• Ahmet Payas, Fatih Çiçek, Yakup Ekinci, Sabri Batın, Şule Göktürk, Yasin Göktürk, Caner Karartı, and İlyas Uçar.
• Faculty of Medicine, Department of Anatomy, Amasya University, Amasya, Turkey.
• Eur Spine J. 2024 Dec 1; 33 (12): 470247094702-4709.

Study DesignCross-sectional Study.BackgroundIt is not yet clear whether the loss of proprioceptive sensation and muscle weakness seen in adolescent idiopathic scoliosis (AIS) is the result of central nervous system dysfunction or secondary to spinal deformity. In our study, in order to find an answer to this question, we examined the microarchitecture of the nervus trigeminus, which is least affected by spinal deformity and contains both proprioceptive sensory and motor fibers.MethodsIn this single-center, cross-sectional cohort study, 40 Lenke Type 3 (27 female, 13 male) AIS patients and 40 (25 female, 15 male) healthy individuals between the ages of 10-18 years. Tractography of the nervus trigenimus was performed using the "DSI Studio" program. The volumes of the targeted musculus pterygoideus lateralis and musculus pterygoideus medialis were measured using the Insight Segmentation and Registration Tool Kit (ITK -SNAP) program. The data were evaluated using the Statistical Package for the Social Sciences 22.0 program for Windows.ResultsThere was no significant difference between the two groups in terms of baseline characteristics (p˃0.05). Left nervus trigeminus fiber number and fiber ratio were significantly higher in the control group compared to the scoliosis group p < 0.05. Right and left lateral pterygoid muscle showed lower volume and volume percentage in the scoliosis group compared to the control group (p < 0.05).ConclusionAccording to the study data, proprioceptive sensory and motor control dysfunction in AIS is predicted to develop independently of spinal deformity.© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

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