The pars triangular is a portion of Broca's area. The convolutions that form the inferior and caudal extent of the pars triangularis include the anterior horizontal and anterior ascending rami of the sylvian fissure, respectively. To learn if there are anatomic asymmetries of the pars triangularis, these convolutions were measured on volumetric magnetic resonance imaging scans of 11 patients wh...

Ophthalmia nodosa with vitreoretinal involvement is rare and may cause permanent loss of eye due to persistent inflammation of the eye. A young female patient having multiple caterpillar hair in the eye including cornea, anterior chamber, sclera, and pars plana presented with recurrent vitritis and pars planitis. Ultrasound biomicroscopy played a vital role and helped in localizing the hair emb...

PURPOSE To better characterize the cellular constituents of cysts in the peripheral retina and pars plana of the adult monkey. METHODS Frozen sections of the peripheral retinal margin and pars plana from monkeys (Macaca nemestrina) between 1 and 15 years of age were stained with toluidine blue or immunolabeled with a variety of glia- and neuron-specific antibodies. RESULTS In animals 1 to 2...

Protease-activated receptors (PARs) belong to the superfamily of seven transmembrane domain G protein-coupled receptors. Four PAR subtypes are known, PAR-1 to -4. PARs are highly homologous between the species and are expressed in a wide variety of tissues and cell types. Of particular interest is the role which these receptors play in the brain, with regard to neuroprotection or degeneration u...

The ultrastructures of the pituitary pars intermedia of 11 male sheep about 1-13 months of age were observed. The following cells were distinguished in the sheep pars intermedia: pars intermedia glandular cells, marginal cells, interstitial cells, follicular cells, pars distalis-like granular cells, degenerating cells and mast cells. The pars intermedia glandular cells contain a well-developed ...

Evidence from electrophysiological studies has suggested an inhibitory interaction between GABAergic neurons in substantia nigra pars reticulata and dopaminergic neurons in pars compacta. However, that this inhibitory interaction is due to a projection from pars reticulata to pars compacta has never been demonstrated directly, nor has the GABAergic neuron that mediates the interaction been iden...

The pars opercularis occupies the posterior part of the inferior frontal gyrus. Electrical stimulation or damage of this region interferes with language production. The present study investigated the morphology and morphometry of the pars opercularis in 108 normal adult human cerebral hemispheres by means of magnetic resonance imaging. The brain images were transformed into a standardized propo...