**Question:** The commonest type of seizure in a newborn is

A. Generalised tonic-clonic seizures
B. Absence seizures
C. Focal seizures
D. Status epilepticus

**Correct Answer:** C. Focal seizures

**Core Concept:** Seizures in newborns can be broadly categorized into generalized and focal types. In general, neonates are more prone to focal seizures compared to generalized seizures.

**Why the Correct Answer is Right:** Focal seizures involve one or a limited number of brain regions, while generalized seizures involve the entire brain. In newborns, focal seizures are more common due to immature brain development, which makes the brain more susceptible to localized neuronal hyperexcitability.

**Why Each Wrong Option is Incorrect:**

A. Generalized tonic-clonic seizures are less common in newborns as compared to focal seizures. Although they can occur in neonates, the onset usually occurs later in life.

B. Absence seizures are characterized by brief, brief episodes of lost consciousness, typically lasting less than 15 seconds. They are less common in newborns as compared to focal seizures.

D. Status epilepticus is a prolonged seizure lasting more than 5 minutes or multiple seizures without regaining full consciousness in between. It is not a type of seizure itself but rather an ongoing seizure that requires immediate intervention.

**Clinical Pearl:**

Newborns with seizures need prompt evaluation and management, as neonatal seizures can have significant clinical implications due to their immature brain development and vulnerability.

**Explanation:**

In the case of focal seizures, the brain is unable to regulate neuronal excitability due to immaturity, leading to the onset of seizures. This can be associated with various conditions like hypoxic-ischemic encephalopathy, hypoglycemia, hypocalcemia, and infections like meningitis, encephalitis, or congenital infections like rubella, toxoplasmosis, and cytomegalovirus (TORCH infections).

**Correct Answer Explanation:**

The correct answer is focal seizures (C) due to the underlying etiology mentioned above. Neonates are more prone to focal seizures due to immature brain development, which makes the brain more susceptible to localized neuronal hyperexcitability.

**Why Each Wrong Option is Incorrect:**

A) Generalized tonic-clonic seizures (A) are less common in newborns as compared to focal seizures. While they can occur in neonates, the onset usually happens later in life.

B) Absence seizures (B) are characterized by brief episodes of lost consciousness, typically lasting less than 15 seconds. These are less common in newborns as compared to focal seizures.

D) Status epilepticus (D) is not a seizure type itself but refers to an ongoing seizure lasting more than 5 minutes or multiple seizures without regaining full consciousness in between. It is not a correct answer to the question of the commonest type of seizure in newborns.

**Clinical Pearl:**

Newborns with seizures require prompt evaluation and management due to their immature brain development and vulnerability. Identifying the underlying cause is crucial to