On Paralysis, Neuralgia, and Other Affections of the Nervous System ...

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Longmans, Green, 1864 - 236 Seiten
 

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Seite 74 - Reymond, for the motor nerves, and may be expressed thus : the motor nerves are not excited by the absolute amount or density of the current, but merely by the variations which occur in the density of the current, from one instant to the other, and the more considerable the variations in the density of the current, the greater the physiological effects. It results from this, that unstable conditions of the closed, muscular and nervous currents dependent upon derangement of the chemical and physical...
Seite 82 - Bois-Reyrnond,* who remarked that in a tetanized limb of a frog the gastrocnemian muscle became quiet as soon as the sciatic nerve was laid upon the tendon of the muscle; that is, if the inverse current proper of the muscle was made to pass through the nerve; but that the tetanus continued unchanged, when the nerve touched the flesh of the muscle, that is, when the direct current proper of the muscle traversed the nerve.
Seite 118 - ... that the fore-arm is bent upon the arm; if forcible extension of the fore-arm is attempted, the biceps offers a certain resistance to it, but no pain is experienced during the forcible extension. Stiffness is also marked in the triceps, although much less than in the biceps; it...
Seite 45 - We may further deduce, from the facts which have been detailed, that the spinal marrow, and not the cerebrum, is the special source of the power in the nerves of exciting muscular contraction, and of the irritability of the muscular fibre ; that the cerebrum is, on the contrary, the exhauster, through its acts of volition, of the muscular irritability.
Seite 66 - Faradization helps in doubtful cases to establish the diagnosis, as the excitability of the muscles is always either lost or diminished in lead palsy, whilst it is normal in spontaneous paralysis. Therefore, when the muscles of a paralytic limb move well under the influence of the electric current, we may fairly conclude that there is no lead in the system ( Althaus On Paralysis, Neuralgia, £c., p.
Seite 92 - Map 2, are immediately above an abrupt bend in the river, one at the upper and the other at the lower end of the town of Simmsport.
Seite 10 - ... effects; as it easily decomposes water and saline solutions, oxygen and acids being attracted to the positive pole, while hydrogen and alkalies accumulate at the negative pole. Induction currents, on the contrary, are of instantaneous duration, move alternately in contrary directions, and have therefore only a slight chemical action ; for, as each wire serves alternately as positive and negative pole, their chemical effects are, in a great measure, neutralized as soon as produced. As regards...
Seite 68 - If the excitability of the muscles be nearly or totally lost, we have in all probability either lead-palsy or traumatic paralysis; but it must be kept in mind that certain hysterical and rheumatic palsies of long standing present the same peculiarity; and that it also may be found in cases of disease of the brain and the cord. 3. If paralyzed muscles respond readily to the electric current, there is no lead in the system, nor is the...
Seite 145 - timbre" of the voice was totally lost in all cases, but most of the patients were able to whisper by movements of the lips and tongue. Such whispering was quite distinct in some patients, but hardly intelligible in others, two of which were observed in King's College Hospital, under the care of Dr. Todd, another in the Samaritan Free Hospital, under the care of Dr. Savage. A sore ... feeling in the throat was complained of by all the patients ; four of them also felt pain in the chest, and in the...
Seite 27 - ... expensive apparatus is required for its use, and that the wires when rendered incandescent, may melt, especially if they come in contact with bones or cartilages. The galvanic cautery is chiefly applicable in the following conditions...

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