Typically related to abnormal activity in just one cerebral hemisphere

• A. Generalized Seizure
• B. Partial Seizure
• C. Generalized Tonic-Clonic Seizure
• D. Secondary Seizures

Answer: (B)

Abnormal electrical activity confined to a single cerebral hemisphere describes a focal (partial) seizure. These seizures originate in a localized brain area, so the signs depend on which region is involved—for example, motor cortex activity can cause twitching or jerking in one limb, while involvement of sensory or temporal regions can produce unusual smells, tastes, or automatisms. Consciousness may stay intact in simple focal seizures or be impaired in complex focal seizures. This pattern contrasts with generalized seizures, which start with widespread, bilateral brain involvement right from the onset. A secondary generalized seizure does begin focal, but the key point is that the initial abnormal activity is localized to one hemisphere, which is the hallmark of focal seizures.