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Convulsion. A convulsion is a medical condition where the body muscles contract and relax rapidly and repeatedly, resulting in uncontrolled shaking. [1] Because epileptic seizures typically include convulsions, the term convulsion is often used as a synonym for seizure. [1] However, not all epileptic seizures result in convulsions, and not all ...
A seizure is a period of symptoms due to abnormally excessive or synchronous neuronal activity in the brain. [6] Outward effects vary from uncontrolled shaking movements involving much of the body with loss of consciousness (tonic-clonic seizure), to shaking movements involving only part of the body with variable levels of consciousness (focal seizure), to a subtle momentary loss of awareness ...
Epilepsy is a group of non-communicable neurological disorders characterized by recurrent epileptic seizures. [ 10 ] An epileptic seizure is the clinical manifestation of an abnormal, excessive, and synchronized electrical discharge in the neurons. [ 1 ] The occurrence of two or more unprovoked seizures defines epilepsy. [ 11 ]
Febrile seizure. A febrile seizure, also known as a fever fit or febrile convulsion, is a seizure associated with a high body temperature but without any serious underlying health issue. [ 1 ] They most commonly occur in children between the ages of 6 months and 5 years. [ 1 ][ 3 ] Most seizures are less than five minutes in duration, and the ...
Eclampsia is the onset of seizures (convulsions) in a woman with pre-eclampsia. [ 1 ] Pre-eclampsia is a hypertensive disorder of pregnancy that presents with three main features: new onset of high blood pressure, large amounts of protein in the urine or other organ dysfunction, and edema. [ 7 ][ 8 ][ 9 ] If left untreated, pre-eclampsia can ...
Focal seizures (also called partial seizures[1] and localized seizures) are seizures that affect initially only one hemisphere of the brain. [2][3] The brain is divided into two hemispheres, each consisting of four lobes – the frontal, temporal, parietal and occipital lobes. A focal seizure is generated in and affects just one part of the ...
Postictal state. The postictal state is the altered state of consciousness after an epileptic seizure. It usually lasts between 5 and 30 minutes, but sometimes longer in the case of larger or more severe seizures, and is characterized by drowsiness, confusion, nausea, hypertension, headache or migraine, and other disorienting symptoms.
The occipital lobe is the visual processing center of the mammalian brain containing most of the anatomical region of the visual cortex. [ 1 ] The primary visual cortex is Brodmann area 17, commonly called V1 (visual one). Human V1 is located on the medial side of the occipital lobe within the calcarine sulcus; the full extent of V1 often ...