|
Allergic Shiner
An allergic shiner is a dark discoloration below the eye that is associated with allergic rhinitis and often seen in conjunction with bilateral Dennie–Morgan folds. These shiners are caused by venous congestion within the infraorbital groove, particularly from the nose. The characteristic infraorbital discoloration related to allergic shiners is due to a backup in the venous network supplying the mucous membranes of the paranasal and nasal cavities draining primarily via the branches of the sphenopalatine veins passing backward to the pterygoid plexus. While a classic finding in pediatric patients with allergic rhinitis Allergic rhinitis, of which the seasonal type is called hay fever, is a type of inflammation in the nose that occurs when the immune system overreacts to allergens in the air. Signs and symptoms include a runny or stuffy nose, sneezing, red, i ..., these particular shiners will persist into adulthood if their allergies are not successfully addressed. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allergic Rhinitis
Allergic rhinitis, of which the seasonal type is called hay fever, is a type of inflammation in the nose that occurs when the immune system overreacts to allergens in the air. Signs and symptoms include a runny or stuffy nose, sneezing, red, itchy, and watery eyes, and swelling around the eyes. The fluid from the nose is usually clear. Symptom onset is often within minutes following allergen exposure, and can affect sleep and the ability to work or study. Some people may develop symptoms only during specific times of the year, often as a result of pollen exposure. Many people with allergic rhinitis also have asthma, allergic conjunctivitis, or atopic dermatitis. Allergic rhinitis is typically triggered by environmental allergens such as pollen, pet hair, dust, or mold. Inherited genetics and environmental exposures contribute to the development of allergies. Growing up on a farm and having multiple siblings decreases this risk. The underlying mechanism involves IgE antibodies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dennie–Morgan Fold
A Dennie–Morgan fold, also known as a Dennie–Morgan line or an infraorbital fold, is a fold or line in the skin below the lower eyelid. It can simply be an ethnic/genetic trait, but was found in one study to occur in 25% of patients with atopic dermatitis. The presence of Dennie–Morgan folds can be used as a diagnostic marker for allergy, with a sensitivity of 78% and specificity of 76% for atopic dermatitis according to one study, although another study found them to be of diagnostic significance in atopic dermatitis. Such folds are also common among certain ethnic groups such as Africans, Tatars, Slavs, Balts and Finnic peoples, and are not known to be associated with any medical condition in these. The pathophysiology of this sign is not clear. One proposed mechanism is that continuous spasm of the superior tarsal muscle The superior tarsal muscle is a smooth muscle adjoining the levator palpebrae superioris muscle that helps to raise the upper eyelid. Structure T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Venous Congestion
Venostasis, or venous stasis, is a condition of slow blood flow in the veins, usually of the legs. Presentation Complications Potential complications of venous stasis are: * Venous ulcers * Blood clot formation in veins (venous thrombosis), that can occur in the deep veins of the legs (deep vein thrombosis, DVT) or in the superficial veins Causes Causes of venous stasis include: * Obesity * Pregnancy * Previous damage to leg * Blood clot * Smoking * Swelling and inflammation of a vein close to the skin * Congestive heart failure. * Long periods of immobility that can be encountered from driving, flying, bed rest/hospitalization, or having an orthopedic cast. Recommendations by clinicians to reduce venous stasis and DVT/PE often encourage increasing walking, calf exercises, and intermittent pneumatic compression when possible. Diagnosis See also * Virchow's triad Virchow's triad or the triad of Virchow () describes the three broad categories of factors that are thought to con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Infraorbital Groove
The infraorbital groove (or sulcus) is located in the middle of the posterior part of the orbital surface of the maxilla. Its function is to act as the passage of the infraorbital artery, the infraorbital vein, and the infraorbital nerve. Structure The infraorbital groove begins at the middle of the posterior border of the maxilla (with which it is continuous). This is near the upper edge of the infratemporal surface of the maxilla. It passes forward, and ends in a canal which subdivides into two branches. The infraorbital groove has an average length of 16.7 mm, with a small amount of variation between people. It is similar in men and women. Function The infraorbital groove creates space that allows for passage of the infraorbital artery, the infraorbital vein, and the infraorbital nerve. Clinical significance The infraorbital groove is an important surgical landmark for local anaesthesia of the infraorbital nerve. See also * Infraorbital foramen In human anatomy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nose
A nose is a protuberance in vertebrates that houses the nostrils, or nares, which receive and expel air for respiration alongside the mouth. Behind the nose are the olfactory mucosa and the sinuses. Behind the nasal cavity, air next passes through the pharynx, shared with the digestive system, and then into the rest of the respiratory system. In humans, the nose is located centrally on the face and serves as an alternative respiratory passage especially during suckling for infants. The protruding nose that completely separate from the mouth part is a characteristic found only in therian mammals. It has been theorized that this unique mammalian nose evolved from the anterior part of the upper jaw of the reptilian-like ancestors ( synapsids). Air treatment Acting as the first interface between the external environment and an animal's delicate internal lungs, a nose conditions incoming air, both as a function of thermal regulation and filtration during respiration, as well as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbit (anatomy)
In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated. "Orbit" can refer to the bony socket, or it can also be used to imply the contents. In the adult human, the volume of the orbit is , of which the eye occupies . The orbital contents comprise the eye, the orbital and retrobulbar fascia, extraocular muscles, cranial nerves II, III, IV, V, and VI, blood vessels, fat, the lacrimal gland with its sac and duct, the eyelids, medial and lateral palpebral ligaments, cheek ligaments, the suspensory ligament, septum, ciliary ganglion and short ciliary nerves. Structure The orbits are conical or four-sided pyramidal cavities, which open into the midline of the face and point back into the head. Each consists of a base, an apex and four walls."eye, human."Encyclopædia Britannica from Encyclopædia Britannica 2006 Ultimate Reference Suite DVD 2009 Openings There are two important foramina, or windows, two important fissu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphenopalatine , a foramen in the skull that connects the nasal cavity with the pterygopalatine fossa
{{disambiguation ...
Sphenopalatine may refer to: * sphenopalatine artery, an artery of the head, commonly known as the artery of epistaxis * sphenopalatine ganglion (or "pterygopalatine ganglion") * sphenopalatine nerves * sphenopalatine foramen The sphenopalatine foramen is a foramen in the skull that connects the nasal cavity with the pterygopalatine fossa. Structure The processes of the superior border of the palatine bone are separated by the ''sphenopalatine notch'', which is convert ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterygoid Plexus
The pterygoid plexus (; in Merriam-Webster Online Dictionary '. from ''pteryx'', "wing" and ''eidos'', "shape") is a of considerable size, and is situated between the and |
