The lesser wings of the sphenoid or orbito-sphenoids are two thin triangular plates, which arise from the upper and anterior parts of the body, and, projecting lateralward, end in sharp points [Fig. 1]. In some animals, they remain as separate bones called orbitosphenoids.

2025年1月11日 · The lesser wing of the sphenoid bone, or orbito-sphenoid, is a sharp, pointed triangular plate arising laterally from the upper anterior portion of the sphenoid body. Gross anatomy. The lesser wing features both superior and inferior surfaces: the superior surface is flattened and is in contact with the frontal lobe of the brain

2024年1月3日 · Lesser Wing The lesser wing arises from the anterior aspect of the sphenoid body in a superolateral direction. It separates the anterior cranial fossa from the middle cranial fossa.

2023年10月30日 · The body and lesser wings of the sphenoid bone mature through classic endochondral ossification, whereas the pterygoid processes undergo intramembranous ossification. The development of the greater wings of the sphenoid bone are exceptional since they are the only bony structures of the skull which go through both endochondral and ...

The sphenoid bone (also called the sphenoid, sphenoidal bone, Latin: os sphenoidale) is a single bone that lies in the base of the skull between the frontal, temporal and occipital bones. The sphenoid bone has a central body, and paired greater wings and lesser wings that extend laterally from the body of the sphenoid.

2019年6月10日 · Lesser Wing . The lesser wings or orbitosphenoids are paired thin triangular plates that extend laterally from the planum sphenoidale. Medially they arise from the anterior and superior sphenoid body at two roots. These roots define the optic canal ( Figs. 3.2–3.5 ), which transmits the optic nerve and ophthalmic artery. It is the only canal ...

The small wings or orbito-sphenoids are two thin triangular plates, which arise from the upper and anterior parts of the body, and, projecting lateralward, end in sharp points. Surfaces. —The superior surface of each is flat, and supports part of the frontal lobe of the brain.

2023年7月24日 · The two lesser wings of the sphenoid are present anterior to the body and are triangular. The two greater wings of the sphenoid are also triangular in shape and are lateral to the body. The pterygoid process is directed downwards and made up …

2021年4月27日 · The sphenoid bone’s body and lesser wings mature via classic endochondral ossification, while the pterygoid processes mature via intramembranous ossification. The formation of the greater wings of the sphenoid is unique because they are the only bony elements of the skull that undergo both endochondral and intramembranous ossification.

2022年11月7日 · Lesser wing (ala minor sphenoidalis) is the smaller of two wing-like lateral extensions that arise from the sides of the sphenoid body. The lesser wings are flattened, triangular in shape, and located above and anterior to the greater wings.