What passes through the occipital bone?

What passes through the occipital bone?

The foramen magnum is part of the occipital bone, through which the medulla oblongata, the accessory nerves, the anterior and posterior spinal arteries, the vertebral arteries, the alar ligaments, and the tectorial membranes passes.

What is found on the occipital bone?

The two upper depressions are triangular-shaped and embed the occipital lobes of the cerebrum, the largest part of the brain. The lower two depressions are rectangular and contain the hemispheres of the cerebellum, the part of the brain that receives information.

How do you recognize the occipital bone?

It is trapezoidal in shape and curved on itself like a shallow dish. The occipital bone overlies the occipital lobes of the cerebrum. At the base of skull in the occipital bone, there is a large oval opening called the foramen magnum, which allows the passage of the spinal cord.

What are the four parts of occipital bone?

Embryology of the Skull Base. The occipital bone is one of the first bones of the skull to develop and consists of four parts, namely, one basilar, one squamous, and two condylar parts, that encircle the foramen magnum.

What is the occipital lobe responsible for?

The parietal lobe processes information about temperature, taste, touch and movement, while the occipital lobe is primarily responsible for vision.

Does the occipital bone move?

The occiput and the mastoid part of the temporal bone normally move in opposing directions to each other: in the inspiration phase the border of the occiput moves in an anterior direction, while the border of the mastoid part slides posterior.

What is the number of occipital bones are present in human body?

Cranial Bones. The neurocranium is comprised of eight bones: occipital, two temporal bones, two parietal bones, sphenoid, ethmoid, and the frontal bone.

Is occipital bone irregular?

This is a pair of irregular bones located under each of the parietal bones. Occipital 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.

What is back of head called?

occipital bone
The occipital bone is a bone that covers the back of your head; an area called the occiput. The occipital bone is the only bone in your head that connects with your cervical spine (neck).

What is occipital Calvarium?

The calvaria is the top part of the skull. It is the upper part of the neurocranium and covers the cranial cavity containing the brain. It forms the main component of the skull roof. The calvaria is made up of the superior portions of the frontal bone, occipital bone, and parietal bones.

How does the occipital lobe affect behavior?

Injury to the occipital lobes may lead to vision impairments such as blindness or blind spots; visual distortions and visual inattention. The occipital lobes are also associated with various behaviors and functions that include: visual recognition; visual attention; and spatial analysis.

Where is the occipital bone located?

The occipital bone is located on the back of the cranium and includes the following features: • Internally, it forms the posterior cranial fossa where the occipital lobe of the brain sits. • It contains the foramen magnum – the passageway between the vertebral column and the cranial cavity.

Where is the occipital artery located in the skull?

The occipital artery rises between the transverse process of the atlas located in the neck and the mastoid process located in the back part of the temporal bone, situated just behind the ear. The temporal bones are found at the sides (temples) and bones of the skull. They also house the structures of the ears.

What happens if the occipital bone is dislocated?

When the joint between the occipital bone and C1 becomes dislocated the result is often death. This is because the brainstem runs alongside the joint. Any fracture around the foramen magnum is a medical emergency, although reparative surgery is complex.

When do the parietal and occipital bones fuse?

Then, between the ages of 26 and 40, the parietal bones at the top of your head and occipital bone will fuse together. At the base of your skull there is a large oval opening in the occipital bone that is called the foramen magnum.