Primitive reflexes
Primitive reflexes
Primitive reflexes (/ˈprɪmɪtɪv ˈriːfleksɪz/; from Latin primitivus, "first" and reflexus, "bent back") are reflex actions originating in the central nervous system that are exhibited by normal infants, but not generally seen in healthy adults due to the development of the frontal lobes. They are essential for development, as they help babies to survive and adapt in the early stages of life.
Types of Primitive Reflexes
There are several types of primitive reflexes, including:
- Moro reflex - This reflex is often called the startle reflex because it usually occurs when a baby is startled by a loud sound or movement.
- Rooting reflex - This reflex begins when the corner of the baby's mouth is stroked or touched.
- Sucking reflex - Rooting helps the baby become ready to suck, and when the roof of the baby's mouth is touched, the baby will begin to suck.
- Palmar grasp reflex - When an object is placed in the infant's hand and strokes their palm, the fingers will close and they will grasp it with a palmar grasp.
- Plantar reflex - This reflex is similar to the palmar grasp reflex but it occurs in the baby's foot, not the hand.
Clinical Significance
The presence of primitive reflexes in an adult or an older child can be a sign of neurological disorders, such as cerebral palsy, brain injury, or developmental delay. Therefore, they are often used in neurological examinations to assess the status of the central nervous system.
See Also
References
External links
- Medical encyclopedia article on Primitive reflexes
- Wikipedia's article - Primitive reflexes
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