ClipArt ETC
Diagram illustrating the general relationships of the parts of the brain. Labels: A, fore-brain; b, mid-brain; B, cerebellum; C, pons Varolii; D, medulla oblongata; B,c,and D together constitute the hind-brain.

Brain

Diagram illustrating the general relationships of the parts of the brain. Labels: A, fore-brain; b,…

The brain from the left side. Labels: Cb, the cerebral hemispheres forming the main bulk of the fore-brain; Cbl, the cerebellum; Mo, the medulla oblongata; P, the pons Varolii; *, the fissure of Sylvius.

Brain

The brain from the left side. Labels: Cb, the cerebral hemispheres forming the main bulk of the fore-brain;…

Anterior view of the brain and spinal marrow. Labels: 1, 1, hemispheres of the cerebrum; 2, great middle fissure; 3, cerebellum; 4, olfactory nerves; 5, optic nerves; 6, corpora albicantia; 7, motor oculi nerves; 8, pons Varolii; 9, fourth pair of nerves; 10, lower portion of the medulla oblongata; 11, 11, medulla spinalis in its whole length; 12, 1, spinal nerves; 13, cauda equina.

Brain and Spinal Cord

Anterior view of the brain and spinal marrow. Labels: 1, 1, hemispheres of the cerebrum; 2, great middle…

The brain and spinal cord. Labels: 1, 1, hemispheres of cerebrum; 2, great middle fissure; 3, cerebellum; 4, olfactory nerves; 5, optic nerves; 6, corpora albicanlia; 7, motor oculi; 8, pons Varolii; 9, fourth nerve; 10, medulla oblongata; 11, 11, medulla spinalis; 12, 12, spinal nerves; 18, cauda equina.

Brain and Spinal Cord

The brain and spinal cord. Labels: 1, 1, hemispheres of cerebrum; 2, great middle fissure; 3, cerebellum;…

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.

The base of the brain. Labels: 1, longitudinal fissure; 2, 2, anterior lobes of cerebrum; 3, olfactory bulb; 7, optic commissure; 9, 3rd nerve, ; 11, 4th nerve; 13, 5th nerve; 14, crura cerebri, 15, 6th nerve; 16, pons Varolii; 17, 7th nerve; 19, 8th nerve; 20, medulla oblongata; 21, 9th nerve, 23, 10th nerve; 25, 11th nerve; 27, 12th nerve; 28, 29, 30, 31, 32, cerebellum.

Base of Brain

The base of the brain. Labels: 1, longitudinal fissure; 2, 2, anterior lobes of cerebrum; 3, olfactory…

Fourth ventricle with the medulla oblongata and the corpora quadrigemina. The roman numbers indicate superficial origins of the cranial nerves, while the other numbers indicate their deep origins, or the position of their central nuclei. 8, 8', 8", auditory nuclei nerves; t, funiculus teres; A, B, corpora quadrigemina; c.g, corpus geniculatum; p, c, pedunculus cerebri; m, c, p, middle cerebellar peduncle; s, c, p, superior cerebellar peduncle; i, c, p, inferior cerebellar peduncle; l, c, locus caeruleus; e, t, eminentia teres; a, c, ala cinerea; a, n, accessory nucleus; o, obex; c, clava; f, c, funiculus cuneatus; f, g, funiculus gracilis.

Fourth Ventricle with the Medulla Oblongata and the Corpora Quadrigemina

Fourth ventricle with the medulla oblongata and the corpora quadrigemina. The roman numbers indicate…

The medulla oblongata (brain stem).

The Medulla Oblongata

The medulla oblongata (brain stem).

Back view of the medulla, pons, and mesencephalon of a full term human fetus.

Back View of Medulla, Pons, and Mesencephalon

Back view of the medulla, pons, and mesencephalon of a full term human fetus.

Front view of the medulla, pons, and mesencephalon of a full term human fetus.

Front view of Medulla, Pons, and Mesencephalon

Front view of the medulla, pons, and mesencephalon of a full term human fetus.

Lateral view of the medulla, pons, and mesencephalon of a full term human fetus.

Lateral View of Medulla, Pons, and Mesencephalon

Lateral view of the medulla, pons, and mesencephalon of a full term human fetus.

Diagram of a longitudinal section through the pons, showing the relation of the nuclei for the ocular muscles. CQ, corpora quadrigemina; 3, third nerve; II I, its nucleus; 4, forth nerve; IV, its nucleus, the posterior part of the third; 6, sixth nerve. The probable position of the center and nerve fibers for accommodation is show at a and a' for the reflex action of iris, at b, and b'; for the external rectus muscles, at c, c'. The lines beneath the floor of the forth ventricle indicate fibers, which connect the nuclei.

Pons

Diagram of a longitudinal section through the pons, showing the relation of the nuclei for the ocular…

"A bridge. As the rivers of Greece were small, and the use of the arch known to them only to a limited extent, it is probable that the Greek bridges were built entirely of wood, or, at best, were nothing more than a wooden platform supported upon stone piers at each extremity. Pliny mentions a bridge over the Acheron 1000 feet in length; and also says that the island Euboea was joined to Boeotia by a bridge; but it is probably that both these works were executed after the Roman conquest. The Romans were the first people who applied the arch to the construction of bridges, by which they were enabled to erect structures of great beauty and solidity, as well as utility. The width of the passage-way in a roman bridge was commonly narrow, as compared with modern structures of the same kind, and corresponded with the road leading to and from it. It was divided into three parts. the centre one, for horses and carriages, was denominated agger or iter; and the raised foot paths on each side decursoria, which were enclosed by parapet walls similar in use and appearance to the pluteus in the basilica." — Smith, 1873

Pons Aelius

"A bridge. As the rivers of Greece were small, and the use of the arch known to them only to a limited…

"A bridge. As the rivers of Greece were small, and the use of the arch known to them only to a limited extent, it is probable that the Greek bridges were built entirely of wood, or, at best, were nothing more than a wooden platform supported upon stone piers at each extremity. Pliny mentions a bridge over the Acheron 1000 feet in length; and also says that the island Euboea was joined to Boeotia by a bridge; but it is probably that both these works were executed after the Roman conquest. The Romans were the first people who applied the arch to the construction of bridges, by which they were enabled to erect structures of great beauty and solidity, as well as utility. The width of the passage-way in a roman bridge was commonly narrow, as compared with modern structures of the same kind, and corresponded with the road leading to and from it. It was divided into three parts. the centre one, for horses and carriages, was denominated agger or iter; and the raised foot paths on each side decursoria, which were enclosed by parapet walls similar in use and appearance to the pluteus in the basilica." — Smith, 1873

Pons Ariminum

"A bridge. As the rivers of Greece were small, and the use of the arch known to them only to a limited…

"A bridge. As the rivers of Greece were small, and the use of the arch known to them only to a limited extent, it is probable that the Greek bridges were built entirely of wood, or, at best, were nothing more than a wooden platform supported upon stone piers at each extremity. Pliny mentions a bridge over the Acheron 1000 feet in length; and also says that the island Euboea was joined to Boeotia by a bridge; but it is probably that both these works were executed after the Roman conquest. The Romans were the first people who applied the arch to the construction of bridges, by which they were enabled to erect structures of great beauty and solidity, as well as utility. The width of the passage-way in a roman bridge was commonly narrow, as compared with modern structures of the same kind, and corresponded with the road leading to and from it. It was divided into three parts. the centre one, for horses and carriages, was denominated agger or iter; and the raised foot paths on each side decursoria, which were enclosed by parapet walls similar in use and appearance to the pluteus in the basilica." — Smith, 1873

Pons Cestius

"A bridge. As the rivers of Greece were small, and the use of the arch known to them only to a limited…

"A bridge. As the rivers of Greece were small, and the use of the arch known to them only to a limited extent, it is probable that the Greek bridges were built entirely of wood, or, at best, were nothing more than a wooden platform supported upon stone piers at each extremity. Pliny mentions a bridge over the Acheron 1000 feet in length; and also says that the island Euboea was joined to Boeotia by a bridge; but it is probably that both these works were executed after the Roman conquest. The Romans were the first people who applied the arch to the construction of bridges, by which they were enabled to erect structures of great beauty and solidity, as well as utility. The width of the passage-way in a roman bridge was commonly narrow, as compared with modern structures of the same kind, and corresponded with the road leading to and from it. It was divided into three parts. the centre one, for horses and carriages, was denominated agger or iter; and the raised foot paths on each side decursoria, which were enclosed by parapet walls similar in use and appearance to the pluteus in the basilica." — Smith, 1873

Pons Trajan

"A bridge. As the rivers of Greece were small, and the use of the arch known to them only to a limited…

Section across the pons, about the middle of fourth ventricle. py., pyramidal bundles; po., transverse fibers passing po1, behind, po2, in front of py.; r., raphe; o.s., superior olive; a.V., bundles of ascending root of V. nerve enclosed in a prolongation of the substance of Rolando; VI., the sixth nerve, nVI., its nucleus; VII., facial nerve; VIII., auditory nerve, n.VIII., lateral nucleus of the auditory.

Section across the Pons

Section across the pons, about the middle of fourth ventricle. py., pyramidal bundles; po., transverse…

The pons is composed chiefly of transverse fibers arranged in coarse bundles, longitudinal fibers gathered in compact bundles, and diffusely scattered masses of gray substance among the fiber bundles, the nuclei pontis. Shown is a section of the pons at its middle, showing trapezoid body.

Section of the Pons

The pons is composed chiefly of transverse fibers arranged in coarse bundles, longitudinal fibers gathered…

The pons is composed chiefly of transverse fibers arranged in coarse bundles, longitudinal fibers gathered in compact bundles, and diffusely scattered masses of gray substance among the fiber bundles, the nuclei pontis. Shown is a section of the pons near its junction with the midbrain.

Section of the Pons

The pons is composed chiefly of transverse fibers arranged in coarse bundles, longitudinal fibers gathered…