Historically, bone health was regarded predominantly through the lens of calcium metabolism and physical activity. The traditional understanding placed limited emphasis on the nervous system’s role in regulating bone turnover. Recent insights leverage advancements in neuroscience to reveal that bones are not merely structural entities but dynamic tissues influenced extensively by an intricate network of signals originating from the nervous system. This paradigm shift opens several unexplored pathways for therapies aimed at treating osteoporosis and related skeletal disorders more effectively.

The authors’ investigation delineates the mechanisms through which both central and peripheral nervous systems contribute to bone regulation. Central nervous system factors include neural circuits originating from brain regions known to influence appetite and energy expenditure, which were previously underappreciated in their role concerning the skeletal system. Through pathways such as the sympathetic nervous system and parasympathetic responses, neural signaling evidently dictates osteoblast and osteoclast functions, balancing bone formation and resorption.

Among the peripheral components highlighted, sensory and sympathetic nerves within the bone marrow show surprising interactions with immune cells, significantly impacting bone remodeling processes. Calcium and phosphate levels, crucial for bone health, depend on efficient signaling between these neural factors and the endocrine system. By understanding these intricate communication patterns, the potential arises to create targeted interventions that can mitigate age-related bone loss or treat metabolic bone diseases.

Furthermore, the study posits that the collaboration between neurotrophic factors and bone-regulating hormones provides a fertile ground for pharmaceutical advancements. For instance, the role of brain-derived neurotrophic factor (BDNF) in promoting osteoblast function presents a promising target for drug developments. Leveraging the body’s own biological mechanisms rather than introducing foreign substances could result in fewer side effects and enhanced efficacy in treatments for bone pathologies.

The implications extend beyond merely therapeutic strategies; they suggest a holistic approach to patient care. Understanding the link between mental health, stress levels, and bone density could lead practitioners to adopt more comprehensive assessment and treatment frameworks. This psychosomatic relationship highlights that patients experiencing chronic stress or mental health disorders may also be at increased risk of weaker bones. Mental wellness could thus become an integral component of osteological health assessments.

Research also suggests that lifestyle factors, coupled with genetic predispositions, influence the nervous system’s effect on bone health. A sedentary lifestyle, for example, has been shown to negatively affect neurological signaling pathways, which in turn can lead to decreased bone density. Enabling patients to engage in more active lifestyles can serve as a preventive measure against osteoporosis, reinforcing the importance of exercise not only for muscle strength but for maintaining healthy bones through neurological health.

As therapeutic insights begin to unfold, the possibility of developing biomimetic drugs that mimic or enhance neuro-osteogenic factors gains traction. The exploration of natural compounds that can enhance nerve signaling to bones is an exciting frontier. Bioactive molecules found in certain foods or supplements could be harnessed to foster better communication between nervous and skeletal systems, heralding a new era of integrative medicine.

The researchers underscore the necessity of more comprehensive clinical trials to validate these mechanisms in human subjects. Observational studies that link neural health with bone density measurements could solidify the theoretical framework, leading to evidence-based practices that incorporate mental and neural health as integral to skeletal wellness. Moreover, understanding individual variance in response to treatment could spur personalized medicine approaches that cater to specific neurological profiles.

The potential for adversities from pharmacological treatments should not be overlooked. Analyzing how existing medications affect not just the bone directly, but also the neural pathways contributing to bone health, is imperative for clinicians. By identifying and mitigating potential side effects of commonly prescribed drugs, healthcare providers could enhance treatment efficacy while minimizing risks.

This multi-faceted approach to bone health, with an emphasis on the central and peripheral nervous systems, has far-reaching implications. It not only offers hope for more effective therapies in managing bone ailments but also champions a broader recognition of how interconnected our biological systems truly are. Advancements in neuroscience, combined with ortho-therapeutics, might just be the key to unlocking robust treatments for conditions that compromise skeletal strength.

In conclusion, Liang, TZ., Jin, ZY., and Lin, YJ. have paved the way for a paradigm shift in our understanding of bone health through their exploration of neurobiological mechanisms. Their findings not only challenge traditional models of bone treatment but also open a multidisciplinary avenue for future research. As academia continues to unravel the complexities of these interactions, the quest for optimal strategies to combat bone-related ailments is poised to benefit countless individuals at risk.

The potential for integration of these strategies into routine clinical practice echoes a growing trend in modern medicine: the move towards holistic, patient-centered care. By acknowledging the significant role of the nervous system in skeletal health, researchers and clinicians alike can work towards innovative therapies that harness the body’s natural systems for better health outcomes.

The horizon is bright for those suffering from bone diseases, and with further investigation into this fascinating intersection of neurology and orthopedics, we may soon witness the development of treatments that not only alleviate the symptoms but also address the root causes of bone-related disorders, fundamentally changing the landscape of orthopedic care.

Subject of Research: The influence of the central and peripheral nervous systems on bone homeostasis and potential therapeutic strategies.

Article Title: Targeting the central and peripheral nervous system to regulate bone homeostasis: mechanisms and potential therapies.

Article References:

Liang, TZ., Jin, ZY., Lin, YJ. et al. Targeting the central and peripheral nervous system to regulate bone homeostasis: mechanisms and potential therapies.
Military Med Res 12, 13 (2025). https://doi.org/10.1186/s40779-025-00600-8

Image Credits: AI Generated

DOI: 10.1186/s40779-025-00600-8

Keywords: Bone homeostasis, nervous system, osteoblast, osteoclast, neurotrophic factors, osteoporosis, therapeutic strategies, skeletal health, personalized medicine.

“Bone is a dynamic tissue that responds to external stimuli, so changes in bone structure provide great clues about where and how a person lived and died,” Smith-Guzmán said. “When I looked at an additional 125 skulls from nine burial sites across Panama, I found seven cases of surfers’ ear in males and one in a female skull, all from sites near the Gulf of Panama.”

No one really understands exactly how the bony growths, technically called exostoses, form. But the skin is thin in the ear canal and the accepted theory is that cold water or cold temperatures caused by wind and water make the bone react by growing extra layers, similar to the way bone spurs form on the feet and in other places where there is constant irritation or stress. Almost half of the members of a swimming club in England had surfer’s ear according to a report cited in the study.

Unlike most tropical countries where seawater is warm, water temperature in the Gulf of Panama plummets between January and April when strong trade winds from the north force warm surface water out into the Pacific and colder, deep water rises to the surface to replace it. This deep, nutrient-rich water feeds tiny sea organisms, which in turn are eaten by fish and whales. The Gulf becomes an extraordinarily productive fishing ground supporting a thriving fishing industry and attracting dolphins, sharks and other top-of-the-food-chain animals.

Years ago, when co-author Richard Cooke, zooarchaeologist at STRI, unearthed a male skeleton with surfer’s ear in Sitio Sierra, near Aguadulce in Panama, he was a STRI post-doctoral student with only rudimentary knowledge of physical anthropology. But he collected all of the human remains he found, enabling Nicole-Smith Guzmán to reexamine them 43 years later.

Cooke spent much of his career studying ancient fishing practices. He found that Panama’s pre-Columbian peoples fished from boats all along both the Pacific and Caribbean coasts of Panama. If fishing alone put people at higher risk for surfer’s ear, then more cases of the bony growth would be present at all of the sites, but all of the examples came from areas near the Gulf.

“We think it more likely that diving in the cold waters of the Gulf caused these cases of surfer’s ear,” Smith-Guzmán said. “Silvery mother-of-pearl ornaments, and orange and purple ones from two large ‘thorny’ oysters in the Spondylus genus were common in burials and comprised an important trade item in the region. Some of these shells wash up on beaches, but by the time Vasco Nuñez de Balboa and other Spanish explorers arrived, their chronicles tell us that expert divers were trained from childhood to dive down to four fathoms to retrieve pearl oysters of desirable large size.”

The Spanish encouraged this industry and for many years, Panama was known for its pirates and pearls, including La Peregrina, the largest pearl known at the time it was found.

The team also ruled out fungal or bacterial ear infections common in the tropics that sometimes cause bone deformations: most of the skulls affected were from males, and infections should occur in both male and females at about the same rate. From the evidence they have so far, it looks like mostly males were involved in whatever activity caused surfer’s ear in Panama. In another study, archaeologists in the Canary Islands found roughly equal numbers of cases of surfer’s ear in ancient male and female skulls, suggesting that aquatic activities there were not restricted to one gender.

“I spoke to one ear, nose and throat specialist in Panama and she has never seen a case of surfer’s ear here, but we want to do a follow-up study in which we look at skulls from a much wider area and also do a survey of doctors in Panama to find out if surfers or divers ever show up with surfer’s ear these days,” Smith-Guzmán said.

Surfer’s ear is an intriguing subject that archaeologists, anthropologists and medical doctors have explored for more than a century. Although the exact causes of this phenomenon is still debated, these bony growths offer important clues into the cultural activities, gendered division of labor and environmental conditions in the past.

Surfer’s ear points to ancient pearl divers in Panama
Smithsonian Tropical Research Institute

Journal
American Journal of Physical Anthropology
Funder
Smithsonian Tropical Research Institute
DOI
10.1002/ajpa.23757