Reach and Grasp

Question 1

Crude Palmar grasp (age + description)

Answer 1

4-5m
forearm pronated, thumb does not play a role, simultaneous finger flexion, unable to open hand in relation to object size, object on ulnar side of palm

Question 2

Palmer grasp (age + description)

Answer 2

5-6m

forearm pronated, thumb does not play a role, simultaneous finger flexion, object secured in midsection of palm

Question 3

Radial Palmer (age + description)

Answer 3

6-7m
object secured in radial side of palm, index and middle fingers flex around the object, thumb begins to press object into radial palm, hand begins to adjust to object size

Question 4

Raking Grasp (age + description)

Answer 4

7-8m

reach +grasp with raking motion, all fingers flexed at IPs, fingers hand arm move as one unit

Question 5

Radial Digital (age + description)

Answer 5

8-9m
thumb opposition to radial fingers, object held proximal to finger pads, space visible between object and palm, object can be adjusted in the hand

Question 6

Developmental Scissors Grasp (age + description)

Answer 6

8-9m

object between thumb and radial side of flexed index finger, object trapped against index finger, no thumb opposition

Question 7

Inferior Pincer Grasp (age + description)

Answer 7

8-9m
thumb adduction & emerging opposition to secure object against side of extended index finger, object help proximal to finger pad

Question 8

Three Jaw Chuck (age + description)

Answer 8

10-12m
thumb opposition to index + middle fingers, object held at pads of index and middle fingers, thumb rotates and flexes towards the finger pads, ulnar fingers do not participate

Question 9

Pincer Grasp (age + description)

Answer 9

10-12m
object between opposed thumb and index or middle finger pad, MCP and IP joints of thumb are extended, forearm in midposition

Question 10

Neat Pincer Grasp (age + description)

Answer 10

10-12m

object between opposed tip of index or middle finger and thumb, all joints of index or middle finger are flexed