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The jaw, suprahyoid, and extrinsic tongue muscles are described for eight species of New World squirrels, spanning more than an order of magnitude in body mass. Anatomical differences are discussed in the light of body size, natural history, and phylogeny. The relative sizes of different muscles, their orientations, and the shapes and positions of their(More)
This study was designed to investigate the presence of nitric oxide in human squamous cell carcinoma of the head and neck. We localized the activity of nitric oxide synthase in these tumors through immunohistochemical analysis using antibodies to L-citrulline (a byproduct of nitric oxide synthase), to inducible nitric oxide synthase, and to constitutive(More)
Using a rat model, the authors investigated the role of nitric oxide (NO) in endotoxin-induced middle ear effusion (MEE). After the eustachian tube was obstructed, the middle ear was transtympanically injected with 35 microL of either 1 mg/mL lipopolysaccharide (LPS) or LPS and 1 mmol/L N-nitro-L-arginine methyl ester (L-NAME), a competitive inhibitor of NO(More)
A method is described for the sequential detergent and high ionic strength extraction of human amnion with the progressive enrichment of the intermediate filament (IF) cytoskeleton and its associated structures including hemidesmosomes (HD). TEM of the extracted epithelium in situ reveals IF bundles beneath the apical cell surface, around the nucleus and at(More)
In a rat model, we investigated the role of tumor necrosis factor (TNF) and interleukin-1 (IL-1) in endotoxin-induced middle ear effusions (MEEs). After the eustachian tube was obstructed, the middle ear was transtympanically injected with 35 microL of either 1) 1 mg/ mL lipopolysaccharide (LPS); 2) LPS and 100 micrograms TNF binding protein (TNFbp); 3) LPS(More)
We know: how to recover stereo camera geometry (given internal camera parameters). We would like: to automate this – in particular, as we go from 2 to many images. An image is characterized by • intensity values • the spatial distribution of these values An analysis/quantification of these characteristics is fundamental to just about any higher-level vision(More)
The presence of active nitric oxide synthase (NOS) in the spiral ganglion cells of the cochlea suggests that the neuromodulator nitric oxide (NO) may play a role in hearing. This study investigated the effects of sodium nitroprusside (SNP), an NO donor, upon cochlear function mediated through its activation of guanylate cyclase. In gerbils, cochlear(More)
We document the anatomical architecture and frequency of occurrence of variations in the branching pattern of the brachiocephalic artery and the origin of the internal iliac arteries in the domestic cat, a widely used model organism in both anatomical training and research. Based on the study of 56 preserved specimens, we observed three distinct(More)
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