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In uncal herniation, a common subtype of transtentorial herniation, the innermost part of the temporal lobe, the uncus, can be squeezed so much that it moves towards the tentorium and puts pressure on the brainstem, most notably the midbrain. [8] The tentorium is a structure within the skull formed by the dura mater of the meninges.
This typically causes impaired nerve function, increased pressure within the skull, and can eventually lead to direct compression of brain tissue and blood vessels. [1] Symptoms vary based on the location and extent of edema and generally include headaches , nausea, vomiting, seizures, drowsiness, visual disturbances, dizziness, and in severe ...
Lateral temporal lobe seizures arising from the temporal-parietal lobe junction may cause complex visual hallucinations. [2] In comparison to medial 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]
Contusions are more commonly seen in the brain parenchyma near base of the skull such as inferior frontal lobes and temporal lobes as a result of Coup contrecoup injury. Those with parenchymal contusion would require frequent follow-up imaging because such contusions may grow large enough to become hemorrhage and exerts significant mass effect ...
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.
Brain MRI is the mainstay of initial investigation pointing to limbic lobe pathology revealing increased T2 signal involving one or both temporal lobes in most cases. [ 22 ] [ 14 ] Serial MRI in LE starts as an acute disease with uni- or bilateral swollen temporomesial structures that are hyperintense on fluid attenuation inversion recovery and ...
The most common long-term complication of viral encephalitis is seizures that may occur in 10% to 20% of patients over several decades. These seizures are resistant to medical therapy. However, individuals who have unilateral mesial temporal lobe seizures after viral encephalitis have good results following neurosurgery.
The swelling is worst at around four to six days after the injury. [3] Extensive contusion associated with subdural hematoma is called burst lobe. [5] Cases of a burst frontal or temporal lobe are associated with high mortality and morbidity. [5]