ponsn.

Brit.

/pɒnz/, U.S.

/pɑnz/

Origin: Of multiple origins. Partly a borrowing from Latin. Partly formed within English, by clipping or shortening. Etymons: Latin pōns ; pons cerebri n.

Etymology: Ultimately < classical Latin pōns bridge < the same Indo-European base as (with a different ablaut grade) Sanskrit panthā , path(i)- path and ancient Greek πάτος path. Originally (in quot. 1671 at sense 1) shortened < pons cerebri n.Until the 20th cent. much less common than pons Varolii n.

Anatomy.

1. The part of the brainstem between the mesencephalon and the medulla oblongata, having an arched ventral surface with prominent transverse fibres, resembling a bridge between the two cerebellar hemispheres. Also called pons Varolii, pons cerebelli, pons cerebri.

ΘΚΠ

the world > life > the body > nervous system > cerebrospinal axis > brain > parts of brain > [noun] > pons

bridge1615

pons1671

pons cerebri1671

pons Varolii1693

pons cerebelli1846

mesocephalon1857

trapezium cerebri1890

1671 Philos. Trans. 1670 (Royal Soc.) 5 2061 They must needs be conveyed into the Principle of the Nerves (which, in his judgment, is the Pons).

1740 G. Thomson tr. M. Lyser Art Dissecting Human Body vi. 127 Two, and sometimes more Protuberances, which make the Pons according to Varolius.

1754 S. Mihles tr. A. von Haller Physiol. I. xii. 299 Another part harder from that portion of the crus of the cerebellum, which lies next the pons.

a1856 W. Hamilton Lect. Metaphysics (1861) I. App. 420 The average of children under seven, exhibits the Pons, in proportion to the cerebellum, much smaller than in the average of adults.

1875 H. Walton Pract. Treat. Dis. Eye (ed. 3) 324 Disease of the pons is a very rare condition.

1899 T. C. Allbutt et al. Syst. Med. VI. 807 In thirty cases of pons tumour..in five only was there defect of hearing.

1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) xix. 324 Just above the medulla lie the pons, the midbrain, and the thalamus.

1971 U. K. Le Guin Lathe of Heaven (1973) ii. 23 Now the pons was active, and the trace from the hippocampus showed a five-second cycle.

1990 Brain 113 141 Descending branches penetrate the pons at just above the medullopontine sulcus. Some of these branches may constitute the superior and the posterior rami of the lateral area of the medulla.

2. With distinguishing scientific Latin word: any of various other structures linking parts of an organ.

ΘΚΠ

the world > life > the body > system > [noun] > organ > specific part of

fund1636

fundus1659

pons1798

1798 A. Bell Anatomia Britannica 29 An excavation called by Vicq. d'Azyr, the Fossa of the Nervi Oculo-musculares. The medullary substance forming the bottom of this cavity is called by authors, Pons Tarini.

1833 Philos. Trans. (Royal Soc.) 123 743 The umbilical vein is also contained in a fissure, which is frequently converted into a canal by a process of the liver, called the pons hepatis, extending from the lobulus quadratus to the left lobe.

1849 S. G. Morton Illustr. Syst. Human Anat. 546 Its bottom is formed of a layer of vesicular neurine that seems to connect the proximate margins of the cerebral peduncles with each other, and with the corpora albicantia. This is the pons Tarini.

1897 Lancet 30 Jan. 292/2 The pons zygomaticus is more prominent [on the left], as is the temporal bone in the part above the pavilion of the ear.

1912 Lancet 10 Aug. 365/2 To the left it [sc. the quadrate lobe] is connected with the left lobe by a well-marked pons hepatis.

2003 Hepatogastroenterology 50 235 A metastatic liver carcinoma which developed from the pons hepatis and presented as an extrahepatic mass on ultrasonography and computed tomography is reported.

This entry has been updated (OED Third Edition, December 2006; most recently modified version published online March 2022).

单词	pons
释义	ponsn. Brit. /pɒnz/, U.S. /pɑnz/ Origin: Of multiple origins. Partly a borrowing from Latin. Partly formed within English, by clipping or shortening. Etymons: Latin pōns ; pons cerebri n. Etymology: Ultimately < classical Latin pōns bridge < the same Indo-European base as (with a different ablaut grade) Sanskrit panthā , path(i)- path and ancient Greek πάτος path. Originally (in quot. 1671 at sense 1) shortened < pons cerebri n.Until the 20th cent. much less common than pons Varolii n. Anatomy. 1. The part of the brainstem between the mesencephalon and the medulla oblongata, having an arched ventral surface with prominent transverse fibres, resembling a bridge between the two cerebellar hemispheres. Also called pons Varolii, pons cerebelli, pons cerebri. ΘΚΠ the world > life > the body > nervous system > cerebrospinal axis > brain > parts of brain > [noun] > pons bridge1615 pons1671 pons cerebri1671 pons Varolii1693 pons cerebelli1846 mesocephalon1857 trapezium cerebri1890 1671 Philos. Trans. 1670 (Royal Soc.) 5 2061 They must needs be conveyed into the Principle of the Nerves (which, in his judgment, is the Pons). 1740 G. Thomson tr. M. Lyser Art Dissecting Human Body vi. 127 Two, and sometimes more Protuberances, which make the Pons according to Varolius. 1754 S. Mihles tr. A. von Haller Physiol. I. xii. 299 Another part harder from that portion of the crus of the cerebellum, which lies next the pons. a1856 W. Hamilton Lect. Metaphysics (1861) I. App. 420 The average of children under seven, exhibits the Pons, in proportion to the cerebellum, much smaller than in the average of adults. 1875 H. Walton Pract. Treat. Dis. Eye (ed. 3) 324 Disease of the pons is a very rare condition. 1899 T. C. Allbutt et al. Syst. Med. VI. 807 In thirty cases of pons tumour..in five only was there defect of hearing. 1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) xix. 324 Just above the medulla lie the pons, the midbrain, and the thalamus. 1971 U. K. Le Guin Lathe of Heaven (1973) ii. 23 Now the pons was active, and the trace from the hippocampus showed a five-second cycle. 1990 Brain 113 141 Descending branches penetrate the pons at just above the medullopontine sulcus. Some of these branches may constitute the superior and the posterior rami of the lateral area of the medulla. 2. With distinguishing scientific Latin word: any of various other structures linking parts of an organ. ΘΚΠ the world > life > the body > system > [noun] > organ > specific part of fund1636 fundus1659 pons1798 1798 A. Bell Anatomia Britannica 29 An excavation called by Vicq. d'Azyr, the Fossa of the Nervi Oculo-musculares. The medullary substance forming the bottom of this cavity is called by authors, Pons Tarini. 1833 Philos. Trans. (Royal Soc.) 123 743 The umbilical vein is also contained in a fissure, which is frequently converted into a canal by a process of the liver, called the pons hepatis, extending from the lobulus quadratus to the left lobe. 1849 S. G. Morton Illustr. Syst. Human Anat. 546 Its bottom is formed of a layer of vesicular neurine that seems to connect the proximate margins of the cerebral peduncles with each other, and with the corpora albicantia. This is the pons Tarini. 1897 Lancet 30 Jan. 292/2 The pons zygomaticus is more prominent [on the left], as is the temporal bone in the part above the pavilion of the ear. 1912 Lancet 10 Aug. 365/2 To the left it [sc. the quadrate lobe] is connected with the left lobe by a well-marked pons hepatis. 2003 Hepatogastroenterology 50 235 A metastatic liver carcinoma which developed from the pons hepatis and presented as an extrahepatic mass on ultrasonography and computed tomography is reported. This entry has been updated (OED Third Edition, December 2006; most recently modified version published online March 2022). < n.1671
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