How come when you rest your hand down palm facing up your fingers curl up and don't relax down
This is a common phenomenon known as the palmar grasp reflex. It is an involuntary response to a stimulus on the palm of the hand, such as when you place your hand down on a table or other surface. The reflex causes the fingers to flex, or curl up, towards the palm.
The palmar grasp reflex is present in all humans at birth, and it serves an important purpose. It helps infants to grasp objects and bring them to their mouths. The reflex gradually diminishes as a child grows and develops, but it may still be present in some adults.
There are a few possible reasons why the palmar grasp reflex might still be present in adults. One possibility is that the person has a neurological condition that affects the nerves that control the hand muscles. Another possibility is that the person has a history of repetitive hand use, such as playing a musical instrument or working with tools.
If you are concerned about the palmar grasp reflex in your hand, it is important to see a doctor to rule out any underlying medical conditions.
Pre：How do I make curls with a hair straightener
Next：Why do people with severe brain damage curl in their hands