Sphenoid bone

Study entry

Parts

Unpaired, irregular bone, wedged between the frontal, the temporals and the occipital: a body (with the sphenoidal sinus) and three pairs of processes (greater wings, lesser wings and pterygoid processes).

Joints

With the occipital behind (synchondrosis in childhood), the frontal, the ethmoid, the parietals and the temporals (at the pterion, the greater wing) and the zygomatics.

Source: cap. 8, «Cráneo» y «Cráneo: fosas craneales» y tabla 8-2

Other structures in this region

• Thyroid cartilage
• Cricoid cartilage
• Arytenoid, corniculate and cuneiform cartilages
• Epiglottis (epiglottic cartilage)
• Membranes and ligaments of the larynx (conus elasticus and quadrangular membrane)
• Frontal bone
• Parietal bone
• Occipital bone