What is the name of the neck reflex that makes it difficult to bring both arms to midline while in a supine position?

• A. Asymmetric tonic
• B. Symmetric tonic
• C. Tonic labyrinth prone
• D. Tonic labyrinth supine

Answer: (A)

The reflex that makes it challenging to bring both arms to midline while in a supine position is known as the asymmetric tonic neck reflex (ATNR). This reflex is characterized by the automatic response of the limbs to the position of the head. When the head is turned to one side, the corresponding arm and leg will extend, while the opposite arm and leg will flex. This results in a functional asymmetry where the child or individual is unable to converge both arms toward the midline, as one arm extends and the other flexes based on head position.

In practical terms, the presence of the ATNR can significantly impact activities that require symmetrical arm movements, such as reaching straight ahead. It is particularly relevant in developmental contexts, where the reflex might be observed in infants and can influence their motor development and interaction with their environment. Understanding this reflex is vital for occupational therapy practitioners as they work with clients to improve functional mobility and coordination.