What is a sulcus in anatomy?
a groove or furrow; used in anatomic nomenclature to designate a linear depression, especially one of the cerebral sulci. basilar sulcus a groove in the midline of the anterior surface of the pons, lodging the basilar artery.
What is the difference between a sulcus and a notch?
The scapular notch, which forms a deep, distinctive depression along the superolateral border of the scapula , is one example. A sulcus is a furrow or fissure usually specific to the surface of the brain, but also in bones and other organs. When referring to bones, sulci are very often referred to as grooves.
What is the meaning of Sulci?
sul·cus | \ˈsəl-kəs \. plural sulci\ ˈsəl-ˌkī , -ˌkē, -ˌsī \. : furrow, groove especially : a shallow furrow on the surface of the brain separating adjacent convolutions.
What is the calcarine sulcus?
arterial sulci grooves on the internal surfaces of the cranial bones for the meningeal arteries. calcarine sulcus a sulcus of the medial surface of the occipital lobe, separating the cuneus from the lingual gyrus.
Where is the sulcus bone located?
Notch and sulcus The scapular notch, which forms a deep, distinctive depression along the superolateral border of the scapula, is one example. A sulcus is a furrow or fissure usually specific to the surface of the brain, but also in bones and other organs.
What is the difference between a fissure and a sulcus?
The terms fissure and sulcus as they are classically de- fined are: a fissure separates one lobe from another, while a sulcus is within a lobe and delimits gyri. The fissures and sulci of the cerebral hemispheres can be arranged into three groups according to their location.
What is groove in human anatomy?
Groove - A furrow in the bone surface that runs along the length of a vessel or nerve, providing space to avoid compression by adjacent muscle or external forces. Examples include a radial groove and the groove for the transverse sinus.
Where is the sagittal fissure?
The sagittal sulcus is a midline groove that runs across the internal surfaces of part of the squamous part of the frontal bone, the parietal bones, and part of the occipital bones....Sagittal sulcusTA2441Anatomical terms of bone5 more rows
What is the function of the sulci?
Brain gyri and sulci serve two very important functions: They increase the surface area of the cerebral cortex and they form brain divisions. Increasing the surface area of the brain allows more neurons to be packed into the cortex so that it can process more information.
What is the difference between a gyri and a sulci?
Gyrus, or its plural term gyri, is the term used for the prominent raise or outward fold in the brain. Picture the raised ridges in your mind. These raised ridges are what you call as gyri. On the other hand, sulcus, or sulci in plural, is the depression or the inward fold seen in the brain.
What is called groove?
A groove is a deep line cut into a surface. Their wheels left grooves in the ground. 2. countable noun [usually supplement NOUN] In popular music, a groove is a rhythm.
What is interventricular sulcus?
The interventricular sulcus is a superficial groove or depression between the ventricles. It is of importance because this is where some of the large coronary arteries and veins run. Those vessels carry blood to and from the walls of the heart.
What is the full meaning of groove?
a long narrow channelDefinition of groove (Entry 1 of 2) 1 : a long narrow channel or depression. 2a : a fixed routine : rut. b : a situation suited to one's abilities or interests : niche.
What happens if the central sulcus is damaged?
The cingulate gyrus has a role in the processing of emotions and the regulation of behavior. As a result, damage to this area can result in emotional and behavioral disorders. This region is also involved in regulating autonomic motor function.
What is a fissure in anatomy?
Medical Definition of fissure 1 : a natural cleft between body parts or in the substance of an organ: as. a : any of several clefts separating the lobes of the liver. b : any of various clefts between bones or parts of bones in the skull.
What is central sulcus?
The central sulcus (the sulcus of Rolando) forms the boundary between the frontal and the parietal lobes on the lateral and medial surfaces of the cerebral hemispheres (Figs. 10 and 11).
Are sulcus and fissure interchangeable?
Sulcus and fissure are two grooves present on the brain surface. A sulcus is a less deep groove that provides a convoluted nature while fissure is a long narrow split that separates larger portions of the brain into lobes. Therefore, we can consider this as the key difference between sulcus and fissure.
What are fissures?
Overview. An anal fissure is a small tear in the thin, moist tissue (mucosa) that lines the anus. An anal fissure may occur when you pass hard or large stools during a bowel movement. Anal fissures typically cause pain and bleeding with bowel movements.
What are the major fissures and sulci?
The main fissures and sulci divide each of the hemispheres into four lobes – temporal, occipital, parietal and frontal lobes. Sulcus and fissures mainly differ in the fact that sulcus produces gyri on the cerebral cortex, while fissures divide the brain into lobes.
What are the fissures of the brain?
A fissure is a deeper grove and is often used interchangeably with sulcus. The cerebrum is divided into a left and right hemisphere by a longitudinal fissure that goes by many different names: longitudinal fissure, cerebral fissure, median longitudinal fissure, interhemispheric fissure.
What is a sulcus in biology?
Rotating image of human brain, illustrating the lateral sulcus in the brain. In biological morphology and anatomy, a sulcus (pl. sulci) is a furrow or fissure. It may be a groove in the surface of a limb or an organ, ...
Where are sulcus located?
In invertebrate zoology, a sulcus is a fold, groove, or boundary, especially at the edges of sclerites or between segments .
What is the sulcus of Cercis?
Rotating image of human brain, illustrating the lateral sulcus in the brain. In biological morphology and anatomy, a sulcus (pl. sulci) is a furrow or fissure.
What are the different types of sulcus?
anterior interventricular sulcus. calcaneal sulcus. coronal sulcus. femoral sulcus or intercondylar fossa of femur. gingival sulcus. gluteal sulcus. interlabial sulci. intermammary sulcus. intertubercular sulcus, the groove between the lesser and greater tubercules of the humerus (bone of the upper arm)
What is the meaning of sulcus?
Definition of sulcus. : furrow, groove especially : a shallow furrow on the surface of the brain separating adjacent convolutions.
What is Lucy's brain called?
2021 According to the findings in the paper, Lucy’s brain looked like an ape’s brain but seemingly exhibited a structure called a lunate sulcus.
What is a fissure in bone?
Fissures are open slits, grooves or depressions in a bone, often housing nerves and blood vessels. An example is the inferior orbital fissure. Separating the floor from the lateral wall, it gives passage to structures like the zygomatic nerve and orbital branches of the pterygopalatine ganglion .
What is the area of bone that project above the bone surface called?
Projections and parts. Areas of bone that project above the bone surface can be globally referred to as projections. They are attachment points for tendons and ligaments, with their shape and size being indicative of the force exerted through the attachment to the bone.
What are the parts of a long bone?
Long bones are composed of four distinct parts: a head (epiphysis), a neck (metaphysis), a body (diaphysis), and an articular surface. The head, or epiphysis (epi- meaning "upon") of a bone refers to the rounded portion found at either ends of the bone. The neck, or metaphysis (meta- meaning "after", or "subsequent to") is the widest part ...
How to avoid confusion in bone?
Simply remember that the dia physis extends throughout the central length of the bone, with the meta physis following after, leading to the epi physis upon either end.
Why are bone markings important?
Their importance comes when we try to describe the shape of the bone or to understand how the muscles , ligaments and other structures affect this bone and vice versa.
What is the lateral condyle?
They often provide structural support to the articular surface, helping to absorb the force exerted at the joint. The lateral condyle of the femur is one example, which is easily palpable at the knee .
What is temporal fossa?
The temporal fossa is one example. It is one of the largest landmarks on the skull, serving as an origin site for the temporal muscle . Fovea refers to a pit or depression - similar to a fossa, but generally much smaller. An example is the fovea capitis, found in the center of the head of the femur.
How deep is a sulcus?
A sulcus between 1 and 3 millimeters (mm) deep is considered standard in most people. But any depth of more than 3 to 4 mm may be a sign of gum disease.
What happens if you leave plaque in your sulcus?
If it goes untreated, it can then become a more serious condition called periodontitis. Food and plaque getting trapped in the sulcus can cause these conditions.
How to measure gingival sulcus depth?
To measure the gingival sulcus depth, the dentist will use a small ruler to gently probe your gums to check for inflammation and measure the sulcus around each tooth. To do this, they will place the ruler just under the gum tissue.
What is the little ridge in your mouth where your teeth meet your gums?
The gingival sulcus ( or gingival crevice) is that little ridge in your mouth where your teeth meet your gums.
What is the purpose of measuring the depth of the gingival sulcus?
Measuring the depth of the gingival sulcus helps dental practitioners diagnose gum disease and evaluate treatment options.
Why is the space between the sulcus and the tooth bigger?
When it’s unhealthy or diseased, the space between the sulcus and the tooth is a little larger. This allows substances to enter that space more easily.
Where is the cementoenamel junction?
At the bottom of the sulcus is the cementoenamel junction. This area helps the gums stay attached to the surface of your teeth.
