Podcast Beta
Questions and Answers
What is the primary structural feature of the sphenoid bone that houses the pituitary gland?
How many greater wings are present in the sphenoid bone?
Which of the following is NOT a part of the sphenoid bone?
The sphenoid sinuses are located beneath which feature?
Signup and view all the answers
What is the orientation of the pterygoid processes in relation to the body of the sphenoid bone?
Signup and view all the answers
Which of the following structures passes through the optic canal of the sphenoid bone?
Signup and view all the answers
What shape do the lesser wings of the sphenoid bone have?
Signup and view all the answers
Which of the following is the correct term for the central part of the sphenoid bone?
Signup and view all the answers
Which cranial fossa does the sphenoid bone help form?
Signup and view all the answers
In addition to forming part of the skull, the sphenoid bone is involved in the structure of which cavity?
Signup and view all the answers
What does the lateral plate contribute to in the skull?
Signup and view all the answers
Which foramen transmits the maxillary division of the trigeminal nerve?
Signup and view all the answers
What is the shape and size of the medial plate mentioned in the content?
Signup and view all the answers
Which muscles are associated with the medial and lateral pterygoid plates?
Signup and view all the answers
The medial plate is positioned relative to which other anatomical feature?
Signup and view all the answers
Which cranial fossa does the foramen rotundum open into?
Signup and view all the answers
What characteristic feature distinguishes the lateral plate?
Signup and view all the answers
What role does the pterygopalatine fossa play in relation to the trigeminal nerve?
Signup and view all the answers
Which plate is shorter and has a different function than the lateral plate?
Signup and view all the answers
Which structure serves as an origin point for several important cranial nerves?
Signup and view all the answers
Study Notes
Sphenoid Bone
-
The sphenoid bone is an irregular, paired bone that contributes to the base and sides of the skull, the floor of the middle cranial fossa, and the nasal cavity.
-
The sphenoid bone is comprised of four main parts:
- Body: Located centrally and houses the pituitary gland in a saddle-shaped depression called the sella turcica. The sphenoid sinuses, located beneath the sella turcica, drain into the nasal cavity.
- Lesser Wings: Two thin, triangular plates that project superolaterally from the anterior aspect of the body. The lesser wings contain the optic canal, which transmits the optic nerve and ophthalmic artery.
- Greater Wings: Two triangular wings that project posterolaterally from the body. They contribute to the floor of the middle cranial fossa, the lateral wall of the skull, and the orbital floor.
-
Pterygoid Processes: These extend from the posterior surface of the body and consist of two plates:
- Lateral Plate: Wider and shorter, serving as the origin of the medial and lateral pterygoid muscles.
- Medial Plate: Smaller, inner, and hook-shaped.
-
Each greater wing contains three foramina:
- Foramen Rotundum: Transmits the maxillary division of the trigeminal nerve to the pterygopalatine fossa.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Explore the structure and parts of the sphenoid bone, an essential component of the skull's base and sides. Learn about its four main sections: the body, lesser wings, greater wings, and pterygoid processes, along with their functions and importance in cranial anatomy.
