Is the sphenoid bone in the skull?
The sphenoid bone (wasp bone) is part of the base of the skull. An unpaired bone located in the cranium (or skull), the sphenoid bone, also known as the “wasp bone,” is located in the middle and toward the front of the skull, just in front of the occipital bone.
What is the function of sphenoid bone?
Structure and Function Sphenoid bone has many essential functions. It helps form the base and lateral sides of the skull in combination with the orbital floor. Its many articulations with other bones give the skull rigidity. It is an attachment site for many of the muscles of mastication.
Why is the sphenoid bone considered the key bone of the skull?
Sphenoid bone: A prominent, irregular, wedge-shaped bone at the base of the skull. The sphenoid bone has been called the ‘keystone’ of the cranial floor because it is in contact with all of the other cranial bones.
What are the main features of the sphenoid bone?
There are four main parts to the sphenoid bone: the body (corpus), the lesser and greater wings (alae minores et majores) and the pterygoid processes.
What type of bone is the sphenoid?
The sphenoid bone is an unpaired bone of the neurocranium. It is situated in the middle of the skull towards the front, in front of the basilar part of the occipital bone. The sphenoid bone is one of the seven bones that articulate to form the orbit.
Is the sphenoid bone part of the temporal bone?
The temporal bones are situated at the sides and base of the skull, and lateral to the temporal lobes of the cerebral cortex….
| Temporal bone | |
|---|---|
| Articulations | Occipital, parietal, sphenoid, mandible and zygomatic |
| Identifiers | |
| Latin | Os temporale |
| MeSH | D013701 |
What nerves go through the sphenoid bone?
The oculomotor, trochlear, and abducens nerves; the first division of the trigeminal nerve; and the optic vein pass through the superior orbital fissure. The borders of the superior orbital fissure are the ala minor and major, and medially the body of the sphenoid bone.
What type of bone is the sphenoid bone?
unpaired bone
The sphenoid bone is an unpaired bone of the neurocranium. It is situated in the middle of the skull towards the front, in front of the basilar part of the occipital bone. The sphenoid bone is one of the seven bones that articulate to form the orbit….
| Sphenoid bone | |
|---|---|
| MeSH | D013100 |
| TA98 | A02.1.05.001 |
| TA2 | 584 |
| FMA | 52736 |
Is the sphenoid bone a flat bone?
This is a flat bone located in the very back of your skull. It has an opening that allows your spinal cord to connect to your brain. Sphenoid bone.
What is unique about the sphenoid?
What’s particularly unique about the sphenoid bone, is that on its cranial surface, the body has a deeply concave surface called the sella turcica. It is bordered by the anterior, middle and posterior clinoid processes, which are points of attachment for the dura mater of the brain.
What is the sphenoid bone look like?
The sphenoid bone is said to be ‘butterfly-shaped’. It consists of a body, paired greater wings and lesser wings, and two pterygoid processes.
How many sphenoid bones are in the skull?
The sphenoid bone is an unpaired bone of the neurocranium. It is situated in the middle of the skull towards the front, in front of the basilar part of the occipital bone. The sphenoid bone is one of the seven bones that articulate to form the orbit….
| Sphenoid bone | |
|---|---|
| TA2 | 584 |
| FMA | 52736 |
| Anatomical terms of bone |
Why is sphenoid bone called Keystone?
The sphenoid bone has been called the ‘keystone’ of the cranial floor because it is in contact with all of the other cranial bones. The sphenoid bone is one of the seven bones that articulate to form the orbit.
Which bones does the sphenoid bone articulate with?
The sphenoid is an unpaired bone. It sits anteriorly in the cranium, and contributes to the middle cranial fossa, the lateral wall of the skull, and the floor and sides of both orbits. It has articulations with twelve other bones: Unpaired bones – Occipital, vomer, ethmoid and frontal bones .
Is the sphenoid bone part of the facial skeleton?
Elements of the cartilaginous viscerocranium (i.e., splanchnocranial elements), such as the hyoid bone, are sometimes considered part of the facial skeleton . The ethmoid bone (or a part of it) and also the sphenoid bone are sometimes included, but otherwise considered part of the neurocranium.
What shape of bone is the sphenoid bone?
The sphenoid bone is said to be ‘ butterfly-shaped ‘. It consists of a body, paired greater wings and lesser wings, and two pterygoid processes. The body lies at the centre of the sphenoid bone, and is almost completely cubical in shape. Sep 21 2019