Central Origin And Relation
Central Origin And Relation Of The Cranial Nerves. The Cranial Nerves Are Twelve In Number And Are Enumer Ated From Before Backward, As : First, The Olfactory, Which Con Sists Of The Olfactory Bulb, And Nerve Or Commissure, Which Is Lodged In The Olfactory Fissure Upon The Orbital Surface Of ...
Cerebellum
Cerebellum. It Will Not Assist Us To The Understanding Of The Architec Ture Of The Central Nervous System To Enter Into A Minute Description Of The External Surface And Shape Of The Cere Bellum. Its External Appearance And The Divisions Of Its Sur Face Will Be Readily Understood By A ...
Dissection
Dissection. By Separating The Sides Of The Longitudinal Fissure Between The Hemispheres Of The Cerebrum, There Is Brought Into View A Broad Band Of Transverse Fibres, The Corpus Callosum, Which Connects The Hemispheres. Enclosing The Corpus Callosum Behind, Above And In Front Is A Long Continuous Con Volution, The Gyres ...
Medulla Oblongata And Spinal
The, Medulla Oblongata. And Spinal Cord. These Parts Of The Cerebro Spinal Axis Are So Intimately Associated In General Structure, And In The Continuity Of The Tracts Of Grey And White Columns Of Which They Are Consti Tuted, That It Will Be Convenient To Describe Them Together. The Medulla Oblongata ...
Recapitulation Of The Tracts
Recapitulation Of 'the Tracts Of The Cerebro Spinal Axis. In The Foregoing Pages We Have Studied The Several Parts Of The Cerebrospinal Axis In Segments, And Have Connected Each By Its Immediate Relations, And By The Continuity Of The Tracts Of Which It Is Composed. It Will Now Be Of ...
Structupe Of The Pons
Structupe Of The Pons Vaeolh :—the Several Layers Of Which The Pone Varolii Is Composed, Will Be More Easily Under Stood By Dividing It In The Median Line From Before Backward, Into Lateral Halves. After The Cerebellum Has Been Removed, If The Pons Varolii Is Torn In A Longitudinal Direction ...
Structure Of The Cerebrum
Structure Of The Cerebrum. In A General Description Of The Anatomy Of The Cerebrum, It May Be Said To Arise By Two Peduncles, The Parts Of Which Are Derived In Front From The Pons Variolii, And Behind From The Cerebellum. Each Peduncle Is About Five-eighths Of An Inch In Length, ...
System The Ventricular
The Ventricular, System, —in The Centre Of The Mass Throughout Its Whole Length Is A Cavity Or Ventricle Which Is Also Modified At Different Points Along Its Course. In The Spinal Cord It Is A Slender Canal Which, Behind The Medulla Oblongata, Con Nects With The Posterior Median Fissure By ...
Tee Thalamus
Tee Thalamus Opticus:—the Inferior Internal Ganglion, Or Thalamus Opticus, In General Outline Is Fusiform In Shape. Its Body Is Somewhat Elongated, And A Transverse Section Shows That It Is Prismatic. Its Upper Surface Is Divided Into Two Portions By An Oblique Depression Which Begins In Front Behind The Anterior Pillar ...
The Cerebro Spinal Axis
The Cerebro Spinal Axis. The Mass Of Nervous Matter Included Under This Heading Is Commonly Referred To As The Brain And Spinal Cord. The Brain Is That Portion Of It Which Is Contained Within Th:, Cranial Cavity, And The Spinal Cord Is The Part Suspended Within The Spinal Canal. In ...
The Cerebrum
The Cerebrum. Separated From The Rest Of The Mass Of The Central Ner Vous System And Viewed, The Cerebrum Is Much The Largest Part, Being About Eight Times The Weight Of The Cerebellum, And Thirty Times That Of The Spinal Cord. It Averages Seven Inches In A Longitudinal And Five ...
The Eaphe And Stele
The Eaphe And Stele Longitudinales.—in The Middle Line Upon The Upper Surface Of The Corpus Callosum Is A Slight Linear Longitudinal Depression, The Raphe, And Upon Each Side, And Parallel To It, Are Two Longitudinal White Lines, The Stria; Longitudinales, Or The Nerves Of Lancisi. The Anterior Fibres Of The ...
The External Ba Sal
The External Ba Sal Ganglion :—the Gray Matter External To The Internal Capsule, And Enclosed By Its Funnel Shaped Concavity, Is The Lenticular Ganglion, So Called Because Its Parts Are Disposed In Lenticular Layers. Its Layers Are Super Imposed And Separated From Each Other By Lamime Of White Fibres, Called ...
The Ganglionic Systeai
The: Ganglionic Systeai : The Grey.matter Of The Spinal Cord Is Dispose(' In Two Columns, One On Each Side, Enclosed By The White Matter Of The Cord. These Columns Are United By A Grey Conmaissure, Which Contains In Its Middle The Cen Tral Canal Of The Cord, And They Are ...
The Internal Basal Ganglia
The Internal Basal Ganglia :—the Internal Basal Ganglia Rest Upon And Are Attached To The Internal Surface Of The Internal Capsule. They Are Separated From Each Other By A Depression, And A Narrow Band Of White Fibres, The Tamia Semicircularis. The Superior Internal Ganglion, Or Caudate Nucleus, Rests Upon The ...
The Membranes Of The
The Membranes Of The Bra [n. The Central Nervous System, Or The Cerebro-spinal Axis, Is Contained In The Cavity Of The Cranium And Spinal Canal. This Cavity Is Lined By A Tough Fibrous Membrane, The Dura Mater, Which Is Closely Adherent To The Inner Surfaces Of The Bones Of The ...
The Pons Varolii
The Pons Varolii. The Pons \tarolii Is A. Broad And Thick Band Of Transverse Fibres Crossing In Front Of The Upper Continuation Of The Spinal Cord And The Medulla Oblongata, Interrupting The Anterior Median Fissure, And Connecting The Opposite Hemis Pheres Of The Cerebellum. It Is About One Inch And ...