Reflex which is not present in a child at birth is?
**Core Concept**
The question is testing the presence of reflexes in newborns, which is an essential aspect of pediatric neurology. The development and absence of certain reflexes can indicate neurological disorders or developmental delays.
**Why the Correct Answer is Right**
The correct answer is a reflex that is not present in children at birth, which is the **Tonic Labyrinthine Reflex (TLR)**. The TLR is a reflex that is typically present in infants and is characterized by the extension of the legs and the arching of the back when the infant is held in an upright position. The TLR is thought to be a vestigial reflex that is present in infants to help them detect and respond to changes in their environment. However, the TLR is not present at birth and develops in the first few weeks of life.
**Why Each Wrong Option is Incorrect**
**Option A:** The **Moro Reflex** is a reflex that is present at birth and is characterized by the sudden extension of the arms and the arching of the back when the infant is lifted or dropped. This reflex is a normal response to changes in the infant's environment and is not the correct answer.
**Option B:** The **Asymmetrical Tonic Neck Reflex (ATNR)** is a reflex that is present at birth and is characterized by the extension of the arms and the rotation of the head when the infant is held in a certain position. This reflex is a normal response to changes in the infant's environment and is not the correct answer.
**Option C:** The **Rooting Reflex** is a reflex that is present at birth and is characterized by the turning of the head towards a stimulus on the cheek when the infant is touched or stroked. This reflex is a normal response to changes in the infant's environment and is not the correct answer.
**Option D:** The **Palmar Grasp Reflex** is a reflex that is present at birth and is characterized by the grasping of an object when the infant's palm is stimulated. This reflex is a normal response to changes in the infant's environment and is not the correct answer.
**Clinical Pearl / High-Yield Fact**
The development and absence of certain reflexes can indicate neurological disorders or developmental delays in children. The presence of certain reflexes can also be used as a diagnostic tool to assess the neurological status of a child.
**Correct Answer: C. Rooting Reflex. Rooting Reflex**