SINUS 



1330 



SINUS 



S. of Coronary Vein. See S. , Coronary {of the heart) . 

 S. coronoideus. See S., Circular. S. du corps 

 calleux. See Callosal Fissure. S. costales. See 

 Incisures costales. S. costarii. See Fovea articulares 

 lateralis. S. coxae. See Acetabulum. S., Cranial, 

 one of certain venous channels between the folds of 

 the dura lined with a continuation of the tunica intima 

 of the veins. S. craniens. See S., Cranial. S. 

 of Cuvier. See Ducts of Cuvier. S., Diploic, 

 channels containing veins which traverse the diploe 

 of cranial bones. S. ductus lactiferi. See Ampulla 

 ductus lactiferi. S. durae matris. See S. , Cranial. 

 S. ellipticus. See S., Circular. S. epididymidis, 

 the furrow between the posterior surface of the epi- 

 didymis and the testicle. S., Ethmoid. See Ethmoid 

 Cells. S. ethmoidales. See Ethmoid Cells. S. of the 

 External Meatus, a space at 

 the bottom of the external audi- 

 tory canal between the concave 

 inferior wall of the osseous 

 meatus and the membrana tym- 

 pani. S. falciformis inferior. 

 See S., Inferior Longitudinal. 

 S. falciformis superior (seu 

 triangularis). See S., Superior 

 Longitudinal. S. fossae basi- 

 laris. See S., Transverse. S. 

 fraenuli, the depression at the 

 side of the frenum of the penis. 

 S., Frontal, an irregular cavity 

 in the frontal bone, underlying 

 the prominence at the root of 

 the nose, and over the superior 

 orbital margin, extending up- 

 ward and outward between the 

 two tables of the bone, separated 

 from its fellow of the opposite 

 side by a thin septum, and com- 

 municating, with the nose by the 

 infundibulum. S., Galactopho- 

 rous. See Ampulla ductus lac- 

 tiferi. S. genae pituitarius 

 ( highmori ). See Maxillary 

 Antrum. S., Genital, the cleft 

 of the vulva. S., Genito- 

 urinary. See S. , Urogenital. S. 

 Great {of the aorta), a dilatation 

 generally found on the right side 

 of the ascending portion of the 

 aorta. S. of Highmore. See 

 Maxillary Antrum. S. hippo- 

 campi inferior. See Hippocam- 

 pus Major. S., Inferior In- 

 tercavernous, the lower of the 

 two veins sometimes replacing 

 the single sinus intercavernosus anterior. S., Infe- 

 rior Longitudinal, a venous sinus which extends 

 along the posterior half of the lower border of 

 the falx cerebri and terminates in the straight sinus 

 near the anterior margin of the tentorium. S., In- 

 ferior Petrosal, a large venous sinus arising from the 

 cavernous, running along the lower margin of the 

 petrous portion of the temporal bone, and joining the 

 lateral sinus, to form the internal jugular vein. S. in- 

 tercavernosus anterior, the anterior half of the circu- 

 lar sinus. S. intercavernosus posterior, the poste- 

 rior half of the circular sinus. S., Intercavernous, 

 the anterior and posterior halves of the circular sinus. 

 S., Internal. See S. , Straight. S. jugularis spurius. 

 See .V., Petrosquamous. S. of the Jugular Vein, the 

 bulbi ven?e jugularis (distinguished as inferior, intemus, 

 and superior). S. of Kidney, the prolongation inward 



of the hilum of the kidney. S. lacrimales. See Cells, 

 Anterior Ethmoid. S. lacrimalis. See S. , Lacrymal. 

 S., Lacrymal, a small pouch formed by a fold of skin 

 at the inner angle of the eye in the deer and some 

 other quadrupeds. It can be opened or shut at will, 

 has no connection with the lacrymal passages, and 

 contains a gland which secretes a viscid substance re- 

 sembling the cerumen of the ear. S., Lacteal. See 

 Ampulla ductus lactiferi. S. lacteus lactiferus. Set 

 Ampulla ductus lactiferi. S. lactiferi secundaria 

 dilatations of the milk-ducts in addition to the ampulla. 

 S. laiteux. See Ampulla ductus lactiferi. S. laryn- 

 gis {of Morgagni). See Ventricle of the Larynx. 

 S. of the Larynx. See Ventricle of the Larynx. S. 

 Lateral, a venous sinus which begins at the torculai 

 and runs horizontally on the inner surface of th< 



Medisection of Brain, Showing Important Sinuses. 

 . Falx cerebri. 2,2. Its convex border, with the great longitudinal sinus. 3. Its concaM 

 border. 4, 4. Inferior longitudinal sinus. 5. Base of falx cerebri. 6. Straight sinuj 

 7. Apex of falx cerebri. 8. Right half of the tentorium, seen from below. 9. R 

 lateral sinus. 10. Superior petrosal sinus. 11. Inferior petrosal sinus. 12. Posteri 

 occipital sinus. 13. Falx cerebelli. 14. Optic nerve. 15. Motor oculi. 16. Pathetic. 

 Trigeminus. 18. Abducens. 19. Facial and auditory nerves. 20. Glosso-pharyngei 

 pneumogastric and spinal accessory nerves. 21. Hypoglossal nerve .' 

 vical nerve. 23. Second cervical nerve. 24, 24. Upper extremity of liganiemu| 

 denticulatum. 



occipital bone to the base of the petrous portk 

 of the temporal bone, where it unites with the inferi 

 petrosal sinus to form the internal jugular vein. 

 laterales seu superioris. See Lacuna- la, 

 superioris. S. lateralis. See S., Lateral. S. long! 

 tudinales columnae vertebralis, the longitudii 

 spinal veins. S. longitudinalis cerebri. Sec .V . -V 

 rior- Longitudinal. S. longitudinalis inferior (sj 

 minor). See S., Inferior Longitudinal. S. long; 

 tudinalis superior. See S., Superior J.ongitutiinA 

 S. lunatus radii, the semilunar cavity of thi 

 S. lunatus ulnae. See Sigmoid Cavity, I 

 Lymph, small spaces scattered throughout the p| 

 enchyma of a lymphatic gland, between the pulp "1 1 

 gland and the trabecules or dilatations of the lymphs 

 vessels. S. maieri, an anomalous dilatation nj 

 which both canaliculi lacrimales open. S. of t 



