To understand a little hemiplegia we must know that it is a paralysis of the half of the body, usually the compromised side is the opposite of the hemisphere that has been affected by the LCA, this happens because our pyramid route (our information highway) is decided, that is why hemispheric lesions occur on the contralateral side of the body, the exception would be cases where the cerebellum is damaged, where the condition is represented on the same side of the lesion, this happens because the cerebellum is below the decimation of the pyramidal route.
What is the big difference between hemiplegia and hemiparesis?
When we talk about hemiparesis, we refer to a notable difficulty of movement, while hemiplegia is a greater degree of difficulty, greatly preventing hand and arm movements in addition to the lower limb, however, both terms are correct, they usually have a healthy side and an affected side, in the upper limb there is a characteristic flexor pattern of the hemispheric lesions, where the advanced or fallen shoulder is observed, the arm meets an elbow flexion, accompanied by pronation or a supination and finally the hand in most cases is closed, in the lower limb the pattern will be extension in the leg, with the hip that rises together with the pelvis, the knee will find it with a problem of flexion , where it is reduced or absent, causing the leg to make a semi-circle movement known as “the biaser’s march” although the latter, it is more common in the condition of the left part, on the other hand, the foot can present with more differences, it can arrive with the first contact on the ground with the fingers, with the lateral edge of the foot or even with the whole plant , all this is because of the alteration of cognitive processes in the affected person that leads to paralysis.
On the other hand, it should be borne in mind that right hemiplegia is a consequence of stroke, which by visible characteristics differs from hemiplegia on the left side; Not only because of the side that is affected by paralysis, it also has specific characteristics that give a remarkable differentiation. There are aspects such as Aphasia (known as a language problem), and also Apraxia are common characteristics of right hemiplegia, however we will see later that when we talk about Apraxia things are a bit different.
One of the most common mistakes in the treatment of this disease and its rehabilitation is to offer a similar or equal therapy for both the right and the left; When we deepen the neurocognitive therapy we realize that each type of injury needs a specific and personal rehabilitation to improve the patient’s quality of life, thanks to this method we have a great tool at hand, even that you can work when the patient is found in the first phase of stroke, which is usually in a wheelchair.
How does flaccid to spastic hemiplegia evolve?
In this disease, the first phase is usually flaccid, this is where all specialists, such as neurologists, neurosurgeons, occupational therapists and physiotherapists, are involved, the faster the paralysis is addressed, the prognosis for recovery is better, but this does not mean If, after the injury has passed, correct work cannot be done for the upper and lower limb involved, remember that the brain is plastic and thus allows a functional recovery despite the time of the disease, now, against This first phase, is caused by the inhibition of all neuronal processes due to brain damage, it is a defense mechanism against massive or partial damage to the brain that is why the patient who is bedridden or in a chair wheels are unable to stand up, can occur anywhere, as well as the cerebral cortex, the basal ganglia, the thalamus, the cerebellum, etc. when there is a marked sagging, usually the patient uses a wheelchair to move around his house or anywhere, this happens because he is unable to walk safely with the lower limb, being the first cause of home care , since this affects the activities of your daily life, starting quickly with neurocognitive therapy in this phase, it is essential that as we move forward in the rehabilitation of the lateral part, there is not a considerable increase in tone in what is known As a spastic stage, this evolution is given by the compensatory mechanisms of the body to be able to generate a movement, it is usually more evident in the hand and foot, but also in the arm and leg, this increase in tone can not only be reached to observer in this case, but also on the left side, depending on the side where the stroke occurred.
What types of hemiplegia are there?
There are generally two types of ACV, it can be ischemic, these are usually produced by any obstruction of the cerebral arteries, known as thrombi, and hemorrhages that are caused by the rupture of these thrombi causing a hemorrhage that touches all parts of the brain that are near the area of the lesion, affecting all the brain areas that come into contact with the lesion focus, even a stroke can occur, but in addition to these, a stroke can be caused by a traffic accident that caused some head trauma, they are usually accompanied by multiple fractures depending on the accident, bruises and in some cases the spinal cord can even be compromised, for something called spinal shock, leaving sequelae not only for an Stroke but also for spinal injury, in other cases also a brain tumor can cause a stroke.
What do Right Hemiplegia and Left Hemiplegia have in common?
In the first instance, the common element between both lesions seems to be spasticity, which with respect to the healthy side we can observe a great difference in muscle tone, even, this difference may not be so noticeable in certain occasions, but, something that undoubtedly It occurs in most cases is an alteration of movement, a compromise in a series of muscle groups (such as the forearm, hand, knee, foot, etc.) that prevent a movement is generated correctly, but Beyond that, remember that these occur thanks to the complex organization of our mental processes and when we suffer a stroke that affects any area of the brain, as commonly seen in the cerebral cortex, the internal capsule, cerebellum, thalamus, etc; hemiparesis appears due to an alteration of these cognitive processes mentioned above.
In this same order of ideas, let’s interpret the movement and behavior of our body as the tip of an iceberg, we can only observe the tip that would be the movement, but under the water is the great part of this iceberg, which would be the well-organized mental and cognitive processes that consent to its expression.
Obviously a stroke produced by a thrombus that caused a stroke, it can cause ischemia or in the worst case a rupture that causes a hemorrhagic stroke; it alters the ability to organize all these cognitive processes that allow movement; We often hear about different competences of both hemispheres, which participate with different contributions to our motor acts, our behavior and even our language, for this same reason we must always think that there are common characteristics in both lesions, but more markedly there are several notable differences .
What differences can we find in both types of hemispheric lesions?
Surely you have heard that in our left hemisphere is our capacity for language, well, we can say that this is a half truth, I explain myself better, not all our ability to communicate resides in this area, however something we cannot deny is that there is a high possibility that there is a language problem after suffering a cerebral infarction in this area, these language disorders are associated with right hemiplegia, commonly known as: Aphasias.
Aphasia
They will ask themselves: Why does a person suffering from hemiplegia on the right side lose speech? We must consider that language and movement share many cognitive processes, such as attention, memory, among others, so we can define aphasia as the inability to organize communication, remember that language goes beyond saying a word, For example, if we have a dog that is hungry, he will let us know, he may not tell us anything, but his gestures and body language can give us clues about what he wants, now we go with a person who has this problem of language, you may not be able to tell us verbally that you want or need, however, there are other things that can let us know thanks to another type of nonverbal communication.
Aphasia is a much more complex problem for those who deal with rehabilitation and speech therapy, in fact it is confused with the amnesia of words and the mistake is made of asking our patient to repeat any of these over and over again, with the hope that I can remember or learn it; It really is not so, in reality, in most cases, aphasia does not consist of a problem of words, just as hemiplegia does not consist of a problem of muscular contractions, in reality, it is the difficulty of accessing certains rules and forms of language at a given time and context.
Apraxia
When we talk about this type of problems associated with hemiplegia, usually right, this is the result of an alteration of cognitive processes, that is, those such as attention, learning and the ability to make transformations from the body in different informative modalities, as well as language, vision and perception.
Although this is not entirely clear, but this is only a reflection of the complexity of everything that revolves around apraxia, it is often diagnosed with extreme difficulty and treated with occupational therapy in some cases or rarely with specific and supervised therapies to improve the motor problems of the body.
When suffering a hemorrhage or cerebral ischemia that causes a stroke in the right cerebral hemisphere, there are great risks of suffering from apraxia, as we have seen is an extremely complex clinical picture, there are some tests that allow us to show some aspects of apraxia, personally, the one we use the most is the Renzi test, it is simple and easy to use, it is that the patient must imitate a series of gestures that his therapist shows him visually, he must reproduce them with his voluntary movements in the best way and with the least amount of errors possible, all these gestures are made with the unaffected upper limb, they are movements that involve the shoulder, elbow, forearm, wrist and hand, even movements that vaguely involve the head.
In this way, through this test it is possible to select specific characteristics of the Apraxic notes presented in the patient, as we know the right hand and leg are those that are compromised in these cases.
The curious and particular thing about this test is that it makes us reflect on several important aspects, the imitation will always be directed by the left arm, which should have no alteration, no movement problem, but in reality numerous problems of spatial organization are shown, omission of joints that are being used in the gesture, replacement or changes of orientation and even the lack of rhythm in certain repetitive movements of the arm, all these are basic characteristics for a correct motor behavior.
This makes us reflect a little, strokes do not damage the arm or leg, that is, the problem is in the ability to organize the appropriate movement to the context that is required, therefore, in this type of hemiplegia, they are compromised motor aspects in the limb that was not affected, where no movement problems should appear, these small disorders appear.
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