Occipital anatomy. Occipital lobe 2019-01-16

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Occipital Bone

occipital anatomy

Surgery may become necessary if there is significant compression of the , , the lower or cervical arteries. Transverse grooves, one on either side, extend from the internal occipital protuberance to the lateral angles of the bone; those grooves accommodate the transverse sinuses, and their prominent margins give attachment to the tentorium cerebelli. Bacteria and viruses are the main culprits of throat infections, which includes the likes of strep throat, diphtheria, and whooping cough. They are linked by lymphatic vessels as part of the circulatory system. —The occipital, like the other cranial the outer and inner tables, between which is the cancellous tissue or diploë; the bone is especially thick at the ridges, protuberances, condyles, and anterior part of the basilar part; in the inferior fossæ it is thin, semitransparent, and destitute of diploë. This groove lodges the terminal part of the transverse sinus, and opening into it, close to its medial margin, is the orifice of the condyloid canal. This faint ridge, leading out toward the mastoid process, is the superior nuchal line, below it is the inferior nuchal line.

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Occipital Bone

occipital anatomy

We use the information we collect through the use of cookies for our business purposes, including operation of the site, as well as to conduct research and product analyses to help us better develop and market our products. —The superior borders extend from the superior to the lateral angles: they are deeply serrated for articulation with the occipital borders of the parietals, and form by this union the lambdoidal suture. The prevalence of occipital condyle fractures is not definitely known. Currently, sarcoidosis has no cure. The occipital bone extends all the way from here at the back, to here underneath. We use the data we obtain through the use of cookies to customize your site experience by anticipating the information and services that may be interesting to you.

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Occipital Bone Anatomy, Diagram & Function

occipital anatomy

Related: Devon Andre has been involved in the health and dietary supplement industry for a number of years. It is separated from the and on the medial surface by the and on the lateral side by the , an imaginary line extending from the to the parieto-occipital sulcus. Throat infections A common cause of sore throats, difficulty swallowing, and a lot of irritation and discomfort. Transplant graft rejections A transplant is the procedure of transferring cells, tissues, or organs from one site to another. Obliquus Capitis Inferior As its name suggests, the obliquus capitis inferior is the most inferiorly positioned of the suboccipital muscles. They collectively act to extend and rotate the head. Unsourced material may be challenged and.

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What Causes Swollen Occipital Lymph Nodes? Anatomy, Diagnosis and Treatment

occipital anatomy

It contains the vertebral artery can be identified during surgery , suboccipital venous plexus and suboccipital nerve. —The lateral parts are situated at the sides of the foramen magnum; on their under surfaces are the condyles for articulation with the superior facets of the atlas. The lateral borders of this surface also contain tiny indentations for the inferior petrosal sinus. The occipital lymph nodes, as well as all lymph nodes found in the body, filter out impurities and harmful substances from the body. It is commonly done with organs like the liver, skin, or even the entire heart. Genetic lipid storage disease A disorder characterized by excess fatty lipid substances in the blood stream.

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Occipital bone

occipital anatomy

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 occipital articulates with six bones: the two parietals, the two temporals, the sphenoid, and the atlas. We'll look at these joints in a minute. The internal surface is deeply concave and divided into four fossæ by a cruciate eminence. Like the other cranial bones, it is classed as a. It is trapezoidal in shape and curved on itself like a shallow dish.

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Occipital Bone Anatomy, Diagram & Function

occipital anatomy

After that we'll look at the muscles that maintain the position of the head and cause it to move. When present the lateral surface is divided into three roughly parallel gyri superior, middle and inferior occipital gyri by two transverse occipital sulci referred to as superior and inferior when both are present 1. We'll start by looking at the bones that are involved, then we'll look at the joints and ligaments that connect them. Swollen occipital lymph nodes can also be painful as swelling starts to compress nearby nerves in the area. It transmits the medulla oblongata and its membranes, the accessory nerves, the vertebral arteries, the anterior and posterior spinal arteries, and the membrana tectoria and alar ligaments. The skull consists of the cranium and the facial skeleton. The bones that are involved in support and movement of the head are the thoracic and cervical vertebrae, the upper ribs, the clavicles, and this part of the underside of the skull, that's called the occiput.

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Occipital bone

occipital anatomy

The number of nuclei for the occipital plane is usually given as four, two appearing near the middle line about the second month, and two some little distance from the middle line about the third month of. Transverse sinus ridges extend horizontally and rightwards from the protuberance and run into the sigmoid sinus grooves. The occipital bone is placed on the spinal column and creates a joint which helps the head move. However, if they remain for an extended duration and are accompanied by another symptom such as fatigue and weight loss, there may be a serious underlying condition you should have assessed right away. Morphological patterns of the collateral sulcus in the human brain. They work in the same fashion as other lymph nodes found elsewhere around the body, helping to fight infection. —On its lower surface, about 1 cm.

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Suboccipital Muscles

occipital anatomy

The anterior atlanto-occipital membrane joins just in front of the opening, while the rectus capitis anterior and longus capitis insert on each side of the middle line. In the upper part of the internal occipital crest, a small depression is sometimes distinguishable; it is termed the vermian fossa since it is occupied by part of the vermis of the cerebellum. Looking for the lunate sulcus: a magnetic resonance imaging study in modern humans. We subscribe to third-party societies services such as Google Analytics, Google+, Youtube, Vimeo, Facebook, Linkedin, Twitter and New Relic to further analyze the information collected with cookie technology and to help us improve the functioning of the site by monitoring traffic in popular areas and to modify the services and information we provide to meet customer demand. The curved, expanded plate behind the foramen magnum is named the squama; the thick, somewhat quadrilateral piece in front of the foramen is called the basilar part, whilst on either side of the foramen is the lateral portion. Inner surface of occipital bone The inner surface of the occipital bone forms the base of the.

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Occipital lobe

occipital anatomy

The parietal bones at the top of the head and the occipital bone will fuse together later, between the ages of 26 and 40. The inferior nuchal line runs across the midpoint of the medial nuchal line. He embraces an active lifestyle combining diet, exercise and healthy choices. Rectus Capitis Posterior Major The rectus capitis posterior major is the larger of the rectus capitis muscles. Sarcoidosis A condition characterized by tiny collections of inflammatory cells called granulomas. The condyles are oval or reniform kidney-shaped in shape, and their anterior extremities, directed forward and medialward, are closer together than their posterior, and encroach on the basilar portion of the bone; the posterior extremities extend back to the level of the middle of the foramen magnum. It is pierced by a large oval aperture, the foramen magnum, through which the cranial cavity communicates with the vertebral canal.

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