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The pyriform sinus (also piriform recess, piriform sinus, piriform fossa, or smuggler's fossa) is a small recess on either side of the laryngeal inlet. It is bounded medially by the aryepiglottic fold, and laterally by the thyroid cartilage and thyrohyoid membrane. [1] The fossae are involved in speech.
Piriform sinus, piriform recess or piriform fossa, synonyms referring to one of the four sites of the hypopharynx The (notionally) pear-like female body shape (gynoid shape) Pear-shaped obesity (adiposity highest on hips and thighs), in contrast with apple-shaped obesity (central adiposity, abdominal obesity )
The piriform aperture, pyriform aperture, or anterior nasal aperture is a pear-shaped opening in the human skull. Its long axis is vertical, and narrow end upward; in the recent state it is much contracted by the lateral nasal cartilage and the greater and lesser alar cartilages of the nose .
The thicker side of the piriformis is medial (closer to the center of the body). The function of the piriformis is as an external thigh rotator. When the hip is extended, such as standing, the piriformis rotates the thigh outwards. When the hip is flexed, such as sitting, the piriformis abducts the hip (spreading the legs).
The function of the sinus cavities within the cranial bone (skull) is not entirely clear. Beliefs about their possible function include: [1] Sinus cavities allow for voice resonance; They help filter and add moisture to any air that is inhaled through the nasal passages and in the removal of unwanted particles from the sinus cavities.
The aryepiglottic folds are triangular folds of mucous membrane of the larynx.They enclose ligamentous and muscular fibres. They extend from the lateral borders of the epiglottis to the arytenoid cartilages, hence the name 'aryepiglottic'.
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The piriform cortex, or pyriform cortex, is a region in the brain, part of the rhinencephalon situated in the cerebrum. The function of the piriform cortex relates to the sense of smell . Structure