(n.) A pit, groove, cavity, or depression, of greater or less depth; as, the temporal fossa on the side of the skull; the nasal fossae containing the nostrils in most birds.
Example Sentences:
(1) The 38 control fetuses had normal-appearing posterior fossae.
(2) These cases show that an examination of the whole neuraxis is as important in patients with midline posterior fossa cysts as it is in patients with developmental syringomyelia or Chiari I malformation.
(3) For the case described by the author primary tearing of the chiasma due to sudden applanation of the skull in the frontal region with burstfractures in the anterior cranial fossa is assumed.
(4) In 5 of the 7 patients with an initially abnormal pituitary fossa, serial radiological studies revealed remodelling in 3.
(5) (b) abnormal morphologic of the glenoid fossa, mandibulars condyle and the neck of mandibula were seen.
(6) The blood flow velocity waveform recorded noninvasively from the brachial artery in the antecubital fossa was used as basis for quantitatively estimating a stroke flow index.
(7) This can be combined with a middle fossa approach in patients with a positive Schirmer's test.
(8) Because of the inherent limitations of computed tomography in the visualization of posterior fossa structures, MR imaging should be considered the initial screening procedure in the assessment of patients with trigeminal neuralgia.
(9) To identify the origin of scalp-recorded far-field negativity of short-latency somatosensory evoked potentials to median nerve stimulation (designated N18), direct records were made from the thalamus and ventricular system during 4 stereotaxic and 3 posterior fossa operations.
(10) Two term newborn infants born by frank breech delivery had posterior fossa hemorrhage diagnosed by CT scan within the first 72 hours of life and underwent successful surgical drainage of hematoma.
(11) Warts were confined to the lips in 27 (56%) of 48 patients with meatal warts; in an additional 5 patients with meatal warts the warts arose from deep in the fossa navicularis and in 16 patients with meatal warts there were additional warts in the fossa navicularis invisible on clinical examination.
(12) A comparative cephalometric and tomographic study prior to the treatment and after completion of the treatment revealed the following results: an improvement in the occlusal relationships due to both skeletal (an anterior mandibular displacement and an increase in the mandibular length) and dentoalveolar changes; it was possible to produce a growth stimulation of the mandibular condyle associated with a translation of the glenoid fossa by using an elastic activator; there was a direct correlation between the effects of the treatment and the age period of the patients (mixed dentition).
(13) Epistaxis was common in tumors of the ethmoid sinus and nasal fossae, while pain was related to lesions of the maxillary sinus.
(14) Eleven of 15 patients had middle cranial fossa involvement; cavernous sinus extension was observed in six patients.
(15) Stab wounds to the temporal fossa appear as a characteristic clinical entity.
(16) Our impression is that preoperative carotid artery occlusion and a middle fossa approach for tumor resection can be performed in a young patient with acceptable morbidity and at least short-term benefit.
(17) The other structures or regions that were involved, in decreasing order of frequency, were the sphenoid sinus (26.7%), nasal fossa (21.8%), and ethmoid sinus (18.3%).
(18) The association of an arachnoidal cyst in the middle cranial fossa with a subdural haematoma or intracystic bleeding is emphasised.
(19) At the same time the data are obtained on variations in topography of the chorda tympani at various form of the intratemporal fossa.
(20) A patent cochlear aqueduct indicated on computed tomography scan was found and repaired through a posterior cranial fossa approach.
Fovea
Definition:
(n.) A slight depression or pit; a fossa.
Example Sentences:
(1) Thirteen patients had had a posterior dislocation with an associated fracture of the femoral head located either caudad or cephalad to the fovea centralis (Pipkin Type-I or Type-II injury), one had had a posterior dislocation with associated fractures of the femoral head and neck (Pipkin Type III), two had had a posterior dislocation with associated fractures of the femoral head and the acetabular rim (Pipkin Type IV), and three had had a fracture-dislocation that we could not categorize according to the Pipkin classification.
(2) Foveal involvement included coarse foveal granularity, thinning of the foveal retinal pigment epithelium, increasing encirclement of the fovea with focal areas of atrophy, and minimal macular drusen.
(3) Detection thresholds at 10 Hz and high grating contrasts were approximately 11-15 arcsec in the fovea and 37-47 arcsec at 30 degrees eccentricity.
(4) These data reject the possibility that albino central vision is similar to normal peripheral vision, but the results are predictable on the hypothesis that the central retina of albinos is a spatially magnified (underdeveloped) version of the normal fovea.
(5) Macular pigment density was determined by comparing sensitivity under these conditions for the fovea, where macular pigment is maximal, and 5 degrees temporally.
(6) We confirmed this observation (Experiment I) and have mapped out a 2 dimensional "perceptive field" for crowding in the fovea using a 2 dot target (Experiment II).
(7) At earlier fetal ages, the site of the future fovea was identified by several criteria that included peak density of ganglion cells, lack of blood vessels in the inner retinal layers, arcuate fiber bundles, and the absence of rod outer segments in the photoreceptor layer.
(8) By reconstructing the fovea from serial sections, we were able to compare the densities of cones, cone pedicles and ganglion cells; in this way we found that there are more than three ganglion cells per foveal cone.
(9) There are two separate regions of high magnification factor, the projection areas of the fovea and the middle of the red area in the retina, each of which has a correspondingly high density of neurones in the ganglion cell layer.
(10) From 1967 to 1987, 16 patients underwent repair of chronic cerebrospinal fluid rhinorrhea in the cribriform plate or fovea ethmoidalis at the University of Iowa with an osteomucoperiosteal flap.
(11) The fovea is represented at the lateralmost portion of MT, while the retinal periphery is represented medially.
(12) The greatest thickness of cartilage was always found lateral of the fovea capitis at the medial margin of the pressure area ("Druckbündelzone") of the cancellous bone, whereas the dorsomedial part of the head showed a zone of thinning, extending to the medial margin of the fovea capitis.
(13) The nature and size of a localized scotoma such as the type caused by a macular lesion was estimated by measuring spatial contrast sensitivity as a function of retinal area centered on the fovea.
(14) In divergent squint, the fovea competes with the much weaker nasal hemifield.
(15) The nonfreezable water content (bound water) showed a decreasing gradient along the optic axis from lens to fovea; an opposite trend than that found in bovine vitreus.
(16) ERGs recorded by this technique can be considered focal since (i) they show a sharp fall-off in amplitude when the stimulus is displaced from the fovea, and (ii) they are no longer recordable when the stimulus is centered on the optic disk or on a large macular scar.
(17) This was compared with MF at the dorsal lateral geniculate nucleus and at striate cortex, revealing that the relative representation of the fovea increases substantially in both thalamus and cortex.
(18) The authors present and discuss the results obtained and suggest that photocoagulation of subretinal new vessels not involving the fovea can be worth performing.
(19) Their receptive fields were usually large, not restricted to the contralateral visual field and always included the fovea.
(20) We feel that tenuous attachments of the vitreous body to the fovea could exert traction on the vitreo-retinal interface or shrinkage of a fibrocellular membrane on the inner foveal surface could lead to the observations made by us.