<unk> s can be either generalized or focal seizures or both. However, for any given stimulus there may be a large variation in the kind of elicited seizure. For example, reading epilepsy may cause myoclonic jerks in the jaw or may cause focal seizures in the regions of the brain responsible for reading. In<unk>  epilepsy generalized seizures are more common than focal seizures. Generalized seizures Generalized seizures are seizures that arise in large areas of the brain including both hemispheres. Generalized seizures can take the form of myoclonic jerks, absences, or generalized tonic-clonic seizures. Myoclonic jerks are the most common generalized seizures seen among<unk> s and can be the located in the limbs, trunk, or in specific regions of the body (Ex. in the muscles of the jaw or the eyelids).<unk>  absence seizures are also common especially in response to certain kinds of triggering stimuli such as light, proprioseptive, cognitive, emotional, or linguistic. Generalized tonic-clonic seizures are less common and can occur independently or more commonly after a cluster of myoclonic jerks or absence seizures. Focal seizures Focal seizures are seizures that arise from a small area of the brain in one hemisphere. Focal seizures are divided into simple or complex focal seizures. Simple focal seizures do not involve the impairment of consciousness but instead may have motor, sensory, or autonomic manifestations. Complex focal seizures do involve impairment or loss of consciousness. Focal seizures are usually only seen in certain types of<unk>  epilepsies such as occipital lobe seizures in photosensitive occipital lobe epilepsies or temporal lobe seizures in musicogenic epilepsies. Focal seizures can be located only in the area of the brain responsible for the stimulus, spread to other areas of the brain, or even develop into a generalized seizure. Triggers Stimuli that cause<unk> s can be categorized as either intrinsic or extrinsic. For a give person, the stimulus that triggers may be intrinsic, extrinsic, or a combination of both. Extrinsic stimuli Extrinsic stimuli are sensory stimuli that originate from the person's environment. Similar to intrinsic stimuli, extrinsic stimuli can be divided into two categories, either simple or complex. Examples of simple extrinsic stimuli include flashing lights or touch while complex extrinsic stimuli can include music, language, reading, or stimulation from eating. Some of the more common types of<unk>  epilepsy include light and music. Photosensitive epilepsy is an abnormal sensitivity of the brain to visual stimuli and is the most common trigger in<unk> s.<unk> s can be induced by both flickering or non-flicking light, television, video games, or other visual patterns. Most people who have photosensitive epilepsy are sensitive to specific patterns for visual stimuli. Visual stimuli of a particular frequency (15-25 flashes/second), wavelength (red light at 660-720 nm), and at high contrast have been shown to have a higher risk of inducing seizures in people who are photosensitive. In addition, emotional excitement, fatigue, or length of exposure can all effect the risk of seizures. Musicogenic epilepsy is a rare<unk>  epilepsy that is thought to be an abnormal sensitivity of the brain to musical stimuli, however, the exact mechanism of these seizures is unknown. People with musicogenic epilepsy may have seizures triggered not just by musical stimuli but also by the emotional content or memory associated with that melody or rhythm. Seizures can also be triggered when people with the condition think about certain kinds of music without actually hearing the music. In addition, musicogenic epilepsy may occur with sounds that one would not usually associate with music, the sounds of machinery for example. While certain types of music may induce a seizure in a certain person, listening to other kinds of music may prevent or terminate the epileptic activity. Intrinsic stimuli Intrinsic stimuli are specific actions or activities performed by the person that result in a<unk> . Intrinsic stimuli can be divided into two categories, either elementary or elaborate. Elementary intrinsic stimuli are usually simple motor movements while elaborate intrinsic stimuli can include emotions, thoughts, calculations or decision making. Thinking epilepsy is a rare form of<unk>  epilepsy that is triggered by a specific cognitive task. This can include thinking, calculations, solving problems, abstract reasoning, or making decisions. Thinking epilepsy does not occur in response to reading, writing, or verbal communication. Reading epilepsy is recognized as another distinct kind of<unk>  epilepsy. Thinking epilepsy usually results in generalized seizures which manifest as bilateral monoclonus, absence seizures, or generalized tonic-clonic seizure that are preceded by myoclonic jerks.
Reflex seizure
Musicogenic seizure
Gelastic seizure
Non-epileptic seizure
Absence seizure
Focal seizure
Atonic seizure
Febrile seizure