Concussion (trauma)

“ Lacerated wounds as a rule bleed less freely than those which are incised. Symptoms of concussion would favour the theory of the injury having been inflicted by a heavy instrument. Again, it is often difficult to decide whether the injury which caused death was the result of a blow or a fall. A heavy blow with a stick may at once cause fatal effusion of blood, but this might equally result from fracture of the skull resulting from a fall. ”

“ Concussion induces affections of the brain and of its membranes of an equally serious nature, at a more distant period of time, when the stage of stupefaction and insensibility is wanting; it is to guard against such an occurrence that persons who suffer from falls or severe blows on the head usually lose blood. ”

“ The different points of practice which have been noticed are well illustrated by the following case, in which the symptoms of concussion were complicated by those which are commonly observed in compression of the brain:—
An old man, when cleaning windows, fell from some steps on his forehead, which he slightly cut and bruised, the left temporal artery being divided by another small cut: it bled profusely until the hemorrhage was arrested by a surgeon. ”

“ In the present state of our knowledge respecting concussion or cerebral shock it may, I think, be accepted (1) that concussion is dependent on an acute inhibition or paralysis of the vaso-motor centre; (2) that the milder cases are unassociated with any pathological visible changes; (3) that the prolongation and severity of the depression stage are directly proportionate to the extent of the brain lesion, such lesions varying from œdema and contusion to extensive hæmorrhages and lacerations. ”

“ Concussion of the brain may arise from falls on the nates, or from blows on the head. The face becomes pale, the pupils contracted, the pulse weak and small, the extremities cold, the respiration scarcely perceptible, and the sphincters relaxed. The tendency to death is from syncope. Reaction may then occur: the pulse quickens; the skin is hot and dry; there is great confusion of thought, from which the patient ultimately recovers; vomiting is present in most cases. Concussion often passes into compression, due to hæmorrhage from the lacerated cerebral vessels. ”

“ When the fracture is associated with severe concussion. In the event of persistence of concussion symptoms of a severe type the prognosis is decidedly unfavourable. This prolongation of cerebral shock is undoubtedly dependent in its persistence on severe vaso-motor depression, and in the majority of cases ending unfavourably it will be found that the brain is generally œdematous and regionally contused or lacerated. ”

“ In severe concussion a far more highly destructive action is exerted. This condition may be followed by complete disorganisation of the cord, accompanied or not by multiple parenchymatous hæmorrhages into its substance. Either or both of these pathological conditions are produced by the impact of the bullet with the spine, given a sufficiently high degree of velocity, and it is difficult to separate clinically the resulting symptoms. ”

“ In slight concussion the usually transient effects of the [Pg 320] injury, and its happy tendency not to destroy life, place us in a state of uncertainty as to the occurrence of anatomical changes, since no opportunity of post-mortem examination occurred. The clinical condition included under this term corresponds with that implied in 'spinal concussion' in civil practice. ”

“ Symptoms of nerve lesion.—These differed little in character from those common to such injuries in civil practice, except in the relative frequency with which they assumed a serious aspect. After all in civil practice nerve concussion is most familiar to us in the degree common after knocking the elbow against a hard object, and the same may be said in regard to the allied injury of contusion. It is in small-calibre bullet wounds alone that the occurrence of such severe and sharply localised injury to deep parts as was observed is possible. ”

“ It is unreasonable to ask one to believe that the milder cases of concussion, cases in which the patient merely suffers from loss of consciousness for a few minutes, from which he rapidly recovers and is discharged from treatment within a few days, and from which he suffers in the future from no remote ill effects whatsoever, it is unreasonable to ask one to believe that such cases have experienced so severe a lesion as brain contusion or laceration. ”

“ The sharp discrimination of cases of concussion from those of slight medullary hæmorrhage was necessarily impossible. I think the only points of any importance in diagnosing pure concussion were the transitory nature of the symptoms, and the uniformity of recovery, without persistence of any signs of minor destructive lesion. In medullary hæmorrhage the tendency for a certain period was [Pg 336] towards increase in gravity in the signs. It goes almost without saying that the latter point was seldom accurately determined in patients struck on the field of battle ”

“ MacKelcan introduced the subject of concussion of the brain. After remarking on the several symptoms, and mentioning the other affections of the head with which concussion is apt to be confounded, Mr. M. directed the attention of the society more particularly to the treatment in the stage of collapse, adopted by Professor Andrini of Florence. ”

“ The SYMPTOMS of concussion of the brain range from a mere daze or stunning to those of deep unconsciousness. There is no paralysis of the extremities in pure cases. Often the patient is very restless, and throws his limbs about in all directions. When these are quiet there is response to irritation and electricity. ”

“ The symptoms of concussion may nevertheless continue for days, more particularly the insensibility, or that state which is approaching to it, complicating the case and embarrassing the practitioner. In a child or young person the symptoms of compression or irritation, when they appear even at a secondary period, may pass away under further moderate depletion; but in an adult any undue delay in giving the necessary relief, by the removal of the depressed portion of bone, will in general be destructive to the patient. ”

“ The analogous injuries termed generally in Chapter IX. nerve contusion, although frequently accompanied by tissue destruction, may be followed by reparative change, and are capable of complete or almost complete spontaneous recovery; while the lesions in the spinal cord are permanent, and complete recovery is only witnessed in the parts affected by the remote pressure or irritation from blood extravasation, or in those influenced by concussion. ”

“ Every one knows that the surest way to fasten the head is to knock the handle on the ground, as the concussion drives it further in; so that if the human head were carried on a straight support, similar concussions would be caused to the brain and other vital organs, to their serious if not fatal injury. Of course extra muscular strength is required to support the increase of weight caused by those curves; and this is effected by an extra stress on the muscles of the back. ”

“ If it be pricking, the Wound is deeper, but of small Moment: If it be a battering or bruising Instrument, the Wound is accompany'd with Contusion, producing a great Suppuration, besides the Concussion and Commotion of the Part, which are inseparable, and often cause very dangerous Symptoms. {151}
Inferences may be made also from the disposition of the wounded Person; for a strong robust Man may better bear the Stroke than a weak one ”

“ Thus we see that the cord is much more securely protected from the effects of external violence than the brain, and we can understand that there is reason for the doubt of the sceptics as to the frequency of the injury described as concussion of the spine. ”

“ The person may die from the concussion, or he may slowly or quickly recover. The insensibility may be for a time complete . The pulse may be small, quick and imperceptible, and, no blood being pumped up by the enfeebled heart, the face will be pale and the surface of the body cold. ”

“ It has, however, been demonstrated that a slighter injury of the kind, giving rise to long-continued symptoms, need not necessarily be fatal; in which case it is supposed that the cure is effected by adhesion, and not by granulation accompanied by the secretion of purulent matter.
247. When a concussion of the brain has rendered the sufferer insensible and motionless, the countenance is deadly pale, (the reverse of what takes place in sanguineous apoplexy;) the pulse is not discoverable: the man does not appear to breathe. ”

“ Experience of the character of the lesions observed after severe concussion by the ordinarily somewhat coarser forms of violence common to civil life, fully explains the severity of the damage to the brain tissue met with in injuries due to bullets of small calibre. Viewing the elaborate arrangements which exist for the preservation of the central nervous system from the moderate vibration incidental to ordinary existence, it is easy to appreciate the harmfulness of such exquisite vibratory force as that transmitted by a bullet of small calibre travelling at a high rate of velocity. ”

“ The touch could not but have been slight, but to me the concussion was dreadful, and almost made me scream with the surprise and pain; the sensation being very similar to that which a heavy person feels on touching the ground, when he has jumped from a higher place than he ought. ”

“ A certain length of the affected nerve is apparently completely destroyed as a conductor of impulses, the connective-tissue element alone remaining intact. Under these circumstances a nerve, the subject of the most serious degree of vibratory concussion, which, if cut down upon, may exhibit no macroscopic change, may take a longer period to recover than one in which the presence of considerable local thickening points to direct contact with the bullet, with resulting hæmorrhage into the nerve sheath and perhaps partial gross rupture of nerve fibres. ”

“ The reaction from what may be called pure concussion is generally slow. The patient is apt to be dazed for some time, although the pulse and temperature may be normal. When there is a rebound with fever, and florid complexion, and suddenly or gradually another but deeper unconsciousness supervenes, it is almost certain that positive lesion took place at the time of injury, and that the reaction has brought with it great congestion if not extravasation. ”

“ The causation of concussion is, however, materially influenced in its degree by the velocity of flight of the bullet and consequent severity of the vibratory force exerted. Hence actual contact of the bullet with the nerves is not necessary for its production, as is seen in the temporary complete loss of functional capacity in the limbs in many cases of fracture, where the vibrations are rendered still more far-reaching and effective as the result of their wider distribution from the larger solid resistance afforded by the bone. ”

“ Pathology.—Concussion produces laceration of the brain, or at least a jarring of the nervous elements, which, if not sufficiently severe to produce sudden death, may lead to softening or inflammation, with their respective symptoms of functional derangement. ”

“ As the brain is overcharged with blood, the vessels pressing on that part are very liable to burst, from the least accidental concussion; and the unfortunate victim of such folly may expire, while he remains insensible of his danger. ”

“ In no form of spinal injury is this less often indicated, or less likely to be useful. It is useless in the cases of severe concussion, contusion, or medullary hæmorrhage which form such a very large proportion of those exhibiting total tranverse lesion, and equally unsuited to cases of partial lesion of the same character. Extra-medullary hæmorrhage can rarely be extensive enough to produce signs calling for the mechanical relief of pressure; the section of the cord cannot be remedied. ”

“ In general, the existence of concussion is more often overlooked than the coexisting alcoholism, so that if there is any doubt in a given case it should be treated as one of cerebral injury. The injury which causes the concussion in such cases is often due to the alcoholism. We may be able to verify this supposition if the injury is such as would be likely to be caused by a fall. There may be nothing found in the brain after death to distinguish between concussion and alcoholism. ”

“ Concussion.—Temporary loss of function was often observed in the limbs, corresponding to the distribution of one or more nerve trunks when wound tracks had passed in their vicinity. Interference with function sometimes amounted to loss of sensation alone: in others to loss of both sensation and motor power. Such symptoms were of a transitory character, lasting for a few days or a week; if both sensation and motion were impaired, sensation was usually the first to be regained. ”

“ TREATMENT.—Absolute simple rest in bed is all that is necessary in mild cases of concussion. The patient should be well watched for any symptoms which might supervene and show that the injury was more severe than at first supposed. On the other hand, serious symptoms may be present without indicating any great gravity in the case. Children, for example, often have convulsions from the slightest cause. I have attended them when these set in immediately after the injury, but in a day or two there was entire recovery. ”

“ The rapidity with which death followed depended in part on the actual severity of the wound, and still more on the region it affected; the nearer the base and the longer the track the more rapidly the patients died, and this always with [Pg 290] signs of failure of the functions of the heart and lungs due to general concussion, pressure from basal hæmorrhage, or rapid intracranial œdema. In my experience no patients survived direct fracture of the base in any region but the frontal, although many, no doubt, got well in whom fissures merely spread into the middle or posterior fossa. ”