Disturbances of Sensation.—Pain occurs in nearly all cases. It is most frequently a secondary result of the burns and other injuries. Not rarely, however, it exists as a direct symptom in the form of a burning or stinging neuralgia in the limb or limbs affected. Sometimes the first sensation on the recovery of consciousness seems to be pain all over the body or confined to some portions only, but the amount and character of the pain, aside from that produced by the injuries, varies much. One patient had a burning pain in the back and leg lasting only half an hour after recovery of consciousness. In another case there were pains all over at the end of the first week. On the whole, severe pain in some or all of the limbs, and less commonly in the head, without paralysis and lasting some days is not rare. In one case reported by Paige the patient had intense pain in the head, neck, arms, and chest; that in the head was constant, severe, and lasted seven days, elsewhere less constant.
Pain in the arms accompanied by paralysis and anæsthesia and lasting three months has been reported.
Headache is not rare as a later or secondary symptom.
Disturbances of sensation other than pain are not rare.
A certain amount of hyperæsthesia almost always exists in the portion affected immediately after the stroke. This is often so marked that it cannot be wholly due to the burns or other injuries. It is usually very temporary and ceases in a few hours. In some cases a permanent or lasting sensitiveness to the action of electricity is said to remain.
Anæsthesia, loss or diminution of sensation, occurs either with or without paralysis. In the cases reported by Balfour, one boy said he could not feel his legs and another that his arms were cut off. In a case reported by Free there was loss of sensation in the right upper extremity from the elbow to the fingers and in the left lower extremity from the knee to the toes. As a rule, the loss of sensation is temporary and quickly passes away, but it may last, in company with paralysis, for some time. In such cases either an organic lesion or a traumatic neurosis is to be suspected.
Paræsthesiæ are very common after lightning stroke. Most frequent, perhaps, is the subjective sensation of numbness. Tingling, formication, and the sense of “pins and needles” may occur.
Reflexes.—As a rule, the deep reflexes seem to remain normal. The superficial reflexes of the parts affected are at least temporarily increased.
Special Senses.—Sight.—Affections of the eye. The eye and the surrounding parts may be directly injured by burning. We also find many serious conditions caused by the lightning the pathology of which will be considered later. When a person is first struck he may perceive a flash of light or a ball of fire before losing consciousness. While unconscious the pupils are usually dilated, but react. Sight may be at once totally lost, but this is usually only temporary. There may be amblyopia; photophobia, lachrymation, and pain are not uncommon for a time. Cataract may be produced and other severe ocular affections may result.