It is relatively common for the Flexor digitorum superficialis to be missing from the little finger, bilaterally and unilaterally, which can cause problems when diagnosing a little finger injury.
The grasp reflex (newborn reflexes) It occurs when placing an object, such as a finger, onto the infant's palm (palmar grasp) or sole (plantar grasp). The infant responds by flexing fingers or curling the toes. The palmar grasp usually disappears by 3 to 4 months and the plantar grasp by 6 to 8 months.
Early development of baby milestones is marked by primitive reflexes - reflex actions that occur in response to certain stimuli. These primitive reflexes are important for babies to be able to cope alone after nine months being totally supported in the womb.