Infant<unk> ing adult finger<unk>  (or<unk>  reflex) is a primitive and involuntary reflex found in infants of humans, most primates, and domesticated felines. When an object, such as an adult finger, is placed in an infant's palm, the infant's fingers reflexively<unk>  the object. Kittens and adult cats will<unk>  a finger placed in the palm (leather pad area) of the paw.1b Placement of the object triggers a spinal reflex, resulting from stimulation of tendons in the palm, that gets transmitted through motor neurons in the median and ulnar sensory nerves. The reverse motion can be induced by stroking the back or side of the hand. A fetus exhibits the reflex in utero by 28 weeks into gestation (sometimes, as early as 16 weeks), and persists until development of rudimentary fine motor skills between two to six months of age.
Palmar grasp reflex
Biceps reflex
Tonic vibration reflex
Stretch reflex
Jaw jerk reflex
Terminal digit preference
Plantar reflex
Brachioradialis reflex