Frontal Lobe Seizures

Can semiology predict psychogenic nonepileptic seizures? a prospective study

“…In VEEG interpretation, seizure semiology complements EEG data, and may occasionally help expose an ''elusive'' epileptogenic focus when ictal scalp EEG tracings appear normal (eg, mesial frontal lobe epilepsy). 15 However, for reducing diagnostic delay of PNES, the value of seizure semiology lies in history-taking during the first outpatient visits, where practitioners can inquire about PNES early in the course of disease by asking eyewitnesses of patients' seizures to confirm presence or absence of PNES-specific signs. This implies that semiology can help reduce diagnostic delay of PNES only to the extent that eyewitnesses can recall whether or not seizurespecific signs have actually occurred in patients' seizures.…”

Thalamic T-Type Ca2+Channels Mediate Frontal Lobe Dysfunctions Caused by a Hypoxia-Like Damage in the Prefrontal Cortex

“…Instead, patients with FLE show cognitive dysfunctions that have been reported in other neuropsychiatric disorders (Stores et al, 1991;Scheffer et al, 1995;Jobst and Williamson, 2005;Hermann et al, 2007). It is unclear how a local seizure is initiated in the frontal cortex and then leads to complex behavioral abnormalities.…”

The Role of EEG in the Diagnostic Work up in Psychiatry: Nonconvulsive Status Epilepticus, Frontal Lobe Seizures, Non‐Epileptic Seizures

“…Also it has been reported that when an EEG is performed in the outpatient setting it detects inter-ictal epileptiform abnormalities in only 29-55% of patients, in any type of focal epilepsy. Also several series have reported no EEG changes even during ictal recording in 33-36% of patients [29].…”

“…r It is important to remember that a normal interictal EEG is not always helpful in ruling out a neurogenic seizure disorder since 29 to 55% of first-time interictal EEGs in seizure patients are normal [29]. Simple partial seizures and complex partial seizures can be difficult to capture on surface EEG recordings.…”

“…Simple motor automatisms and complex motor automatism in the form of alternating bizarre motor activity or repetitive motor activity may also occur in seizures of frontal lobe origin [30,31] [Table 6.5]. Seizures originating in the supplementary motor area are usually brief, lasting 10-15 s. They can present with bilateral symmetric tonic posturing and the patient can be conscious throughout the seizures [29,30].…”