Table of Contents
What separates anterior and middle cranial fossa?
The lesser wing of the sphenoid bone separates the anterior and middle cranial fossae. The petrous ridge (petrous portion of temporal bone) separates the middle and posterior cranial fossae.
What bones are in the anterior cranial fossa?
Anterior Cranial Fossa: Formed anterolaterally by the frontal bone, inferiorly by the orbital plates and the anterior portion of the body of the sphenoid, medially by the cribriform plate of the ethmoid bone, and posteriorly by the lesser wings of the sphenoid bone.
What are the contents of cranial cavity?
The cranial cavity houses the Brain, Meninges, and the Cerebrospinal Fluid. The primary function of the brain is supplying information to the rest of the body and to help it function as whole.
Which part of the brain occupies the anterior cranial fossa?
frontal lobes
-Anterior Cranial Fossae The orbital part of the frontal bone, the cribriform plates of the ethmoid bone with the crista galli, and the lesser wings and jugum of the sphenoid bone form the anterior cranial fossa. It is occupied mainly by the frontal lobes of the cerebral hemispheres of the brain.
What lies in the middle cranial fossa?
The middle cranial fossa consists of a central portion, which contains the pituitary gland, and two lateral portions, which accommodate the temporal lobes of the brain.
Which opening is present in the middle cranial fossa?
foramen lacerum
The foramen lacerum is a paired opening between the middle cranial fossa and the external surface of the cranial base. The foramen lacerum is filled with cartilage after birth and it transmits the artery and nerve of the pterygoid canal.
What are the boundaries of the anterior cranial fossa?
The anterior cranial fossa is bounded anteriorly and laterally by the frontal bone, inferiorly by the orbital plate of the frontal bone, the cribriform plate and crista galli of the ethmoid bone, and by the lesser wings and the anterior aspect of the body of the sphenoid.
What is found in the middle cranial fossa?
The middle cranial fossa consists of a central portion, which contains the pituitary gland, and two lateral portions, which accommodate the temporal lobes of the brain. Both parts of the fossa are marked by numerous bony landmarks, which will be discussed below.
What are the names of the three cranial fossae?
The floor of the cranial cavity is divided into three distinct depressions. They are known as the anterior cranial fossa, middle cranial fossa and posterior cranial fossa. Each fossa accommodates a different part of the brain.
What organs can be found in the cranial cavity?
The cranial cavity is the anterior portion of the dorsal cavity consisting of the space inside the skull. This cavity contains the brain, the meninges of the brain, and cerebrospinal fluid.
What passes through the middle cranial fossa?
The optic canals are situated anteriorly in the middle cranial fossa. They transmit the optic nerves (CN II) and ophthalmic arteries into the orbital cavities. The optic canals are connected by the chiasmatic sulcus, a depressed groove running transversely between the two.
What does the middle cranial fossa control?