GENERAL INDEX. 



823 



NERVOUS SYSTEM, Vertebrata continued. 



Amphibia and Keptilia, i. 100; iii. 620. 

 brain, iii. 620. 



weight compared with that of the body, iii. 



tr.U 

 olfactory tubercles, iii. 621. 



brain and spinal cord of lizard, iii. 



621. 



optic lobes, iii. 621. 

 cerebellum, iii. 621. 

 Aves, iii. 621. 



brain, i.i. 622. 



weight compared with that of the body, iii. 



622. 



cerebral hemispheres, 622. 

 optic lobes, iii. 622. 

 cerebellum, iii. 623. 

 Mammalia, iii. 623. 



table of the relative proportions of the brain and 

 spinal marrow in the lour classes of Verte- 

 brata, iii. 623. 

 table of relative proportions of body and brain 



in the four classes of Vertebrata, iii. 624. 

 cerebral hemispheres, iii. 624, 

 corpus callosum, iii. t '2~>. 

 ventricles of brain, iii. 625. 

 olfactory nerves, Hi. 625. 

 optic lobes, iii. 625. 

 cerebellum, iii. b25. 



table showing the actual and relative lengths of 

 the cerebral hemispheres and the cerebellum 

 in the Mammalia, iii. 626. 

 general remarks in conclusion, iii. 626. 

 See also under the various headings of classes, &c. f of 



animals. 



NERVOUS CENTRES (in human anatomy), iii. 626. 

 definition, iii. 626. 

 general and descriptive anatomy of the nervous centres, 



iii. 627. 



Coverings of the nervous centres, iii. 627. 

 of the ganglions, iii. 627. 

 of the spinal cord and brain, iii. 627. 

 dura mater, iii. 627. 

 spinal, iii. 628. 

 cranial, iii. 628. 



processes, iii. 629. 



falx cerebri, iii. 6C9. 

 tentorium cerebelli, iii. 629. 

 falx cerebelli, iii. 629. 

 vessels of the spinal dura mater, iii. 629. 

 of the cranial dura mater, iii. 630. 

 sinuses, 631. 



superior longitudinal, iii. 631. 



inferior longitudinal, iii. 631. 



strait, iii. 631. 



torcular Herophili, iii. 631. 



lateral sinuses, iii. 632. 



occipital, iii. 632. 



petrosal, superior and inferior, iii. 



632. 



transverse, iii. 632. 

 cavernous, iii. 633. 

 circular, iii. 633. 

 pia mater, iii. 633 



of the spinal cord, iii. 633. 



of the brain, iii. 6J4. 



continuations of the pia mater into the 



cerebral ventricles, iii. 634. 

 choroicl plexuses of the lateral ventri- 

 cle, iii 6:>4. 



velum interpositum, iii. 6.55. 

 choroid plexuses of the fourth ventri- 

 cle, iii. 635. 

 crystalline formations in the 



choroid plexuses, &c., iii. 635. 

 connexions, &c. ot the pia mater, iii. 636. 

 in reference to pathology, iiL 636. 

 arachnoid, iii. 636. 

 spinal, iii. 636. 

 arachnoid bag or sac, iii. 636. 

 sub-arachnoid cavity, iii. 636. 

 internal arachnoid, hi. 637. 

 cerebral, iii. 637. 

 cerebro-spinal fluid, iii. 638. 



fluid in the cerebral ventricles, iii. 640. 

 orifice of communication, as described by 

 iMajendie, between the fourth ventricle 

 and the sub-arachnoid space, iii. 640. 

 estimate of the quantity of the sub-arach- 

 noid fluid, iii. 641. 



cerebro -spinal fluid in reference to patho- 

 logy, iii. 642. 



manner of its secretion, ii:. 643. 

 physical and chemical properties of the 



cerebro-spinal fluid, analyses, iii. 643. 

 use of the cerebro-spinal fluid, iii. 643. 

 glamlultc Pacchioni, iii. 644. 



are they natural structures ? iii. 645. 

 ligamentum dentatum, iii. 64-5. 

 General remarks on the structure of nervous centres, 



i. 646. 

 white nervous matter, iii. 646. 



NERVOUS CENTRES continued. 



grey nervous matter, iii. 647. 

 development, iii. 648. 

 remarks on the great simplicity of form of the 



elements of grey nervous matter, iii. 649. 

 pigment, ii. 649. 

 Structure of ganglions, iii. 649. 

 Cerebro-spinal centre, iii. 650. 



Spinal cord, iii. 650. 

 position, iii. 651. 



shape, iii. 651. 



bulk, iii. 651. 



length and circumference, iii. 65L 



fissures, iii. 652. 



anterior, iii. 652. 

 posterior, iii. 652. 

 white commissure, iii. 652. 

 grey commissure, iii. 652. 

 internal structure as shown by transverse sec- 

 tions, iii. 653. 



antero-lateral columns, iii. 653, 654. 

 posterior columns, iii. 653, 654. 

 arrangement of the grey matter in the spinal 



cord, iii. 653. ' 

 conclusions, iii. 654. 

 is there a central canal in the spinal cord ? iii. 



655. 

 blood-vessels, iii. 656. 



anterior spinal artery, iii. 656. 

 posterior spinal arteries, iii. 657. 

 veins, iii. 657. 

 spinal nerves, origin, anterior and posterior 



roots, ganglion, iii. 657. 

 sub-occipital nerve, iii. 658. 

 characters proper to the nerves of particu- 

 lar regions, iii. 658. 

 cervical nerves, iii. 658. 

 dorsal nerves, iii. 658. 

 lumbar nerves, cauda equina, iii. 



658. 



relations of the roots of the nerves to the 

 columns of the cord and to the grey 

 matter, as determined by dissection, iii. 

 659- 



as determined by physiology, iii. 660. 

 Encephalon, iii. 661. 



size compared with that of the body in diffe- 

 rent animals, iii. 661. 

 compared with that of the encephalic 



nerves, iii. 662. 

 weight of the human encephalon, iii. 662. 



table showing the average absolute weight 

 of the human encephalon, in males 

 and females, iii. 662. 

 relative weight of encephalon to cere- 

 bellum, &c. in males and females, 

 iii. 663. 



relative weight of entire body to ence- 

 phalon, cerebrum, cerebellum, &c. 

 iii. 663. 



conclusions, iii. 664. 

 absolute weight of the brain of the elephant 



and whale, iii. 664. 



weight of brain of some animals greater 

 than that of man, relatively to the 

 weight of their bodies, iii. 664. 

 conclusions of Tiedeman, deduced from 



his observations, iii. 664. 



remarks on the comparison of the brain of 

 man with that of the lower animals, iii. 664. 

 the brain in different races of mankind, iii. 665. 

 method of examining the brain, iii. 667. 

 method of Willis, iii. 668. 



of Reil, Gall, and Spurzheim, iii. 669. 

 surface of the encephalon, iii. 670. 

 shape of the brain, iii. 670. 

 superior and lateral surfaces, iii. 670. 

 base of the brain, iii. f>70. 



anterior segment, olfactory sulcus, iii. 



670. 



fissure of Sylvius, locus pcrforatus 

 anticus, island of Reil, iii. 671, 

 672. 

 middle segment, iii. 672. 



pituitary process, tuber cinereum, 



iii. 673. 

 optic Iracts and optic commissure, 



iii. 673. 



corpora albicantia, iii. 673. 

 crura cerebri, intercrural space, 

 substantia perforata, pons Ta- 

 rini, iii. 673. 

 transverse or horizontal fissure, 



iii. 673. 



circle of Willis, iii. 673. 

 posterior segment, iii. 673. 

 dissection of the brain from above down- 

 wards, iii 674. 

 centrum ovale minus and majus, iii. 



674. 



corpus callosum, longitudinal tracts, 

 iii. 674. 



