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In children, the most common cause is a stroke of the ventral pons. [9]Unlike persistent vegetative state, in which the upper portions of the brain are damaged and the lower portions are spared, locked-in syndrome is essentially the opposite, caused by damage to specific portions of the lower brain and brainstem, with no damage to the upper brain.
One of the unique characteristics of AHC is that hemiplegic attacks, as well as other symptoms which may co-occur with hemiplegia, cease immediately upon sleep. During strong attacks, the symptoms may reoccur upon waking. [4] [6] Hemiplegic attacks can occur suddenly or gradually, and the severity of an attack can vary over its duration. [6]
Todd's paresis (or postictal paresis/paralysis, "after seizure") is focal weakness in a part or all of the body after a seizure. This weakness typically affects the limbs and is localized to either the left or right side of the body.
Paralysis (pl.: paralyses; also known as plegia) is a loss of motor function in one or more muscles. Paralysis can also be accompanied by a loss of feeling (sensory loss) in the affected area if there is sensory damage. In the United States, roughly 1 in 50 people have been diagnosed with some form of permanent or transient paralysis. [1]
During hypoPP attacks, the serum potassium concentrations can drop to less than 3 mM. Furthermore, hypoPP attacks are considerably longer lasting than hyperPP. As exercise is a trigger for periodic paralysis attacks, recently there is more research going into the physiological changes that accompany exercise including changes in blood pH. [3]
English: This image shows an example of affected areas to represent the differences between paraplegia (left), hemiplegia (middle), and quadriplegia (right). Please note these areas may differ for each condition and are dependent upon the neurological level of injury.
Cerebral palsy is the most common movement disorder in children, [13] occurring in about 2.1 per 1,000 live births. [2] It has been documented throughout history, with the first known descriptions occurring in the work of Hippocrates in the 5th century BCE. [ 14 ]
The most common cause of compartment syndrome in children is traumatic injury. [77] In children <10 years of age, the cause is usually vascular injury or infection. [78] In children >14 years of age, the cause is usually due to trauma or surgical positioning. [78] Treatment for compartment syndrome in children is the same as adults. [72]