Calcarine sulcus
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  Calcarine sulcus



Calcarine sulcus

    Location of V1 in the human occipital lobe. The central visual field is represented in hte psoterior calcarine sulcus. The peripheral visual field is represented in the anterior portion of the calcarine sulus.

RELATED TERMS
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Lobe
1. The fleshy lower part of the ear. 2. A well-defined portion of an organ.

Central
In anatomy and medicine (as elsewhere), central is the opposite of "peripheral" which means away from the center.

Peripheral
At or near the surface of the body. Located away from the center structure.

Anterior
The front, as opposed to the posterior. The anterior surface of the heart is toward the breast bone (the sternum).



SIMILAR TERMS
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Calcaneal spur
A bony spur projecting from the back or underside of the heel bone (the calcaneus) that often makes walking painful. A calcaneal spur is also called a heel spur.

Calcaneocuboid joint
The calcaneocuboid joint is located in the foot between the calcaneus bone (the heel bone) and the cuboid bone (a bone shaped like a cube just in front of the calcaneus).

Calcaneus
The calcaneus is the heel bone. It is also called the os calcis. The calcaneus is a more or less rectangular bone at the back of the foot.

Calcibind
Calcibind is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): cellulose sodium phosphate.

Calciferol
Vitamin D.

Calcific bursitis
A bursa is a thin fluid-filled sac that reduces friction forces between tissues of the body. Chronic (repeated of long-standing) inflammation of the bursa (bursitis) can lead to calcification of the bursa. This is referred to as "calcific bursitis." The calcium deposition (calcification) can occur as long as the inflammation is present.

Calcification
Formation of calcific (chalky) material in tissue.

Calcification, nonarteriosclerotic cerebral
Is a genetic neurological disorder characterized by abnormal deposits of calcium in certain of areas of the brain (including the basal ganglia and the cerebral cortex). Symptoms may include motor function deterioration, dementia, mental retardation, spastic paralysis, dysarthria (poorly articulated speech), spasticity (stiffness of the limbs), ocular (eye) problems, and athetosis (involuntary, writhing movements).

Calcified granuloma
A calcified granuloma is a granuloma containing calcium deposits. Since it usually takes some time for calcium to be deposited in a granuloma, it is generally assumed that a calcified granuloma is an old granuloma.

Calcijex
Calcijex is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): calcitriol.

Calcimar
Calcimar is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): calcitonin, salmon.

Calcimimetic
A drug in a class of orally active, small molecules that decrease the secretion of parathyroid hormone (PTH) by activating calcium receptors. The secretion of PTH is normally regulated by the calcium-sensing receptor. Calcimimetic agents increase the sensitivity of this receptor to calcium, which inhibits the release of parathyroid hormone and lowers parathyroid hormone levels within a few hours.

Calcinosis
An abnormal deposit of calcium salts in body tissues, as is seen in some forms of disease.

Calciparine
Calciparine is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): heparin calcium.

Calcipotriene
A synthetic form of vitamin D3 that can be applied to the skin to treat psoriasis.

Calcitonin
A hormone secreted by the thyroid gland which controls the levels of calcium and phosphorous in the blood.

Calcitonin-salmon
Calcitonin-salmon is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): calcitonin, salmon.

Calcitriol
The active form of vitamin D. Calcitriol is formed in the kidneys or made in the laboratory. It is used as a drug to increase calcium levels in the body in order to treat skeletal and tissue-related calcium deficiencies caused by kidney or thyroid disorders.

Calcium
Chemical element needed for healthy teeth, bones and nerves

Calcium channel blocker
Or calcium blocker. A medication that lowers blood pressure.

Calcium Channel Blocker
A drug used to lower blood pressure.

Calcium chloride 10 per cent in plastic container
Calcium chloride 10 per cent in plastic container is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): calcium chloride.

Calcium deficiency
A low level of calcium in the blood (hypocalcemia) which can make the nervous system highly irritable causing tetany (spasms of the hands and feet, muscle cramps, abdominal cramps, and overly active reflexes). Chronic calcium deficiency contributes to poor mineralization of bones, soft bones (osteomalacia) and osteoporosis and, in children, rickets and impaired growth.

Calcium disodium versenate
Calcium disodium versenate is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): edetate calcium disodium.

Calcium excess
Overly high intake of calcium that can result in elevated levels of calcium in the blood (hypercalcemia). This can cause muscle weakness and constipation, affect the conduction of electrical impulses in the heart (heart block), lead to calcium stones in the urinary tract (nephrocalcinosis), impair kidney function, and interfere with the absorption of iron, predisposing to iron deficiency.

Calcium gluceptate
Calcium gluceptate is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): calcium gluceptate.

Calcium-Channel Blocker
A drug that reduces spasm of the blood vessels, lowers blood pressure, and controls angina; acts by selectively blocking the uptake of calcium by the cells.

Calculi
Stones or solid lumps such as gallstones.

Calculi, renal
Kidney stones, by another name. A common cause of blood in the urine and pain in the abdomen, flank, or groin. Occurs in 1 in 20 people at some time in their life. Development of the stones is related to decreased urine volume or increased excretion of stone-forming components such as calcium, oxalate, urate, cystine, xanthine, and phosphate. The stones form in the urine collecting area (the pelvis) of the kidney and may range in size from tiny to staghorn stones the size of the renal pelvis itself . The pain is usually of sudden onset, very severe and colicky (intermittent), not improved by changes in position, radiating from the back, down the flank, and into the groin. Nausea and vomiting are common. Predisposing factors may include recent reduction in fluid intake, increased exercise with dehydration, medications that cause hyperuricemia (high uric acid) and a history of gout. Treatment includes relief of pain, hydration and, if there is concurrent urinary infection, antibiotics. The majority of stones pass spontaneously within 48 hours. However, some stones may not. There are several factors which influence the ability to pass a stone. These include the size of the person, prior stone passage, prostate enlargement, pregnancy, and the size of the stone. A 4 mm stone has an 80% chance of passage while a 5 mm stone has a 20% chance. If a stone does not pass, urologic intervention may be needed. The process of stone formation is also called nephrolithiasis or urolithiasis.

Calculus
Hard residue, commonly known as "tarter," that forms on teeth due to inadequate plaque control, often stained yellow or brown.

Calculus, renal
A stone in the kidney (or lower down in the urinary tract). Also called a kidney stone. The stones themselves are called renal caluli.

Calcutta doctors
All doctors near Calcutta, India. Doctors who can assist a patient in Calcutta.



PREVIOUS AND NEXT TERMS
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Crowning
The appearance of a baby's head at the vaginal opening during labor.

Cryotherapy
Technique using liquid nitrogen, for example, to freeze warts and precancerous lesions.

Custodial parent
The parent who has legal custody (charge and control) of a child.

Cytomegalovirus infection
A common viral infection transmitted by saliva, breast milk, or urine.Relatively rare and relatively mild, the infection does occasionally causedeafness and neurological problems in newborns.

Cafe Wall illusion
Although the lines composing the image are parallel, they do not appear to be.

Calcarine sulcus

Canonical viewpoint
A particular viewpoint of an object that people are more likely to imagine, quicker to name and more likely to classify as the best view of an object. Suggests that object representation may not be viewpoint independent.

Center-Surround
A type of spatial receptive field structure in which the central region of the receptive field and the Surround portion influence cell activities in different ways e.g. ON-center, OFF-Surround

Chromatic adaptation technique
Used to identify receptor inputs. An adapting light is chosen such that it affects the response to one of the inputs to a cell far more than the other. The cells response is selectively desensitized so that the cell is largely driven by the other input. This way the response properties of the cell can now be studied in relative isolation.

Chromostereopsis
The optics of the eye are such that short wavelengths are refracted slightly more than long wavelengths creating a positional disparity on the retina. When viewed by two eyes a stereoscopic disparity is obtained. This is termed Chromostereopsis or Chromatic Stereopsis

Closed-Loop control
A control system in which the output is continuously modified by feedback from the environment.

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