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Lateral temporal lobe seizures arising from the temporal-parietal lobe junction may cause complex visual hallucinations. [2] In comparison to mesial temporal lobe seizures, lateral temporal lobe seizures are briefer duration seizures, occur with earlier loss of awareness, and are more likely become a focal to bilateral tonic-clonic seizure. [2]
The brain contains four main lobes: temporal lobe, parietal lobe, frontal lobe, and the occipital lobe. The temporoparietal junction lies in the region between the temporal and parietal lobes, near the lateral sulcus (Sylvian fissure). Specifically, it is composed of the inferior parietal lobule and the caudal parts of the superior temporal ...
Temporal lobe epilepsy (TLE) is not a classic syndrome but mentioned here because it is the most common epilepsy of adults. It is a symptomatic localization-related epilepsy and in most cases the epileptogenic region is found in the midline ( mesial ) temporal structures (e.g., the hippocampus , amygdala , and parahippocampal gyrus ).
The abdominal symptoms are believed to be associated with the transmission of impulses from the temporal lobe to the dorsal motor nucleus of the vagus nerve via the dense direct projections. The hypothalamus is also believed to induce sympathetic pathways from the amygdala in the medial temporal lobe to the GI tract to trigger such symptoms.
Spread to produce symptoms of temporal lobe involvement is exceptional and may indicate a symptomatic cause. [ citation needed ] Post-ictal headache , mainly diffuse, but also severe, unilateral and pulsating, or indistinguishable from migraine headache , occurs in half the patients, in 10% of whom it may be associated with nausea and vomiting.
The temporal lobe is located beneath the lateral fissure on both cerebral hemispheres of the mammalian brain. [3] The temporal lobe is involved in processing sensory input into derived meanings for the appropriate retention of visual memory, language comprehension, and emotion association. [4]: 21 Temporal refers to the head's temples.
A hyperintensity or T2 hyperintensity is an area of high intensity on types of magnetic resonance imaging (MRI) scans of the brain of a human or of another mammal that reflect lesions produced largely by demyelination and axonal loss.
[3] [4] Photosensitive seizures are often myoclonic, absence, or focal seizures in the occipital lobe, while musicogenic seizures are associated with focal seizures in the temporal lobe. [3] Triggers may include various stimuli with the most common (75 to 80%) being flickering lights resulting in photosensitive seizures. [3]