What is in-hand manipulation?
The ability to hold an object in one hand and move it without assistance from the other hand.
Children start to develop these skills between 2-4 years old with a single object. The order of development of these skills are first finger to palm translation, palm to finger translation, rotation, and lastly shift. By the ages of 6-7, children are able to manipulate and stabilize more than one small object within their hand. This allows children to use these in-hand manipulation skills more purposefully and functionally to complete everyday tasks.
What is the importance?
A child with poor in-hand manipulation can be observed manipulating objects with both hands and/or stabilizing the object with a table or body. Children who have difficulty with in-hand manipulation may be unable to complete certain tasks, require additional time, or may appear clumsy when handling objects. Many daily tasks required these higher level hand skills. Examples include: using a fork and knife, adjusting grip on paper when cutting with scissors, positioning a grip when writing/drawing, manipulating clothing fasteners, and operating tools.
Poor or delayed in-hand manipulation skills can result in difficulties with the following:
Self feeding (utensil usage)
Dressing (clothing fasteners such as buttons, zippers, snaps)
Handwriting (grasping, holding/manipulating writing utensils)
The components of in-hand manipulation:
Rotation: The ability to turn an object end over end. An example of this is flipping a pencil over in one hand to use the eraser instead of writing with the tip of the pencil.
Simple rotation: Simple rotation is the ability to roll a small object between the thumb and finger tips. An example of simple rotation is using the fingertips and thumb to open a small jar.
Complex rotation: Complex rotation is the ability to turn an object end over end. An example of this is flipping a pencil over in one hand to use the eraser instead of writing with the tip of the pencil.
Rotation with stabilization: simple or complex rotation is being performed while holding an object with the hypothenar aspect of the hand (ring and pinky finger).
Shift: The ability to move objects between the fingers. A couple examples of this are when you try to separate two pieces of paper that are stuck together, or when you move your fingers closer to the end of your pen/pencil to begin writing.
Shift with stabilization: the ability to move an objects in a linear manner with finger tips while holding an object with the hypothenar aspect of the hand (ring and pinky finger).
Translation: Translation can be broken into two separate skills: finger to palm translation and palm to finger translation. Kids use finger to palm translation when they pick up small objects like pebbles, marbles, or cheerios one at a time, moving them with the fingers of only one hand into their palm. They use palm to finger translation when they move those small objects from their palm back to their fingertips one at a time to place them on the floor or table.
Finger-to-palm translation: the ability to move an object from fingertips to the palm of the hand. Ex: picking up marbles with fingers and thumb and moving them into the palm.
Palm-to-finger translation: the ability to move an object from the palm of the hand to the finger tips. Ex: moving coins from the palm of the hand to the finger tips to insert them into a piggy bank.
Translation with stabilization: holding an object with the hypothenar aspect of the palm (ring and pinky finger) while moving objects from palm to fingertips or fingertips to palm.
Activities that promote in-hand manipulation skills
Pick up small items (beads) one at a time and store in your palm
Place coins in a piggy bank that are in the palm of your hand
Crumble a piece of paper with one hand only
Lace beads onto a string while holding beads in the palm of your hand
Put small objects in play doh (coins, beads, etc.), locate them with your fingertips and “hide” them in your palm
Move your fingers up and down a pencil, using only the tips of your fingers
Turn pages in book
Separate playing cards
Hold a marker/pen and push lid off with thumb
Playing games that require you to pick up one card at a time
When cutting, practice turning the paper with one hand as you use scissors to cut with the other
Cotton swab painting: use 2 different paint color on each end of the cotton swab
Manipulate pegs for Lite Brite
Playing with Legos
Nuts and bolts activity, screw the nuts onto the bolts
Puzzles – rotate piece to fit into the proper place
Try stacking dice with the same number showing on each side, rotate to find the number