central nervous system is a plausible explanation, given the nature of the tremors.
As such, two of the most widely accepted theories in conventional veterinary medicine are that idiopathic head tremors may be related to movement disorders originating in the brain's basal ganglia, which is involved in motor control. The other theory posits that an abnormality in the proprioceptive pathways or the stretch mechanism of the head and neck muscles might be responsible. This theory suggests that when the dog’s attention is diverted during an episode, the head tremors temporarily stop because the neck muscles contract, releasing the stretch mechanism that first provoked the tremors. If you’re part of a Doberman group online, you will often see the recommendation to snap your Doberman out of the head tremors by offering them a treat. We can confirm that when Persephone had her head tremors, they did cease with distraction.
3. Diet and Nutritional Imbalances
Diet and nutrition play a crucial role in a dog's overall health, and imbalances could contribute to head tremors. Deficiencies or excesses in specific nutrients, vitamins, or minerals might affect neurological function and lead to tremors. For example, imbalances in calcium, magnesium, or vitamin B complex can affect muscle and nerve function. In conventional veterinary medicine, any reports that nutritional adjustments have helped alleviate head tremors are usually regarded as anecdotal evidence. Hence, it is usually disregarded as not scientific. While it is true that anecdotal evidence cannot serve as factual evidence that nutritional imbalances are a cause for the tremors, they nonetheless could influence the frequency and severity of the condition. Interestingly, many of the statements made to support the argument against such theories are based on anecdotal evidence as well. Hence, there is a chance for bias, the very thing that conventionally trained professionals allege guides people who choose to look at the system as a whole and do not simply accept to live with a symptom no matter how benign it is deemed.
4. Immune System Dysfunction
An overactive or dysregulated immune system is another potential cause of idiopathic head tremors. Inflammation of the nervous system or systemic inflammation could trigger tremors. This theory aligns with our experience with Persephone, where her head tremors appeared to be influenced by immune system challenges that might mediate her reactions to vaccinations and dewormers.
5. Environmental Factors and Toxins
Exposure to environmental toxins, such as pesticides, heavy metals, or chemicals, could potentially lead to head tremors. Dogs that come into contact with these substances might experience neurological symptoms as their bodies attempt to detoxify. This theory is not only particularly relevant for dogs that live in areas with high levels of environmental pollutants but also important in connection with so-called ‘forever chemicals’ that can be found in, for example, everyday cleaning products. While most conventionally trained veterinarians, including neurologists, will remark that tremors caused by toxins will likely not be isolated to the head, there is no definite scientific evidence that idiopathic head tremors are unaffected or worsened by any of these agents. As our integrative vet has remarked, in her experience, chemicals found in, for example, dewormers can affect the severity and frequency of idiopathic head tremors. Thus, while they may or may not be causal factors, they at least may contribute to the condition.
6. Stress and Anxiety
Stress and anxiety are known to have significant impacts on a dog's health, including neurological function. Chronic stress or anxiety could potentially contribute to the development of head tremors. This theory is supported by the observation that some dogs experience tremors more frequently during stressful situations or changes in their environment. It is important to note that we observed significant signs of stress in Persephone when she went through her first two times of deworming. She was heavily irritable, had a more challenging time than usual to settle and rest, especially at night, and she became much more nippy than otherwise. Thus, the question arises whether the chemicals in the dewormer itself influenced the idiopathic head tremor onset or her being highly stressed from the likely uncomfortable sensations of the deworming. In the end, both variables may have contributed as well. Coincidence may have been at play as well. However, the repeated experience after giving her a usually considered less tolerable dewormer and the stark worsening of the condition after that may speak against coincidence.
7. Gastrointestinal Health
There is a growing understanding of the gut-brain axis, highlighting the connection between gastrointestinal health and neurological function. Since a significant portion of the immune system is located in the gut, any imbalance or dysfunction in the digestive system could impact the nervous system. This theory, in part, resonates with our observations of Persephone's past and sometimes flaring-up gastrointestinal issues and the subsequent improvement in her tremors with dietary and gut health interventions.
The Importance of Staying Calm
While the exact cause of idiopathic head tremors remains unknown, these theories can provide valuable insights into potential triggers and contributing factors. Understanding these theories can help you, as a dedicated pet owner, develop more effective management and treatment strategies. We think it is essential to consider a holistic approach, addressing all aspects of a dog's health, including diet, environment, stress levels, and overall well-being, and not just accepting to ignore the issue. After all, veterinary medicine does not know the exact origin of the condition, which offers almost, if not no controlled studies, and, hence, it seems interesting that they deem the issue non-concerning.
We agree with staying calm and not panicking about the condition. The underlying connection to possible problems down the road should be the focus of treatment when improving this symptom because that is what it ultimately is: a symptom of something that is not working properly. We wouldn’t see this deviation from the norm if it weren't an issue.
If your dog is experiencing idiopathic head tremors, consult a knowledgeable (integrative/holistic) veterinarian. Getting a proper diagnosis is crucial. Do not just assume that the head tremors you see are isolated idiopathic head tremors. By seeking a holistic vet, you can get a diagnosis, explore potential causes, and develop a tailored plan for managing the condition instead of ignoring it. Of course, we are not trying to suggest that a holistic veterinarian will know the cause of idiopathic head tremors, but at least they will be more inclined not to ignore the issue.
Disclaimer: The information provided in this article is for educational and informational purposes only and is not intended as a substitute for advice from your veterinarian or other healthcare professional. You should not use this information to diagnose or treat a health problem or disease or prescribe any medication or other treatment. Always consult with your veterinarian or other qualified healthcare provider before making any changes to your pet's healthcare regimen, especially if they have or suspect they may have a health problem. The author and publisher of this article are not responsible for any adverse effects or consequences resulting from the use of any suggestions, products, or procedures mentioned in this article. The use of this information is at the reader's discretion and risk.
Further Reading:
Here are a few scientific articles and sources that you can refer to for more detailed information on idiopathic head tremors in dogs:
1) Imepitoin for treatment of idiopathic head tremor syndrome in dogs: A randomized, blinded, placebo-controlled study:
https://onlinelibrary.wiley.com/doi/full/10.1111/jvim.15955
2) Clinical and Breed Characteristics of Idiopathic Head Tremor Syndrome in 291 Dogs: A Retrospective Study:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4430662/
3) An inherited episodic head tremor syndrome in Doberman pinscher dogs:
https://movementdisorders.onlinelibrary.wiley.com/doi/abs/10.1002/mds.23936
4) Idiopathic and structural episodic nonintentional head tremor in dogs: 100 cases (2004‐2022):
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10658580/
5) Imepitoin for treatment of idiopathic head tremor syndrome in dogs: A randomized, blinded, placebo‐controlled study:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7694850/