. Internal medicine; a work for the practicing physician on diagnosis and treatment, with a complete Desk index. sociated, by implication of themotor pathway, with hemiplegia of the opposite side (Webers syndrome).In the cortex there is no representation of the third nerve as a whole, butof the various movements governed by it. In traumatism of the con-vexity on one side inducing extradural hemorrhage, the pupil of this sidemay be dilated and immobile (Hutchinson pupil). Lesions, as apoplexy,affecting the motor pathway within the cerebrum often cause conjugatedeviation of the e^es, with the he
. Internal medicine; a work for the practicing physician on diagnosis and treatment, with a complete Desk index. sociated, by implication of themotor pathway, with hemiplegia of the opposite side (Webers syndrome).In the cortex there is no representation of the third nerve as a whole, butof the various movements governed by it. In traumatism of the con-vexity on one side inducing extradural hemorrhage, the pupil of this sidemay be dilated and immobile (Hutchinson pupil). Lesions, as apoplexy,affecting the motor pathway within the cerebrum often cause conjugatedeviation of the e^es, with the head ordinarily toward the side of thelesion. Finally, syphilitic disease, either gumma, meningitis, or neuritis,often selects the third nerve. The palsy of myasthenia gravis is often inthe domain of the third nerve (recurring palsy—ophthalmic migraine).Nuclear Ocular Palsies.—(See p. 719.) IV. FIFTH NERVE. The fifth or trifacial is the great nerve of common sensation for thehead. Its motor branch, for mastication, is subsidiary. The surfaces sup- Ophthalmic. Maxillary Ophthalmic ^^ A, Occipitalis Occipi-. Fig. 388.—Showing distribution of cutaneous branches of trigeminal and cervical spinal nerv-es.—Piersol. plied by its three ])ranches, namely, the ophthalmic and the superior andinferior maxillary nerves, are shown in the accompanying illustrations. 736 MEDICAL DIAGNOSIS. Supra^ —\^ ifaaaiUV Entering the cranium—the first branch by the sphenoidal fissure, thesecond by the foramen ovale, the third by the foramen rotundum—thebranches unite in the Gasserian ganglion, thence to enter the side ofthe pons, midway between its upper and lower borders. At this level,in the back of the pons is the main nucleus of the fifth, but a chain ofgray matter and connecting fibres (mid-brain root) extending alongside theaqueduct of Sylvius forms the motor root, which leaves the pons justabove the sensory root and passes under the Gasserian ganglion, and
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmedicine, bookyear192
