See Also: Zu Gengzhi(encyclopedia)
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medicine(1)(dictionary)
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medicine man(encyclopedia)
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hyopharyngeus (medicine) and Zu Gengzhi (sh)


hyopharyngeus (medicine)


hyopharyngeus -->
middle constrictor muscle of pharynx
Origin, stylohyoid ligament, lesser cornu of the hyoid bone (chondropharyngeal part) and greater cornu of the hyoid bone (ceratopharyngeal part); insertion, pharyngeal raphe in the posterior wall of the pharynx; action, narrows pharynx in the act of swallowing; nerve supply, pharyngeal plexus.

Synonym: musculus constrictor pharyngis medius.


Zu Gengzhi (sh)




also known as Zu Xuan

born งใ 480, Jiankang, China
died งใ 525, China

Chinese government official, mathematician, astronomer, and son of Zu Chongzhi.

Beginning in 504, he actively advocated his father's Daming calendar and finally succeeded in getting it officially adopted in 510. His astronomical observations with gnomons allowed him to measure the angular distance between Polaris and the celestial north pole. A mathematical fragment of his was appended by Li Chunfeng to the commentary on Jiuzhang suanshu (Nine Chapters on the Mathematical Procedures), a Chinese classic probably compiled in the 1st century AD. Fragments of his writings are also found in the astronomical chapter of Suishu ("History of the Sui Dynasty"). His fame as a mathematician rests primarily on his derivation and proof of the formula for the volume of a sphere.