sinus

sinus /si·nus/ (si´nus) pl. si´nus, sinuses   [L.]

1. a recess, cavity, or channel, as (a) one in bone or (b) a dilated channel for venous blood.

2. an abnormal channel or fistula permitting escape of pus.si´nusal

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air sinus  an air-containing space within a bone.

anal sinuses  furrows, with pouchlike openings at the distal end, separating the rectal columns.

aortic sinus  a dilatation between the aortic wall and each of the semilunar cusps of the aortic valve; from two of these sinuses the coronary arteries originate.

branchial sinus  an abnormal cavity or space opening externally on the inferior third of the neck; usually a result of persistence of the second pharyngeal groove and cervical sinus.

carotid sinus  a dilatation of the proximal portion of the internal carotid or distal portion of the common carotid artery, containing in its wall pressoreceptors which are stimulated by changes in blood pressure.

Carotid sinus (sinus caroticus) and carotid arteries in a deep dissection of the right side of the neck.

cavernous sinus  either of two irregularly shaped sinuses of the dura mater, located at either side of the body of the sphenoid bone and communicating across the midline; it contains the internal carotid artery and abducent nerve.

cervical sinus  a temporary depression caudal to the second pharyngeal arch, containing the succeeding pharyngeal arches; it is overgrown by the second pharyngeal arch and closes off as the cervical vesicle.

circular sinus  the venous channel encircling the hypophysis, formed by the two cavernous sinuses and the anterior and posterior intercavernous sinuses.

coccygeal sinus  a sinus or fistula just over or close to the tip of the coccyx.

coronary sinus  the terminal portion of the great cardiac vein, lying in the coronary sulcus between the left atrium and ventricle, and emptying into the right atrium.

cortical sinuses  lymph sinuses in the cortex of a lymph node, which arise from the marginal sinuses and continue into the medullary sinuses.

dermal sinus  a congenital sinus tract extending from the surface of the body, between the bodies of two adjacent lumbar vertebrae, to the spinal canal.

dural sinuses  large venous channels forming an anastomosing system between the layers of the dura mater, draining the cerebral veins and some diploic and meningeal veins into the veins of the neck.

sinus of epididymis  a long, slitlike serous pocket between the upper part of the testis and the overlying epididymis.

ethmoid sinuses , ethmoidal sinuses see under cell.

frontal sinus  one of the paired paranasal sinuses in the frontal bone, each communicating with the middle meatus of the ipsilateral nasal cavity.

intercavernous sinuses  two sinuses of the dura mater connecting the two cavernous sinuses, one passing anterior and the other posterior to the infundibulum of the hypophysis.

lacteal sinuses , lactiferous sinuses enlargements of the lactiferous ducts just before they open on the mammary papilla.

lymphatic sinuses  irregular, tortuous spaces within lymphoid tissue (nodes) through which lymph passes, to enter efferent lymphatic vessels.

marginal sinuses 

1. see under lake.

2. bowl-shaped lymph sinuses separating the capsule from the cortical parenchyma, and from which lymph flows into the cortical sinuses.

maxillary sinus  one of the paired paranasal sinuses in the body of the maxilla on either side, and opening into the middle meatus of the ipsilateral nasal cavity.

medullary sinuses  lymph sinuses in the medulla of a lymph node, which divide the lymphoid tissue into a number of medullary cords.

occipital sinus  one of the sinuses of the dura mater, passing upward along the midline of the cerebellum.

oral sinus  stomodeum.

paranasal sinuses  mucosa-lined air cavities in bones of the skull, communicating with the nasal cavity and including ethmoidal, frontal, maxillary, and sphenoidal sinuses.

Paranasal sinuses (sinus paranasales).

petrosal sinus  either of two sinuses of the dura mater, arising from the cavernous sinus and draining into the internal jugular vein (inferior petrosal s.) or into the transverse sinus (superior petrosal s.).

pilonidal sinus  a suppurating sinus containing hair, occurring chiefly in the coccygeal region.

prostatic sinus  the posterolateral recess between the seminal colliculus and the wall of the urethra.

sinus of pulmonary trunk  a slight dilatation between the wall of the pulmonary trunk and each of the semilunar cusps of the pulmonary trunk valve.

renal sinus  a recess in the substance of the kidney, occupied by the renal pelvis, calices, vessels, nerves, and fat.

sagittal sinus, inferior  a small venous sinus of the dura mater, opening into the straight sinus.

sagittal sinus, superior  a venous sinus of the dura mater which ends in the confluence of sinuses.

sigmoid sinus  a venous sinus of the dura mater on either side, continuous with the transverse sinus and draining into the internal jugular vein of the same side.

sphenoid sinus , sphenoidal sinus one of the paired paranasal sinuses in the body of the sphenoid bone and opening into the highest meatus of the ipsilateral nasal cavity.

sphenoparietal sinus  either of two sinuses of the dura mater, draining into the anterior part of the cavernous sinus.

sinus of spleen  a dilated venous sinus in the substance of the spleen.

straight sinus  one of the sinuses of the dura mater formed by junction of the great cerebral vein and inferior sagittal sinus, commonly ending in the confluence of the sinuses.

tarsal sinus  a space between the calcaneus and talus.

tentorial sinus  straight s.

terminal sinus  a vein that encircles the vascular area in the blastoderm.

transverse sinus 

1. either of two large sinuses of the dura mater.

2. a passage behind the aorta and pulmonary trunk and in front of the atria.

tympanic sinus  a deep recess in the posterior part of the tympanic cavity.

urogenital sinus  an elongated sac formed by division of the cloaca in the early embryo, forming most of the bladder, the female vestibule, urethra, and vagina, and most of the male urethra.

uterine sinuses  venous channels in the wall of the uterus in pregnancy.

sinus of venae cavae  the portion of the right atrium into which the inferior and the superior venae cavae open.

sinus veno´sus 

1. the common venous receptacle in the embryonic midheart, attached to the posterior wall of the primordial atrium.

2. venous s. (1).

3. s. of venae cavae.

venous sinus 

1. a large vein or channel for the circulation of venous blood.

2. s. venosus (1).

venous sinuses of dura mater  large channels for venous blood forming an anastomosing system between the layers of the dura mater of the brain, receiving blood from the brain and draining into the veins of the scalp or deep veins at the base of the skull.

venous sinus of sclera  a branching, circumferential vessel in the internal scleral sulcus, a major component of the drainage pathway for aqueous humor.

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si·nus (sns)

n.

1. A depression or cavity formed by a bending or curving.

2. A channel for the passage of blood or lymph, without the coats of an ordinary vessel, such as the blood passages in the gravid uterus or in the cerebral meninges.

3. Any of various air-filled cavities in the bones of the skull, especially one communicating with the nostrils.

4. A dilatation in a blood vessel.

5. A fistula or tract leading to a pus-filled cavity.

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Sinus

Air-filled cavities surrounding the eyes and nose are lined with mucus-producing membranes. They cleanse the nose, add resonance to the voice, and partially determine the structure of the face.

Mentioned in: Abscess, Erythromycins, Nasal Polyps, Sinusitis

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sinus

[sī′nəs]

Etymology: L, hollow

a cavity or channel, such as a cavity within a bone, a dilated channel for venous blood, or one permitting the escape of purulent material.

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sinus (sī´nus),

n a cavity, recess, or hollow space.

sinus, alveolar,

n a passage connecting a pathologic cavity in the alveolus with the oral or nasal cavity and penetrating the mucous membrane. See also fistula, alveolar.

sinus balloon,

n See balloon, sinus.

sinus, carotid,

n the swelling in the artery just before the common carotid artery bifurcates into the internal and external carotid arteries.

sinus, coronary,

n the venous sinus in the groove between the left cardiac auricle and the left ventricle.

sinus(es), ethmoidal

n an air space located within the ethmoid bone, which comprises the floor of the skull and the roof of the nose. There are four ethmoid sinuses: the anterior, middle, and two posterior sinuses. The anterior and middle sinuses drain directly into the middle meatus (opening) of the nose. The posterior sinuses drain into the superior meatus of the nose.

sinus(es), frontal,

n an air space located within the frontal bone of the forehead.

sinus(es), maxillary (antrum of Highmore, maxillary antrum),

n a large pyramidal cavity within the body of the maxilla. Its walls are thin and correspond to the orbital, nasal anterior, and infratemporal surfaces of the body of the maxilla. On dental radiographs the floor of the sinus is often observed approximating the root apices of the teeth and is seen to extend from the canine or premolar region posteriorly to the molar or tuberosity region.

sinus(es), paranasal,

n the paired air cavities in various bones around the nose, including the maxillary sinus within the maxilla, the sphenoid sinus in the sphenoid bone, the ethmoid sinuses in the ethmoid bone, and the frontal sinus in the frontal bone.

sinus(es), sphenoid

n an air space located within the wing-like sphenoid bone, located at the base of the skull. These sinuses are variable in shape and size, and are rarely symmetrical because of lateral displacement of the septum.

sinus tract,

n See tract, sinus.

sinus pneumatization

n an enlargement of the maxillary sinus, usually as part of the aging process and as a result of the loss of maxillary teeth.

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sinus

1. a recess, cavity, or channel, as (a) one in bone or (b) a dilated, valveless channel for venous blood.

2. an abnormal channel or fistula, permitting escape of pus. In common, unqualified usage, the word sinus refers to any of the cavities in the skull that are connected with the nasal cavity—the paranasal sinuses.

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anal s's

furrows, with pouchlike recesses at their distal ends, separating the rectal columns; called also anal crypts.

basilar sinus

a dural venous sinus which runs on the floor of the cranial cavity and out through the foramen magnum.

cavernous sinus

an irregularly shaped venous channel between the layers of dura mater of the brain, one on either side of the body of the sphenoid bone and communicating across the midline. Several cranial nerves and, when present, the rete mirabile, course through this sinus.

cavernous sinus syndrome

lesions of the cavernous syndrome, caused by neoplasia or infectious agents, result in a dilated pupil and paralysis of the globe; vision is usually spared.

cerebral sinus

one of the ventricles of the brain.

cervical sinus

a temporary depression in the neck of the embryo containing the branchial arches.

circular sinus

the venous channel encircling the pituitary gland, formed by the two cavernous sinuses and the anterior and posterior intercavernous sinuses.

conchal sinus

cavity of the conchal bone.

coronary sinus

the terminal portion of the great cardiac vein, which lies in the cardiac sulcus between the left atrium and ventricle, and empties into the right atrium.

dermoid sinus, dermal sinus

see dermoid sinus.

dorsal sagittal sinus

a large dural venous sinus located within the falx cerebri.

dura mater venous sinus

large channels for venous blood forming an anastomosing system between the layers of the dura mater of the brain.

ethmoidal sinus

that paranasal sinus consisting of the ethmoidal cells collectively, and communicating with the nasal meatuses.

facial sinus

see malar abscess.

frontal sinus

one of the paired paranasal sinuses in the frontal bone, each communicating with the middle meatus of the ipsilateral nasal cavity.

hair sinus

see sinus hair.

infraorbital sinus

an air-filled recess in the head of birds which lies lateral to the nasal cavity into which it opens.

intercavernous sinus

channels connecting the two cavernous sinuses, one passing anterior and the other posterior to the stalk of the pituitary gland.

interdigitalis sinus

the cutaneous pouch, which lies between the claws of sheep and some other ruminants and whose wall contains apocrine glands, and whose duct surfaces on the skin just above the coronets; it serves as a trail gland.

lymphatic sinus

irregular, tortuous spaces within lymphoid tissues through which lymph flows.

maxillary sinus

one of the paired paranasal sinuses in the body of the maxilla on either side, opening into the middle meatus of the ipsilateral nasal cavity. In the horse it is divided into two compartments that communicate independently with the nasal chambers. All other sinuses of the horse communicate with the nasal chambers via the caudal maxillary sinus.

nasal sinus

see paranasal sinuses (below).

sinus nerve

a branch of the glossopharyngeal nerve; carries the afferent fibers of the stretch receptors in the wall of the carotid sinus.

sinus node

see sinoatrial node.

occipital sinus

a venous sinus between the layers of dura mater, passing along the midline of the cerebellum.

paranasal s's

mucosa-lined air cavities in bones of the skull, communicating with the nasal cavity and including ethmoidal, frontal, maxillary and sphenoidal sinuses.

petrosal sinus (inferior)

a venous channel arising from the cavernous sinus and draining into the internal jugular vein.

petrosal sinus (superior)

one arising from the cavernous sinus and draining into the transverse sinus of the dura mater.

prostatic sinus

the dorsolateral recess between the seminal colliculus and the wall of the urethra.

pulmonary trunk sinus

spaces between the wall of the pulmonary trunk and cusps of the pulmonary valve at its opening from the right ventricle.

red pulp sinus

vascular storage in the spleen into which capillaries empty.

sinus reflex arc

afferent fibers are in the sinus nerve; these connect with the cardioinhibitory and vasomotor centers which control blood pressure and heart rate via sympathetic fibers to blood vessels; provides a route for the sinus reflex which relates pressure in the carotid sinus to the performance of the circulatory system.

renal sinus

a recess in the substance of the kidney, occupied by the renal pelvis, calices, vessels, nerves and fat.

sagittal sinus (inferior)

a small venous sinus of the dura mater of large animals found between the cerebral hemispheres and opening into the straight sinus.

sagittal sinus (superior)

a venous sinus of the dura mater that courses between the cerebral hemispheres and ends in the confluence of sinuses.

scleral venous sinus

see schlemm's canal.

sigmoid sinus

a venous sinus of the dura mater on either side, continuous with the straight sinus and draining into the internal jugular vein of the same side.

sphenoidal sinus

one of the paired paranasal sinuses in the body of the sphenoid bone of some species. In the horse it communicates with the nasal cavity via the frontal and caudal maxillary sinuses.

sphenoparietal sinus

one of the venous sinuses of the dura mater, emptying into the cavernous sinus.

splenic sinus

dilated venous channels in the substance of the spleen. See also red pulp sinus (above).

straight sinus

a venous sinus of the dura mater formed by junction of the great cerebral vein and inferior sagittal sinus, and ending in the confluence of sinuses.

tarsal sinus

a space between the calcaneus and talus.

tentorial sinus

straight sinus.

transverse dura mater sinus

a large venous sinus that runs in the attached border of the cerebellar tentorium on either side of the skull.

transverse pericardial sinus

a passage within the pericardial sac, between the aorta and pulmonary trunk cranioventrally, and the left atrium and cranial vena cava dorsally.

tympanic sinus

a deep recess on the medial wall of the middle ear.

urachal sinus

an anomalous closure of the urachal canal in the newborn in which the opening at the umbilicus remains open. The bladder is normal. It is the cause of persistent infection and swelling at the umbilicus in the young animal and may lead to cystitis and pyelonephritis.

urethral s

a small cavity in the glans penis of the horse, above the urethral process; as a recess of the fossa glandis it is usually filled with a small mass (bean) of inspissated smegma.

urogenital sinus

an elongated sac formed by division of the cloaca in the early embryo, which ultimately forms most of the vestibule, urethra and vagina in the female, and some of the urethra in the male.

uterine sinus

venous channels in the wall of the uterus in pregnancy.

uteroplacental sinus

blood spaces between the placenta and uterine sinuses.

venae caval sinus

the posterior portion of the right atrium into which the inferior and the superior vena cava open.

sinus venarum

a chamber which is the greater part of the right atrium into which the great veins discharge.

venous sinus, sinus venosus

1. the common venous receptacle in the heart of the early embryo that receives blood from the umbilical and vitelline veins and from the body via the ducts of Cuvier.

2. sinus of venae cavae.

vertebral sinus

a continuation of part of the common occipital vein in birds; it emerges from the foramen magnum and accompanies the vertebral vein.

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sinus 

A hollow space in bone or other tissue.
cavernous sinus One of the two venous sinuses in the dura mater of the brain extending on each side of the pituitary body, behind the orbit. It receives blood from the superior and the inferior ophthalmic veins and the central retinal veins. The third, fourth, fifth and sixth nerves pass through as well as the internal carotid artery. The cavernous plexus is located within this sinus. See carotid-cavernous fistula.
sinus circularis iridis See Schlemm's canal.
ethmoidal sinus Mucus-lined air cavities within the ethmoid bone, between the nose and the orbit. They drain into the nasal cavity. They contain the anterior and posterior ethmoidal nerves and blood vessels and are filled with air. They are separated from adjacent areas by very thin plates through which infection can pass easily and in particular ethmoiditis, which is the most common cause of orbital cellulitis.
sinus of Maier See lacrimal apparatus.
scleral s . See Schlemm's canal.
sinus venosus sclerae See Schlemm's canal.

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Patient discussion about sinus.

Q. My 21 year son has chronic sinus issues, I think, due to many high school sports injuries. Help! His ENT has recommended a "nose job" but our insurance will not cover it. Do you know of any holostic, nutritional or homeopathic solutions to keep this under control? When he gets a headache, it shuts him down and normally goes into a migraine.

A. Knows nothing about holystic treatment, but when I think about it, won't it be better to treat it definitely (more or less, I don't really know the situation) than postponing it with intermediate treatment? Have your tried to consult your docotr about that?

Q. sinus infection and Polups and I can't breath through my nose. What can I do?

A. You could also try to rub a little bit of vicks on your chest, throat, and a very small amount on you upper lip.

Q. How to cope with sinus infections during pregnancy as I found the infection. I have developed sinusitis while in middle school. It gets severe during winter. I do have to suffer a lot with sinus infection. Now I am pregnant and in my first trimester. How to cope with sinus infections during pregnancy as I found the infection difficult to handle before pregnancy…Are there any natural ways of cure?

A. You can manage with simple cold and cough for a day or two with simple procedure like steaming, use of mentholated product, saline drops etc. But if you are ill for more than two days with fever and several symptoms which you think cannot cope up, it is better to seek medical help. Treatment of sinus infection requires the use of medicine. There are medicines safe to be recommended during pregnancy and do follow the medicine with doctor’s advice. Take precautionary measures to get out of sinus during pregnancy to feel better

http://www.youtube.com/watch?v=MM21r5T_SM4&eurl=http://www.imedix.com/health_community/vMM21r5T%5ESM4_natural_treatments_sinusitis?q=sinus%20infection&feature=player_embedded