The dens articulates with the occipital bone. Costal cartilages join most ribs to the sternum. The anatomy of the thoracic cage provides ridged support and protection but at the same time is also flexible and mobile.
What does the occipital bone articulate with?
The occipital bone is set at the rear of the cranium and articulates with the temporals, sphenoid, parietals, and the uppermost vertebra, the atlas. a. The foramen magnum is the large hole in the occipital through which the brainstem passes inferiorly into the vertebral canal.
The occipital bone is the only cranial bone to connect to the cervical spine. It has many important functions, but its most important role is in protecting your brain.
What bone articulates with the occipital condyles?
Context: The occipital condyles of the skull articulate with the superior articular facets of the atlas vertebra and form an important junction between the cranium and the vertebral column.
On the superior surface of the atlas bone are a pair of concave facets. The facets articulate with rounded condyles on the underside of the skull’s occipital bone. This junction allows the head to nod up and down.
Which bone articulates with the skull?
The two large parietal bones are connected and make up part of the roof and sides of the human skull. The two bones articulate to form the sagittal suture. In the front, the parietal bones form the coronal suture with the frontal bone, and in the rear, the lambdoid suture is formed by the occipital bone.
Where is the Lambdoidal suture?
The lambdoid suture is located at the back of the head. It forms the top border of the occipital bone and the rear border of the two parietal bones.
What are the parts of the occipital bone?
What attaches to the external occipital protuberance?
External occipital protuberance is a midline bony prominence in the occipital bone that ligamentum nuchae and trapezius muscle attach to its tip. The tentorium cerebelli attaches to its internal surface.
How many total bones does the occipital bone articulate with?
Where are the palatine bones?
The palatine bones contribute to the posterior part of the roof of the mouth and floor and lateral walls of the nose, the medial wall of the maxillary sinuses and the orbital floors. Each bone (Fig. 5-66) consists of horizontal and perpendicular plates (laminae) set at right angles to each other.
What structure articulates with the vertebral column?
Regions of the Vertebral Column In the neck, there are seven cervical vertebrae, each designated with the letter “C” followed by its number. Superiorly, the C1 vertebra articulates (forms a joint) with the occipital condyles of the skull.
Which of the following consist of a circle of bone and articulates superiorly with the occipital condyles?
What does the dens of the axis articulate with?
One of the most prominent features of the axis bone is a superior, tooth-like projection called the odontoid process (or dens). articulates with the anterior arch of the atlas bone, where they form a pivot joint.
What part of the axis articulates with the atlas?
Introduction. The Atlas (the first cervical vertebra ” C1) differs from the other cervical vertebrae in that it has no body or spinous process. It is comprised of two bony arches with two bony masses laterally. It articulates with the Occiput above and C2 (the Axis) below.
Where is the base of the occiput?
The part of the occipital bone in front of the foramen magnum is called the basilar part, often referred to as the base of the occiput. The two temporal bones converge on it from each side.
What connects occipital and temporal bones?
Occipitomastoid suture. Connects occipital and temporal bones.
Which cranial bone is unique in that it articulates with every other cranial bone?
Answer and Explanation: The cranial bone that is unique in that it articulates with every other cranial bone is the a. sphenoid bone. See full answer below.
What part of the brain is under the occipital bone?
The upper fossae are called the cerebral fossa and hold the occipital lobes of the cerebrum. The lower fossae are called the cerebellar fossae and hold the hemispheres of the cerebellum. The inferior edge of the squamous part of the inner occipital bone makes up the posterior part of the foramen magnum.
Where is the posterior fontanelle located?
The one in the rear portion of the head is called the posterior fontanelle. It is triangular in shape and closes within a couple of months after birth.
What suture joins the occipital and parietal bones?
The lambdoid suture joins the occipital bone to the right and left parietal and temporal bones.
Which suture joins the parietal and occipital bone and name meeting point of the suture?
The lambdoid suture (or lambdoidal suture) is a dense, fibrous connective tissue joint on the posterior aspect of the skull that connects the parietal bones with the occipital bone.
What muscles attach to occiput?
The suboccipital muscles are a group of muscles defined by their location to the occiput. Suboccipital muscles are located below the occipital bone. These are four paired muscles on the underside of the occipital bone; the two straight muscles (rectus) and the two oblique muscles (obliquus).
What is the function of the occipital protuberance?
The internal occipital protuberance separates these cavities dorsally and provides attachment for the tentorium cerebelli, the tent-shaped extension of the dura mater that forms a partition between the cerebrum and cerebellum.
What does external occipital protuberance mean?
a : a prominence on the outer surface of the occipital bone midway between the upper border and the foramen magnum that with the external occipital crest gives attachment to the ligamentum nuchae. ” called also external occipital protuberance, inion.
Where the occipital bone articulates with the first cervical vertebra?
The occipital condyles are where the occipital bone articulates with the first cervical vertebra.
What is the opening at the rear of the skull?
…a large oval opening, the foramen magnum, through which the medulla oblongata passes, linking the spinal cord and brain. The occipital adjoins five of the other seven bones forming the cranium: at the back of the head, the two parietal bones; at the side, the temporal bones; and in front,…
Does the occipital bone contains the foramen magnum?
The foramen magnum is the largest foramen of the skull. It is located in the most inferior portion of the cranial fossa as a part of the occipital bone.
What does Palatine process articulate with?
It participates in building the three cavities within the skull; the oral cavity, nasal cavity and the orbits. It does so by articulating with five bones; maxilla, sphenoid, ethmoid, inferior nasal concha, and vomer.
Is the palatine bone part of the orbit?
The floor of the orbit consists of three bones: the maxillary bone, the palatine bone, and the orbital plate of the zygomatic bone. This part of the orbit is also the roof of the maxillary sinus.
Which are parts of the pterygoid process of the sphenoid bone?
The pterygoid processes are extensions of the basal surface of the sphenoid body. Each process consists of a medial pterygoid plate and a lateral pterygoid plate. The lateral plate is wider and shorter than the medial and serves as the origin of the medial and lateral pterygoid muscles.
Where do vertebrae articulate with each other?
Each vertebra has a facet on each side of the vertebral body, which articulates with the head of a rib. There is also a facet on each of the transverse processes which articulates with the tubercle of a rib.
Which vertebrae do the ribs articulate with?
The ribs articulate posteriorly with the T1″T12 thoracic vertebrae, and most attach anteriorly via their costal cartilages to the sternum. There are 12 pairs of ribs.
What bone does not articulate directly with any other bone?
Famously, the hyoid bone is the only bone in humans that does not articulate with any other bone, but only has muscular, ligamentous, and cartilaginous attachments.
Which bone articulates with hip bones of the pelvis?
The acetabulum is the cup-shaped socket on the lateral aspect of the pelvis, which articulates with the head of the femur to form the hip joint.
Which bone articulates with most of the Carpals?
The scaphoid bone crosses both rows as it is the largest carpal bone. The scaphoid and the lunate are the two bones which actually articulate with the radius and ulna to form the wrist joint.
Which region of the hip bone articulates with the sacrum quizlet?
Which region of the hip bone articulates with the sacrum? Ilium. The ilium is the largest region of this bone. It articulates with the sacrum at the articular surface.
Are dens posterior?
Type II Dens fractures There is posterior displacement of the superior dens fragment and C-1 with respect to the base of the C-2 vertebral body.
Is the dens anterior or posterior?
Clinically Relevant Anatomy The odontoid process lies anterior to the spinal cord and is used as the pivot for the rotation of the head.
Which bone articulates with the dens C2?
The axis (C2 vertebra) has the upward projecting dens, which articulates with the anterior arch of the atlas.
What articulates with the occipital condyles?
Context: The occipital condyles of the skull articulate with the superior articular facets of the atlas vertebra and form an important junction between the cranium and the vertebral column.
What bone articulates with atlas?
Clinically Relevant Spinal Anatomy The first cervical vertebra, or atlas, articulates with the occiput rostrally and the axis caudally. It consists of two articulating lateral masses that are connected anteriorly and posteriorly by neural arches (Fig. 2-3).
Does the axis articulate with the skull?
Introduction to the Atlas bone anatomy: On the superior surface of the atlas bone are a pair of concave facets. The facets articulate with rounded condyles on the underside of the skull’s occipital bone. This junction allows the head to nod up and down. Directly below the atlas bone is the axis bone (C2).
What are the parts of the occipital bone?
squamous part: external/internal surfaces.basilar part (basiocciput): lower/upper surfaces.lateral (jugular) parts (two): under/upper surfaces.
What are the openings of the occipital bone?
At the base of your skull there is a large oval opening in the occipital bone that is called the foramen magnum. This opening allows for passage of the spinal cord. The occipital bone is the only cranial bone to connect to the cervical spine.
Is the clivus part of the occipital bone?
The clivus is located in the midline area of the skull base. It is part of the cranium, formed by the basilar part of the occipital bone and the corpus ossis sphenoidalis.