Moro’s reflex persisting for more than 6 months indicates damage to which of following lobes?
**Core Concept**
Morris reflex, also known as Moro reflex, is a reflex that is present in newborns, characterized by a distinctive movement of the arms and legs in response to a sudden loss of support or a loud noise. This reflex typically disappears by 3-6 months of age. However, persistence of this reflex beyond 6 months is considered abnormal and may indicate underlying neurological damage.
**Why the Correct Answer is Right**
The persistence of Moro reflex beyond 6 months is often associated with damage to the frontal lobes of the brain, particularly the motor areas responsible for the coordination and integration of motor responses. The frontal lobes are involved in the regulation of motor functions, including the suppression of reflexes, and damage to this area can lead to the continued presence of primitive reflexes like the Moro reflex.
**Why Each Wrong Option is Incorrect**
**Option B:** Temporal lobes - Damage to the temporal lobes is more likely to affect auditory processing, memory, and language skills, rather than motor reflexes.
**Option C:** Parietal lobes - The parietal lobes are involved in processing sensory information related to touch and spatial awareness, and damage to this area would not typically result in the persistence of the Moro reflex.
**Option D:** Occipital lobes - The occipital lobes are responsible for processing visual information, and damage to this area would not affect motor reflexes like the Moro reflex.
**Clinical Pearl / High-Yield Fact**
The persistence of primitive reflexes beyond the expected age is a red flag for underlying neurological damage or developmental delay, and warrants further evaluation and investigation.
**Correct Answer: C. Parietal lobes are incorrect.**