fissure /fis·sure/ (fish´er)
Fissure
fissure
fissure,
fissure,
fissure
Patient discussion about fissuring.
1. any cleft or groove, normal or otherwise, especially a deep fold in the cerebral cortex involving its entire thickness.
2. a fault in the enamel surface of a tooth.
abdominal fissure a congenital cleft in the abdominal wall.
anal fissure , fissure in ano painful lineal ulcer at the margin of the anus.
anterior median fissure a longitudinal furrow along the midline of the anterior aspect of the spinal cord and medulla oblongata.
basisylvian fissure the part of the sylvian fissure between the temporal lobe and the orbital surface of the frontal bone.
fissure of Bichat transverse f. (2).
branchial fissure
1. branchial cleft (1).
calcarine fissure see under sulcus.
central fissure see under sulcus.
collateral fissure see under sulcus.
enamel fissure fissure (2).
hippocampal fissure see under sulcus.
palpebral fissure the longitudinal opening between the eyelids.
parietooccipital fissure see under sulcus.
portal fissure porta hepatis.
posterior median fissure see under sulcus.
presylvian fissure the anterior branch of the fissure of Sylvius.
primary fissure of cerebellum that separating the cranial and caudal lobes in the cerebellum.
fissure of Rolando central sulcus of cerebrum.
sphenooccipital fissure the fissure between the basilar part of the occipital bone and the sphenoid bone.
sylvian fissure , fissure of Sylvius one extending laterally between the temporal and frontal lobes, and turning posteriorly between the temporal and parietal lobes.
transverse fissure
1. porta hepatis.
2. the transverse cerebral fissure between the diencephalon and the cerebral hemispheres.
fis·sure (f sh  r)n. 1. A deep furrow, cleft, or slit. 2. A developmental break or fault in the enamel of a tooth. |
Fissure
A deep crack.
Mentioned in: Diabetic Foot Infections
fissure
[fish′ər]
Etymology: L, fissura, cleft
1 a cleft or groove on the surface of an organ, often marking its division into parts, such as the lobes of the lung.
2 a cracklike lesion of the skin, such as an anal fissure.
fissure,
n 1. cracklike groove on an organ's surface.
2. lesion resembling a crack—for example, anal fissures.
2. lesion resembling a crack—for example, anal fissures.
)
Fissure.
fissure,
n a deep groove or cleft; commonly the result of the imperfect fusion of the enamel or adjoining dental lobes.
fissure, gingival,
n See cleft, gingival.
fissure, inferior orbital,
n the opening between the maxilla and the greater wing of the sphenoid bone through which the inferior ophthalmic vein, infraorbital artery, and infraorbital and zygomatic nerves travel.
fissure, pterygomaxillary
n the most posterior point in the anterior contour of the maxillary tuberosity.
fissure
1. a narrow slit or cleft, especially one of the deeper or more constant furrows separating the gyri of the brain.
2. in dermatology a deep crack in the skin, often through a scab, which penetrates into the subcutis.
abdominal fissure
a congenital cleft in the abdominal wall.
anal fissure, fissure in ano
a painful linear ulcer at the margin of the anus.
fissure of Bichat
transverse fissure (2).
branchial fissure
branchial cleft.
central fissure
fissure of Rolando.
collateral fissure
a longitudinal fissure on the ventral surface of the cerebral hemisphere between the fusiform gyrus and the hippocampal gyrus.
dorsal median fissure
1. a shallow vertical groove in the closed part of the medulla oblongata, continuous with the dorsal median sulcus of the spinal cord.
2. a shallow vertical groove dividing the spinal cord throughout its whole length in the midline dorsally. Called also dorsal median sulcus.
ear fissure
a split in the margin of the pinna which can gradually become larger from continued trauma.
hippocampal fissure
one extending from the splenium of the corpus callosum almost to the tip of the temporal lobe; called also hippocampal sulcus.
interhemispheric fissure
the fissure between the two cerebral hemispheres in birds.
interincisive fissure
fissure between the two incisive bones at the rostral end of the pig's face.
laryngeal fissure
the dorsal laryngeal furrow.
ligamentum teres fissure
on the diaphragmatic surface of the liver; houses the ligamentum teres.
fissure lines
in radiology, the variation in radiodensity indicating the division between lobes of the lung.
longitudinal fissure
the deep fissure between the cerebral hemispheres.
macropalpebral fissure
an enlarged palpebral fissure.
optic fissure
a ventral fissure in the developing optic cup through which blood vessels pass to the enclosed mesenchyme.
orbital fissure
see orbital foramen.
palatine fissure
a pair of fissures perforating the rostral extremity of the palate.
palpebral fissure
the opening between the eyelids.
perianal fissure
see perianal fistula.
petrotympanic fissure
the chorda tympani, on its way to merge with the lingual branch of the mandibular nerve, passes across the tympanic cavity and emerges at the petrotympanic fissure.
portal fissure
porta hepatis.
presylvian fissure
the ventral branch of the fissure of Sylvius.
reverse fissure
mediastinal fluid dissects into fissures between lung lobes causing fissure lines on radiographs to appear wide centrally and narrower peripherally.
Rolando's fissure, fissure of Rolando
a groove running obliquely across the superolateral surface of the cerebral hemisphere, separating the frontal from the parietal lobe. Called also central fissure and central sulcus.
round ligament fissure
one on the visceral surface of the liver, lodging the round ligament in the adult.
sylvian fissure, fissure of Sylvius
one extending laterally between the temporal and frontal lobes, and turning dorsally between the temporal and parietal lobes of the brain.
transverse fissure
1. porta hepatis.
2. the transverse cerebral fissure between the diencephalon and the cerebral hemispheres; called also fissure of Bichat.
tympano-occipital fissure
on the ventral surface of the skull, near the confluence of the osseous bulla and the occipital bone, this pair of fissures serve as conduits for the glossopharyngeal, vagal and accessory nerves in species without a jugular foramen.
ventral median fissure
a longitudinal furrow along the midline of the ventral surface of the spinal cord and medulla oblongata.
zygal fissure
a cerebral fissure consisting of two branches connected by a stem.
fissure
A cleft or a groove found in an organ. In the brain, it usually applies to the deepest cleft. See sulcus.
calcarine fissure Fissure on the medial aspect of the occipital lobe separating the upper and lower halves. Its anterior portion is in front of the parieto-occipital fissure and the posterior portion extends round the occipital pole and even appears for a short distance on the lateral surface where it ends at the lunate sulcus. Syn. calcarine sulcus. See visual area; line of Gennari.
embryonic fissure See optic fissure.
inferior orbital fissure An elongated opening lying between the lateral wall and the floor of the orbit. It is bounded anteriorly by the maxilla and the orbital process of the palate bone and posteriorly by the greater wing of the sphenoid bone. Syn. sphenomaxillary fissure. See infraorbital artery; zygomatic nerve; Table O4.
interpalpebral fissure See palpebral aperture.
optic fissure An invagination of the inferior portion of the optic stalk of the embryo. The hyaloid vessels pass through that fissure to supply the developing crystalline lens. In cases in which the invagination (or fissure) fails to fully close, colobomas will be formed. Syn. embryonic fissure; choroidal fissure. See hyaloid artery; optic cup.
palpebral fissure See palpebral aperture.
sphenoidal fissure See superior orbital fissure.
sphenomaxillary fissure See inferior orbital fissure.
superior orbital fissure An elongated opening lying between the roof and the lateral walls of the orbit, that is, between the two wings of the sphenoid bone. Syn. sphenoidal fissure. See abducens nerve; oculomotor nerve; ophthalmic nerve; trochlear nerve; superior ophthalmic vein; Table O4.
calcarine fissure Fissure on the medial aspect of the occipital lobe separating the upper and lower halves. Its anterior portion is in front of the parieto-occipital fissure and the posterior portion extends round the occipital pole and even appears for a short distance on the lateral surface where it ends at the lunate sulcus. Syn. calcarine sulcus. See visual area; line of Gennari.
embryonic fissure See optic fissure.
inferior orbital fissure An elongated opening lying between the lateral wall and the floor of the orbit. It is bounded anteriorly by the maxilla and the orbital process of the palate bone and posteriorly by the greater wing of the sphenoid bone. Syn. sphenomaxillary fissure. See infraorbital artery; zygomatic nerve; Table O4.
interpalpebral fissure See palpebral aperture.
optic fissure An invagination of the inferior portion of the optic stalk of the embryo. The hyaloid vessels pass through that fissure to supply the developing crystalline lens. In cases in which the invagination (or fissure) fails to fully close, colobomas will be formed. Syn. embryonic fissure; choroidal fissure. See hyaloid artery; optic cup.
palpebral fissure See palpebral aperture.
sphenoidal fissure See superior orbital fissure.
sphenomaxillary fissure See inferior orbital fissure.
superior orbital fissure An elongated opening lying between the roof and the lateral walls of the orbit, that is, between the two wings of the sphenoid bone. Syn. sphenoidal fissure. See abducens nerve; oculomotor nerve; ophthalmic nerve; trochlear nerve; superior ophthalmic vein; Table O4.
fissure
Dermatology A groove, cleft, or sulcus, which may or may not be normal. See Anal fissure, Slanted palpebral fissure Neurology A groove or narrow cleft that separates 2 parts, such as the cerebral hemispheres of the brain.
Patient discussion about fissuring.
Q. What are the dentists going to do if I have Pit and fissure caries? I look at my teeth and i see tiny black stuff on the fissures of my molars. I am so freakin scared. Are the dentists going to do something painful?
A. Well you will have to see a dentist if you want an answer on what kind of treatment they will offer you. Today dentists use good anesthesia so anything they will do is not supposed to be painful.
Read more or ask a question about fissuringHow to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
| ?Page tools | ||
|---|---|---|
|