Frontal Bone Shown (Head And Neck, Sagittal Section)

Description

Anteriorly, the frontal bone forms the forehead and the superior orbital margin, and in this midline sagittal section its internal table and diploic space are cut to expose the frontal sinus as an air-filled cavity superior to the nasal cavity. Posterior to the frontal bone, the parietal bone and occipital bone complete the calvaria, while the temporal bone contributes to the lateral skull base in profile. Inferiorly, the mandible with dentition sits anterior to the upper cervical spine, with the atlas (C1) and axis (C2) aligned directly beneath the occipital region. A separate hyoid bone lies inferior to the mandibular body, anterior to the cervical vertebrae. Sagittal anatomy of the frontal bone and frontal sinuses matters when you need to orient sinonasal drainage pathways and adjacent neurovascular and intracranial compartments. The frontal sinus outflow tract courses inferiorly toward the middle meatus via the frontonasal recess, a relationship that explains patterns of frontal sinusitis and the potential for orbital or intracranial spread when infection tracks posteriorly toward the anterior cranial fossa. For operative planning, this slice also supports discussion of the bicoronal approach, frontal craniotomy, and endoscopic frontal sinus surgery, where the thickness of the anterior table and the proximity to the orbit set the margins of safe dissection. Landmarks are clear. Use this illustration in gross anatomy and head and neck anatomy teaching to anchor the concept of sagittal planes while integrating bone, sinus, and upper cervical relationships in one frame. It also suits ENT and neurosurgical texts, consent materials for frontal sinus procedures, and radiology teaching that correlates midsagittal CT or MRI with bony anatomy. Anatomical accuracy verified by SciePro's Medical Advisory Board.