Paul Roblot1,2, Etienne Lefevre3,4, Romain David5, Jade Le Quilliec6, Lorenzo Mongardi7,6, Laurent Denat8, Thomas Tourdias8,9, Dominique Liguoro7,10, Jean-Rodolphe Vignes7,6, Vincent Jecko7,10. 1. Department of Neurosurgery A, University Hospital of Bordeaux, Place Amélie Raba-Léon, 33076, Bordeaux, France. paul.roblot@chu-bordeaux.fr. 2. Laboratory for Experimental Surgery, DETERCA Pr Vignes, University of Bordeaux, Bordeaux, France. paul.roblot@chu-bordeaux.fr. 3. Department of Neurosurgery, APHP, Hôpital de La Pitié-Salpêtrière, 75013, Paris, France. 4. Sorbonne Université, Paris, France. 5. Physical and Rehabilitation Medicine Unit, PRISMATICS Lab (Predictive Research in Spine/Neuromodulation Management and Thoracic Innovation/Cardiac Surgery), Poitiers University Hospital, University of Poitiers, 86000, Poitiers, France. 6. Laboratory for Experimental Surgery, DETERCA Pr Vignes, University of Bordeaux, Bordeaux, France. 7. Department of Neurosurgery A, University Hospital of Bordeaux, Place Amélie Raba-Léon, 33076, Bordeaux, France. 8. Institute of Bioimaging, University of Bordeaux, 33000, Bordeaux, France. 9. Department of Diagnostic and Therapeutic Neuroimaging, Pellegrin Hospital, place Amélie-Raba-Léon, 33000, Bordeaux, France. 10. Laboratory of Anatomy, University of Bordeaux, 33000, Bordeaux, France.
Abstract
PURPOSE: In a previous cadaveric work, we identified and described useful and reproducible surface skin landmarks to lateral sulcus, central sulcus and preoccipital notch. Potential limitations of this cadaveric study have been raised. Thus, the objective of this study was to confirm radiologically the accuracy of these previously described surface skin landmarks on brain magnetic resonance imaging (MRI) of healthy subjects. METHODS: Healthy adult volunteers underwent a high-resolution brain MRI and measurements of the orthogonal skin projection (OSP) of the anterior sylvian point (AsyP), the superior Rolandic point (SroP) and the parietooccipital sulcus were made from nasion, zygomatic bone and inion, respectively. These measures were compared to our previous cadaveric findings. RESULTS: Thirty-one healthy volunteers were included. ASyP was 33 ± 2 mm above the zygomatic arch, and 32.3 ± 3 mm behind the orbital rim. The lateral sulcus was 63.5 ± 4 mm above the tragus. The SRoP was 196.9 ± 6 mm behind the nasion. The superior point of the parietooccipital sulcus was 76.0 ± 4 mm above the inion. These measurements are comparable to our previously described cadaveric findings. CONCLUSION: We here described three useful, simple and reproducible surface skin landmarks to lateral, central and parietooccipital sulci. Knowledge of these major landmarks is mandatory for Neurosurgical practice, especially in an emergency setting.
PURPOSE: In a previous cadaveric work, we identified and described useful and reproducible surface skin landmarks to lateral sulcus, central sulcus and preoccipital notch. Potential limitations of this cadaveric study have been raised. Thus, the objective of this study was to confirm radiologically the accuracy of these previously described surface skin landmarks on brain magnetic resonance imaging (MRI) of healthy subjects. METHODS: Healthy adult volunteers underwent a high-resolution brain MRI and measurements of the orthogonal skin projection (OSP) of the anterior sylvian point (AsyP), the superior Rolandic point (SroP) and the parietooccipital sulcus were made from nasion, zygomatic bone and inion, respectively. These measures were compared to our previous cadaveric findings. RESULTS: Thirty-one healthy volunteers were included. ASyP was 33 ± 2 mm above the zygomatic arch, and 32.3 ± 3 mm behind the orbital rim. The lateral sulcus was 63.5 ± 4 mm above the tragus. The SRoP was 196.9 ± 6 mm behind the nasion. The superior point of the parietooccipital sulcus was 76.0 ± 4 mm above the inion. These measurements are comparable to our previously described cadaveric findings. CONCLUSION: We here described three useful, simple and reproducible surface skin landmarks to lateral, central and parietooccipital sulci. Knowledge of these major landmarks is mandatory for Neurosurgical practice, especially in an emergency setting.
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