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In birds the hemispheres are not united as in humans; the cerebellum is proportionately larger than the medulla oblongata, and the comparative weight of the brain to the body is less than in mammals. Labels: 1, Cerebrum. 2, Optic ganglion. 3, Cerebellum. 4, Medulla oblongata.

Brain of a Bird

In birds the hemispheres are not united as in humans; the cerebellum is proportionately larger than…

Location of the motor areas in the brain of a chimpanzee. The extent of the motor area is indicated by stippling; it lies entirely in from of the fissure of Rolando (sulcus centralis). Much of the motor area is hidden in the sulci. The regions marked eyes indicated the area whose stimulation gives conjugate movements of the eyeballs. It is doubtful however, whether these represent motor areas proper.

Motor Area of the Brain of a Chimpanzee

Location of the motor areas in the brain of a chimpanzee. The extent of the motor area is indicated…

Brain of dog, viewed from above and in profile. F, frontal fissure sometimes termed crucial sulcus, corresponding to the fissure of Rolando in man. S, fissure of Sylvius, around which the four longitudinal convolutions are concentrically arranged; 1, flexion of head on the neck, in the median line; 2, flexion of head on the anterior limb; 5, 6, flexion and extension of posterior limb; 7, 8, 9, contraction of orbicularis oculi, and the facial muscles in general. The unshaded part in that exposed by the opening of the skull.

Brain of a Dog

Brain of dog, viewed from above and in profile. F, frontal fissure sometimes termed crucial sulcus,…

The brain of fish are small, it does not fill the whole cranial cavity, there being found within it a spongy fatty mass. Labels: 1, Olfactory ganglions. 2, Cerebrum. 3, Optic ganglions 4, Cerebellum. 5, Medulla Oblongata and Spinal Cord.

Brain of a Fish

The brain of fish are small, it does not fill the whole cranial cavity, there being found within it…

The base of brain of a horse. Labels: l, Cerebrum. 2, Ganglion of sight. 3, Cerebellum. 4, Medulla Oblongata and Spinal Cord.

Base of Brain of a Horse

The base of brain of a horse. Labels: l, Cerebrum. 2, Ganglion of sight. 3, Cerebellum. 4, Medulla Oblongata…

Diagrams of monkey's brain to show the effects of electric stimulation of certain spots. Labels: 1. causes movement of supination and flexion of forearm; 7, elevation of the upper lip; 8, conjoint action of elevation of upper lip and depression of lower; 9, opening mouth and protrusion of tongue; 10, retraction of tongue; 11, action of platysma; 12, elevation of eyebrows and eyelids, dilation of pupils, and turning head to opposite side and upwards, with usually contraction of the pupils; 13', similar action, but eyes usually directed downwards; 14, retraction of opposite ear, head turn to the opposite side, the eyes widely opened, and pupils dilated; 15, stimulation of this regions, which corresponds to the tip of the uncinate convolution, caused torsion of the lip and nostril of the same side.

Brain of a Monkey to Show effects of Electric Stimulation

Diagrams of monkey's brain to show the effects of electric stimulation of certain spots. Labels: 1.…

In Amphibians the nervous system is but slightly developed. The cerebrum is small; the cerebellum is scarcely visible. Shown is the brain of an alligator. Labels: 1, Olfactory ganglions. 2, Cerebrum. 3, Optic ganglions. 4, Cerebellum. 5, Medulla Oblongata and Spinal Cord.

Brain of an Alligator

In Amphibians the nervous system is but slightly developed. The cerebrum is small; the cerebellum is…

The brain of a human embryo in the fifth week. A, Brain as seen in profile. B, Mesial section through the same brain. Labels: M, mammillary eminence, Tc, tuber cinereum; Hp, Hypophysis (pituitary diverticulum from buccal cavity); Opt, optic stalk; TH, optic thalamus; Tg, tegmental part of mesencephalon; Ps, pars subtalamica; Cs, corpus striatum; FM, foramen of Monro; L, lamina terminalis; RO, recessus opticus; RI, recessus infundibuli.

Brain of Embryo

The brain of a human embryo in the fifth week. A, Brain as seen in profile. B, Mesial section through…

The left cerebral hemisphere, from a fetus in the early part of the seventh month of development. Labels: p.c.s., sulcus praecentralis superior; p.c.i., sulcus praecentralis inferior; r1, lower part of Rolandic fissure; r2, upper part of Rolandic fissure; p1, inferior postcentral sulcus; p3, ramus horizontalis; p4, ramus occipitalis; e.p., external perpendicular fissure; t1, parallel sulcus; S, Sylian fossa; F.P., fronto-parietal wall; F.,frontal wall, O., orbital wall.

Brain of Fetus

The left cerebral hemisphere, from a fetus in the early part of the seventh month of development. Labels:…

Brain of Petromyzon marinus (sea lamprey),dorsal view.

Brain of Sea Lamprey

Brain of Petromyzon marinus (sea lamprey),dorsal view.

Schema showing the connections of the several parts of the brain.

Connection of the Brain Parts

Schema showing the connections of the several parts of the brain.

Labels: 1, longitudinal fissure separating the hemispheres; 2, frontal lobes of the cerebrum; 3, posterior lobes.

Brain Seen from Above

Labels: 1, longitudinal fissure separating the hemispheres; 2, frontal lobes of the cerebrum; 3, posterior…

Labels: 1, longitudinal fissure separating the hemispheres; 2 and 3, front and posterior lobes of the cerebrum; 4 cerebellum; 7, optic nerve; 8, olfactory nerve; 9, medulla.

Brain Seen from Below

Labels: 1, longitudinal fissure separating the hemispheres; 2 and 3, front and posterior lobes of the…

Diagram to show the connecting of the Frontal Occipital Lobes with the Cerebellum. The dotted lines passing in the crusta, outside the motor fibers, indicate the connection between the temporo-occipital lobe and the cerebellum. F.C., the fronto-cerebellar fibers, which pass internally to the motor tract in the crusta; I.F., fibers from the caudate nucleus to the pons. FR., frontal lobe; Oc, occipital lobe; AF. ascending frontal; AP., ascending frontal convolution; FR., fissure of Rolando; IPF., interparietal fissure, a section of crus is lettered on the left side. SN., substantia nigra; PY. pyramidal motor fiber, which on the right is shown as continuous lines converging to pass through the posterior limb of IC. internal capsule ( the knee or elbow of which is shown thus) upwards into the hemisphere and downwards through the pons to cross at the medulla in the anterior pyramids.

Brain Showing Connection of Frontal Occipital Lobe with Cerebellum

Diagram to show the connecting of the Frontal Occipital Lobes with the Cerebellum. The dotted lines…

Shown is the corpus callosum. The corpus callosum is a thick stratum of transversely directed nerve fibers, by which almost every part of one cerebral hemisphere is connected with the corresponding part of the other cerebral hemisphere.

Brain Showing Corpus Callosum

Shown is the corpus callosum. The corpus callosum is a thick stratum of transversely directed nerve…

Simplified drawing of brain as seen from below, showing relations of brain stem to spinal cord and cerebrum.

Relation of Brain Stem to Spinal Cord

Simplified drawing of brain as seen from below, showing relations of brain stem to spinal cord and cerebrum.

The cerebral hemispheres viewed from above.

Brain Viewed From Above

The cerebral hemispheres viewed from above.

The brain viewed from above. Labels: 1, occipital convolution; 2, occipital lobe; 3, inner parietal convolution; 4, left cerebral hemisphere; 5, inner frontal convolution; 6, right cerebral hemisphere; 7, frontal lobe; 8, longitudinal fissure; 9, median frontal convolution; 10, occipital center convolution; 11, frontal center convolution; 12, outer frontal convolution; 13, outer parietal convolution; 14, median parietal convolution.

Brain Viewed from Above

The brain viewed from above. Labels: 1, occipital convolution; 2, occipital lobe; 3, inner parietal…

Lateral view of a brain hemisphere; cortical area V, damage to which produces "mind blindness" (word blindness); cortical area H, damage to which produced "mind deafness" (word deafness); cortical area S, damage to which caused the loss of audible speech; cortical area W, damage to which abolished the power of writing.

Association Area of the Brain

Lateral view of a brain hemisphere; cortical area V, damage to which produces "mind blindness" (word…

The base of the brain. The cerebral hemispheres are seen overlapping all the rest. Labels: I, olfactory lobes; II, optic tract passing to the optic commissure from which the optic nerves proceed; III, the third nerve or motor oculi; IV, the fourth nerve or patheticus; V, the fifth nerve or trigeminalis; VI, the sixth nerve or abducens; VII, the seventh or facial nerve or portio dura; VIII, the auditory nerve or portio mollis; IX, the ninth or glosso-pharyngeal; X, the tenth or pneumogastric or vagus; XI, the spinal accessory; XII, the hypoglassal; ncI, the first cervical spinal nerve.

The Base of the Brain

The base of the brain. The cerebral hemispheres are seen overlapping all the rest. Labels: I, olfactory…

Base of the Brain. Labels: 1,2, longitudinal fissure; 3, anterior lobes cerebrum; 4, middle lobe; 5, fissure Sylvius; 6, posterior lobe; 7, infundibulum; 8, its body; 9, corporo albicantia; 10, cineritious matter; 11, crura cerebri; 12, pons Varolii; 13, medulla oblongata; 14, posterior prolongation of pons; 15, middle of cerebellum; 16, anterior part of cerebellum; 17, its posterior part and fissure; 18, medulla spinalis; 19, middle fissure medulla; 20, pyramidal body; 21, retiform body; 22, olivary body; 23, olfactory nerve; 24, its bulb; 25, its external root; 26, middle root; 27, internal root; 28, 29, optic nerve; 30, third nerve; 31, fourth nerve; 32, fifth nerve; 33, sixth nerve; 34, facial nerve; 35, auditory nerve; 36, 37, 38, eighth nerve.

Base of the Brain

Base of the Brain. Labels: 1,2, longitudinal fissure; 3, anterior lobes cerebrum; 4, middle lobe; 5,…

The base of the brain. Labels: 1, eleventh or spinal accessory nerve; 2, right hemisphere of cerebellum; 3, twelfth or hypoglossal nerve; 4, ninth or glosso-pharyngeal nerve; 5, eighth or auditory nerve; 6, seventh or facial nerve; 7, medulla oblongata; 8, fifth or trigemenus; 9, central lobe; 10, fourth or trochlear nerve; 11, sixth or abduceus nerve; 12, pons varolii; 13, right frontal lobe of the cerebrum; 14, lobes of the medulla; 15, optic chiasm; 16, second or optic nerve; 17, left frontal lobe; 18, first or olfactory nerve; 19, sylvian fissure; 20, third or oculamotor nerve; 21, tenth or pneumogastric nerve; 22, left hemisphere of the Cerebellum.

Base of Brain

The base of the brain. Labels: 1, eleventh or spinal accessory nerve; 2, right hemisphere of cerebellum;…

<em>A</em>, anterior lobe of the cerebellum; <em>B</em>, olfactory nerve; <em>C</em>, portion of the posterior lobe; <em>D</em>, optic chiasm; <em>E</em>, optic tract; <em>H, M,</em> hemispheres of the cerebellum; <em>K</em>, portion of the occipital lobe; <em>N</em>, medulla oblongata; <em>R</em>, pons Varolii."

Base of the brain

A, anterior lobe of the cerebellum; B, olfactory nerve; C, portion of the…

The base of the brain. The under part of the left temporal and occipital lobes has been sliced off so as to open into the lateral ventricle. The left hemisphere of the cerebellum has also been removed.

Base of the Brain

The base of the brain. The under part of the left temporal and occipital lobes has been sliced off so…

"Arteries and their Branches at the Base of the Brain." &mdash; Blaisedell, 1904

Blood vessels of the brain

"Arteries and their Branches at the Base of the Brain." — Blaisedell, 1904

Vertical section of dog's cerebellum. Labels: p m, pia mater; p, corpuscles of Purkinje, which are branched nerve cells lying in a single layer and sending single processed downwards and more numerous ones upwards, which branch continuously and extend through the deep "molecular layer" towards the free surface; g, dense layer of ganglionic corpuscles., closely resembling nuclear layers of retina; f, layer of nerve fibers, with a few scattered ganglionic corpuscles. This last layer (f) constitutes part of the white matter of the cerebellum, while the layer between it and the free surface are gray matter.

Cerebellum of Dog's Brain

Vertical section of dog's cerebellum. Labels: p m, pia mater; p, corpuscles of Purkinje, which are branched…

Outline sketch of a section of the cerebellum, showing the corpus dentatum. The section has been carried through the left lateral part of the pons, so as to divide the superior peduncle and pass nearly through the middle of the left cerebellar hemisphere. The olivary body has also been divided longitudinally so as to expose in section its corpus dentatum. c r, crus cerebri; f, fillet; q, corpora quadrigemina; s p, superior peduncle of the cerebellum divided; m p, middle peduncle or lateral part of the pons Varolii, with fibers passing from it into the white stem; a v, continuation of the white stem radiating towards the arbor vitae of the folia; c d, corpus dentatum; o, olivary body with its corpus dentatum; p, anterior pyramid.

The Cerebellum of the Brain

Outline sketch of a section of the cerebellum, showing the corpus dentatum. The section has been carried…

Vertical section through the cerebrum and basic ganglia to show the relation of the latter. Labels: co, cerebral convolutions; c, corpus callosum; v.l., lateral ventricle; f, fornix; vIII., third ventricle; n.c., caudate nucleus; th, optic thalamus; n.l., lenticular nucleus; c.i., internal capsule; c.l., claustrum; c.e., external capsule; m, corpus mammillare; t.o., optic tract; s.t.t., stria terminalis; n.a., nucleus amygdala; cm, soft commissure.

The Cerebrum and Basic Ganglia of the Brain

Vertical section through the cerebrum and basic ganglia to show the relation of the latter. Labels:…

The cerebellum in section and fourth ventricle, with the neighboring parts. Labels: 1, median groove of fourth ventricle, ending below in the calamus scriptorius, with the longitudinal eminence formed by the fasciculi teretes, one on each side; 2, the same groove, at the place where the white streaks of th auditory nerve emerge from it to cross the floor of the ventricle; 3, in inferior crus or peduncle of the cerebellum, formed by the restiform body; 4, posterior pyramid; above this is the calamus scriptorius; 5, superior crus of cerebellum, or processus e cerebello ad cerebrum( or ad testes); 6, fillet to the side of the crura cerebri; 7, lateral grooves of the crura cerebri; 8, corpora quadrigemina.

The Cerebrum and Fourth Ventricle of the Brain

The cerebellum in section and fourth ventricle, with the neighboring parts. Labels: 1, median groove…

Cross-section of the brain. Here the upper half of the brain is cut off, and you see the upper cut surface of the lower half. The outer shaded part is the gray matter, and the inner lighter area is the white matter. In the center is the corpus callosum, a type of white matter that connects the two hemispheres together.

Cross-Section of the Brain

Cross-section of the brain. Here the upper half of the brain is cut off, and you see the upper cut surface…

Two stages in the development of the human brain. A. Brain of an human embryo of the third week. B. Brain of an embryo of five weeks.

Development of Human Brain

Two stages in the development of the human brain. A. Brain of an human embryo of the third week. B.…

Early stages in development of human brain. 1, 2, 3, are from an embryo about seven weeks old; 4, about three months old. m, middle cerebral vesicle (mesencephalon); c, cerebellum; m o, medulla oblongata; i, thalamencephalon; h, hemispheres; i', infundibulum; Fig. 3 shows the several curves which occur in the course of development; Fig. 4 is a lateral view, showing the great enlargement of the cerebral hemispheres which have covered in the thalami, leaving the optic lobes, m, uncovered.

Development of the Brain

Early stages in development of human brain. 1, 2, 3, are from an embryo about seven weeks old; 4, about…

Dissection of the brain showing basal ganglia, third ventricle and adjacent structures viewed from above.

Dissection of the Brain

Dissection of the brain showing basal ganglia, third ventricle and adjacent structures viewed from above.

Gyri and sulci, on the outer surface of the cerebral hemisphere. Labels: f1, sulcus frontalis superior; f2, sulcus frontalis inferior; f.m., sulcus frontalis medius; p.m., sulcus paramedialis; A, pars basilaris; B, pars triangularis; C, pars orbitalis; S, Sylvian fissure; s1, anterior horizontal limb (Sylvian fissure); s2, posterior horizontal limb (Sylvian fissure); p.c.i., inferior praecentral sulcus; p.c.s., superior praecentral sulcus; r, fissure of Rolando; g.s., superior genu; g.i., inferior genu; d, sulcus diagonalis; t1, superior temporal sulcus (parallel); t2, inferior temporal sulcus; p1, inferior postcentral sulcus; p2. superior postcentral sulcus; p3, ramus horizontalis; p4, ramus occipitalis; s.o.t., sulcus occipitalis transversus; c.m., callosomarginal sulcus; c.t.r., inferior transverse furrow.

Gyri and Sulci on the Brain

Gyri and sulci, on the outer surface of the cerebral hemisphere. Labels: f1, sulcus frontalis superior;…

The gyri and sulci on the mesial aspect of the cerebral hemisphere. Labels: r, fissure of Rolando; r.o, rostral sulcus; i.t, incisura temporalis.

Gyri and Sulci on the Brain

The gyri and sulci on the mesial aspect of the cerebral hemisphere. Labels: r, fissure of Rolando; r.o,…

The gyri and sulci on the tentorial and orbital aspects of the cerebral hemispheres.

Gyri and Sulci on the Brain

The gyri and sulci on the tentorial and orbital aspects of the cerebral hemispheres.

Diagrammatic horizontal section of a vertebrate brain. Mb, midbrain: what lies in front of this is the fore-, and what lies behind, the hindbrain; Lt, lamina terminalis; Olf, olfactory lobes; Hmp, hemispheres; Th. E, thalamencephalon; Pn, pineal gland; Py, pituitary body; F. M., foramen of Munro; cs, corpus striatum; Th, optic thalamus; CC, crura cerebri; the mass lying above the canal represents the corpora quadrigemina; Cb, cerebellum; I-IX, the nine pairs of cranial nerves; 1, olfactory ventricle; 2, lateral ventricle; 3, third ventricle; 4, fourth ventricle; +, iter a tertio ad quartum ventriculum.

Horizontal Section of a Vertebrate Brain

Diagrammatic horizontal section of a vertebrate brain. Mb, midbrain: what lies in front of this is the…

Lateral view of the brain. F, Frontal lobe; P, Parietal lobe; O, Occipital lobe; T, Temporal lobe; S, fissure of Sylvius; S', horizontal; S", ascending ramus of the same; c, sulcus centralis (fissure of Rolando); A, ascending frontal convolutions; fr, superior, f2, inferior frontal sulcus; f3, precentral sulcus; P1, superior parietal lobule; P2, inferior parietal lobule consisting of P2, supramarginal gyrus, and P2', angular gyrus; ip, interparietal sulcus; cm, termination of callosomarginal fissure; O1, first O2, second, 03, third occipitals inferior; T1, first T2, second, T3, third temporal convolutions; tr, first , t2, second temporal fissures.

Lateral View of the Brain

Lateral view of the brain. F, Frontal lobe; P, Parietal lobe; O, Occipital lobe; T, Temporal lobe; S,…

"<em>A</em>,frontal love of the cerebrum; <em>B</em>, parietal lobe; <em>C</em>, parieto-occipital lobe; <em>D</em>, occcipital lobe; <em>E</em>, cerebellum; <em>F</em>; arbor vitae; <em>H</em>, pons Varolii; <em>K</em>, medulla oblongata." — Blaisedell, 1904

Left Half of the Brain

"A,frontal love of the cerebrum; B, parietal lobe; C, parieto-occipital lobe;…

The lobes of the convex surface of the hemisphere.

Lobes of the Brain

The lobes of the convex surface of the hemisphere.

Diagram to indicate position of centers on the external surface of the brain.

Motor Centers of the Brain

Diagram to indicate position of centers on the external surface of the brain.

Diagram to show the relative position of several motor tracts in their course from the cortex to the crus. The section through the convolutions is vertical; that through the internal capsule, I, C, horizontal; that through the crus again vertical. C, N, caudate nucleus; O, H, optic thalamus; L2 and L3, middle and outer part of lenticular nucleus; f, a, l, face, arm, and leg fibers. The words in italic indicate corresponding cortical centers.

Motor Tracts of the Brain

Diagram to show the relative position of several motor tracts in their course from the cortex to the…

"Wherever nerve cells are abundant, the nerve tissue has a gray color; in other places, it looks white. Most of the gray matter of the brain is on the surface." — Blaisedell, 1904

Nerve Cells of the Brain

"Wherever nerve cells are abundant, the nerve tissue has a gray color; in other places, it looks white.…

Brain of the Orangoutang, showing arrangement of the convolutions. Sy, fissure of Sylvius; R, fissure of Rolando; E P, external perpendicular fissure; Olf, olfactory lobe; Cb, cerebellum; PV, pons Varolii; MO, medulla oblongata. As contrasted with the human brain, the frontal lobe is short and small relatively, the fissure of Sylvius is oblique, the temporo-sphenoidal lobe very prominent, and the external perpendicular fissure very well marked.

Brain of the Orangutan

Brain of the Orangoutang, showing arrangement of the convolutions. Sy, fissure of Sylvius; R, fissure…

The convolutionary projections of the precentral gyrus, and their relationship to motor areas.

Precentral Gyrus in the Brain

The convolutionary projections of the precentral gyrus, and their relationship to motor areas.

Showing the lines which indicate the position of the principal fissures of the brain.

Principle Fissures of the Brain

Showing the lines which indicate the position of the principal fissures of the brain.

View of the right hemisphere in the median aspect. CC, corpus callosum longitudinally divided; Gf, gyrus fornicatus; H, gyrus hippocampi; h, sulcus hippocampi; U, uncinate gyrus; cm, calloso marginal fissure; F1, median aspect of first frontal convolution; c, terminal portion of sulcus centralis (fissure of Rolando); A, ascending frontal; B, ascending parietal convolution; P1', praecuneus; Oz, cuneus; po, parieto-occipital fissure; o, sulcus occipitalis transversus; oc, calcarine fissure; oc', superior; oc", inferior ramus of the same; D, gyrus descendens; T4, gyrus occipito-temporalis lateralis (lobulus fusiformis) ; T5, gyrus occipito-temporalis medialis (lobulus lingualis).

Right Hemisphere of the Brain

View of the right hemisphere in the median aspect. CC, corpus callosum longitudinally divided; Gf, gyrus…

"The brain seen from the side, showing the three principal divisions." &mdash; Ritchie, 1918

Side view of the brain

"The brain seen from the side, showing the three principal divisions." — Ritchie, 1918

The general arrangement of the brain and attached nerves and blood vessels. At <em>a b</em> and <em>c</em> is the cerebrum; at <em>f</em> is represented the corpus callosum that joins the two hemispheres together; at d is the cerebellum; at <em>g</em> is the beginning of the optic nerves and at <em>l</em> is the olfactory nerve.

The Brain

The general arrangement of the brain and attached nerves and blood vessels. At a b and c…

View of the under surface of the brain, with the lower portion of the temporal and occipital lobes, and the cerebellum on the left side removed, to show the origins of the cranial nerves.

Under Surface of the Brain

View of the under surface of the brain, with the lower portion of the temporal and occipital lobes,…

A vertical section of the cerebrum, cerebellum, and the medulla oblongata, showing the relation of the cranial nerves at their origin. Labels: 1, The cerebrum. 2, The cerebellum with its arbor vitae represented. 3, The medulla oblongata. 4, The spinal cord. 5, The corpus callosum. 6, The first pair of nerves. 7, The second pair. 8, The eye. 9, The third pair of nerves. 10, The fourth pair. 11, The fifth pair. 12, The sixth pair. 13, The seventh pair. 14, The eighth pair. 15, The ninth pair. 16, The tenth pair. 17, The eleventh pair. 18, The twelfth pair. 19, Spinal nerves. 21, The tentorium.

Vertical Section of the Brain

A vertical section of the cerebrum, cerebellum, and the medulla oblongata, showing the relation of the…

"Brain of Carcharias. ae, nervus acousticus; b, corpus restiforme; c, cerebellum; d, lobus opticus; e, hypophysis; g, nervus opticus; h, hemisphere; i, lobus olfactorius; i', olfactory pedicle; k, nervus olfactorius; l, epiphysis; m, nervus oculo-motorius; tr, nervus trigeminus; v, nervus vagus." &mdash; Encyclopedia Britannica, 1893

Carcharias Brain

"Brain of Carcharias. ae, nervus acousticus; b, corpus restiforme; c, cerebellum; d, lobus opticus;…

"Brain and spinal cord, with the thirty-one pairs of spinal nerves." — Tracy, 1888

Central Nervous System

"Brain and spinal cord, with the thirty-one pairs of spinal nerves." — Tracy, 1888

Section through the molecular and granular layers in the long axis of a cerebellar folium. Labels: P, cell of Purkinje; GL, neuroglial cell; N, axon of a granule cell; N1, axons of granule cells in molecular layers.

Sagittal Section Through Cerebellar Folium

Section through the molecular and granular layers in the long axis of a cerebellar folium. Labels: P,…

Diagram of the cerebello olivary fibers.

Cerebello Olivary Fibers

Diagram of the cerebello olivary fibers.

"Diagram showing the position of the nervous centers in the head." &mdash; Tracy, 1888

Cerebellum

"Diagram showing the position of the nervous centers in the head." — Tracy, 1888

Showing the development of the cerebellum. A, Transverse section through the forepart of the cerebellum of a sheep embryo. B, Transverse section through the hinder part of the cerebellum of a sheep embryo. C, Cerebellum of a human fetus 17 cm long. D, Median section through cerebellum of sheep embryo 5 cm long.E, Median section through cerebellum of human fetus 17 cm long. Labels: 1, sulcus primarius; 2, sulcus above and afterwards behind the pyramid; 3, sulcus between pyramid and uvula; 4, great horizontal fissure; r.l., lateral recess ventricle IV; T, transverse groove in roof of ventricle IV.

Development of Cerebellum

Showing the development of the cerebellum. A, Transverse section through the forepart of the cerebellum…

The lower surface of the cerebellum. The tonsil on the right side has been removed so at to display more fully the inferior medullary velum and the furrowed band.

Lower Surface of Cerebellum

The lower surface of the cerebellum. The tonsil on the right side has been removed so at to display…

Sagittal section through the left lateral hemisphere of the cerebellum. Showing the "arbor vitae" and the corpus dentatum.

Sagittal Section Through Cerebellum

Sagittal section through the left lateral hemisphere of the cerebellum. Showing the "arbor vitae" and…

The upper surface of the cerebellum.

Upper Surface of Cerebellum

The upper surface of the cerebellum.