What makes the sphenoid bone different?

The sphenoid bone has articulations with twelve other paired and unpaired bones – this makes it the most complex bone in the human body. While the sphenoid bone is unpaired, it stretches from one side of the skull to the other. Its articulations are with the: Temporal bones (paired)

What is unique about the sphenoid bone quizlet?

Bat shaped bone that is described as the keystone bone of the cranium because it articulates with the cranial bones.

Why is sphenoid bone single?

The sphenoid is just one of the twenty-two bones that form the skull and essentially helps to connect the neurocranium to the facial skeleton. It is a single bone in the midline of the cranial cavity situated posterior to the frontal bone but anterior to the occipital.

Why is the sphenoid bone important to vision?

The greater and lesser wings are processes of bone that extend outward. … The lesser wings and the body of the sphenoid form the optic canal. It is through this canal that the optic nerve (II) passes from the brain to the eyes.

What type of bone is the sphenoid?

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.
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Sphenoid bone
TA2 584
FMA 52736
Anatomical terms of bone

What type of bone is the sphenoid bone quizlet?

a compound bone that forms the base of the cranium, behind the eye and below the front part of the brain. It has two pairs of broad lateral “wings” and a number of other projections, and contains two air-filled sinuses.

What brain structure does the sphenoid protect?

Sphenoid bone primarily consists of a centrally positioned body, which surrounds and protects the pituitary gland, and two sets of lateral, wing-like extensions called the greater and lesser wings.

Can the sphenoid bone move?

Within the brain, the cranial pumping mechanism known to circulate the CSF occurs where the sphenoid bone articulates with the basilar portion of the occiput bone. … This pressure causes the spheno-basilar junction to move slightly posterior and inferior.

What attaches to the sphenoid bone?

On the base of the sphenoid bone, several muscles attach to it’s legs, the medial and lateral pterygoid processes. … Muscles of the soft palate, such as tensor veli palatini and levator veli palatini, also attach to the sphenoid bone.

What landmark is not part of the sphenoid bone?

Identify the landmark that is not part of the sphenoid bone. The olfactory foramina are found in the cribriform plate of the ethmoid bone, not the sphenoid bone.

Which feature of the sphenoid protects the pituitary gland?

sella turcica
The sella turcica of the sphenoid bone protects the pituitary gland from my shocks or damages.

What part of the sphenoid bone forms a depression that the pituitary gland sits in?

sella turcica
The sella turcica is a bony depression in the sphenoid bone. The sella is bordered laterally by the cavernous sinuses, superiorly by the diaphragma sellae (dural fold), anteroinferiorly by the sphenoid sinus, and posteriorly by the pontine cistern. The pituitary gland normally sits within the sella.

What is the weakest part of the skull?

One of the weakest points on the human skull is the ‘temple’ region. This is known anatomically as the pterion (see the image above) and is formed by the junction of the frontal, parietal and sphenoid bones.

What landmark is unique to the femur?

The greater and lesser trochanters are unique to the femur. The linea aspera is an elevated ridge found on the diaphysis of the femur. It serves as a site of muscle attachment.

What is the greater wing of sphenoid bone?

The greater wing or ali-sphenoid of the sphenoid bone is a process which projects from either side of the lower part of the sphenoid body, at a common junction with the pterygoid process 1.

Which bones form the upper jaw?

Each of the following facial bones are paired: the maxillae form the upper jaw and front of the hard palate; the zygomatic bones form the cheeks; the nasal bones form the bridge of the nose; the lacrimal bones form part of the orbit, or eye socket; the palatine bones form the rear of the hard palate and the inferior …

What lies deep pterion?

The pterion is known as ‘the danger area’ on the skull for head injuries. This is because the bone is thin at this site and is grooved by vessels on its internal surface (or may even lie in a bony tunnel here). It is the anterior branch of the middle meningeal artery (and vein) that lies deep to the pterion.

Do skulls have ear holes?

Yes, all mammals and probably all animals have a hole in the skull where the ears are. The ears are on the outside of the skull and the eardrum is still outside the majority of the skull. Since that is where the sound is detected, there has to be a hole for nerves going from the eardrum area to the brain.

What bones hold the teeth?

The alveolar bone is located on the jaw bones which hold the teeth. In humans, these bones that contain the teeth are the maxilla and the mandible. The curved portion of each alveolar process on the jaw is the alveolar arch.

Which bones form the cheeks?

zygomatic bone, also called cheekbone, or malar bone, diamond-shaped bone below and lateral to the orbit, or eye socket, at the widest part of the cheek. It adjoins the frontal bone at the outer edge of the orbit and the sphenoid and maxilla within the orbit.

What is the nose bone?

The nasal bones are two oblong halves that meet to form the bridge of your nose. The nasofrontal suture, which is a rigid fibrous joint that connects the two halves of the nasal bones, forms the thickest part of the nose.

What is a gold tooth?

Gold teeth are a form of dental prosthesis where the visible part of a tooth is replaced or capped with a prosthetic molded from gold.

Where is sphenoid bone?

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.