Ultrasonographic investigation of the atlanto-occipital articulation in the horse.

The researchers carried out this study to assess the effectiveness of ultrasonographic imaging for diagnosing joint and surrounding structures of the horse’s atlanto-occipital articulation, and to find a safer approach to this joint. They concluded that ultrasonography of the neck is a useful, easy, and safe method. However, they suggested more research on live subjects.

Ultrasonographic Investigation and Methodology

• The study was conducted on 6 healthy horses and 16 horse specimens. The specimens were taken from horses that were humanely destroyed, aged between 2 and 17 years with an average age of 9.56 years.
• Preliminary examinations included studying the anatomy of the joint and preparing cross-sections for detailed examination.
• On 4 horse specimens, punctures of the atlanto-occipital joint were performed under ultrasonographic guidance and a new lateral approach was implemented.
• Their examination divided the neck into four anatomical and clinical zones: insertion of the funiculus nuchae; tuberculum dorsale of the atlas; the atlanto-occipital joint; and the region above the foramen alare.
• These zones were then examined in both transverse and longitudinal planes, starting from the cranial to the caudal end.

Analyzing Results and Conclusion

• Ultrasonography was revealed to be beneficial for soft tissue imaging, and performed down to the atlanto-occipital joint.
• The researchers were able to delineate joint surfaces, joint capsule, and the collateral ligament in both planes using ultrasound technology.
• The researchers concluded that ultrasonography of the neck is a useful technique and represents a safe and easy method for examining the atlanto-occipital articulation in the horse.
• Despite these positive results, the researchers believe that more studies are needed, specifically those performed on live horses, to further validate their findings.