Sensory Integration and Handwriting

Why does my child have handwriting difficulty? - a sensory explanation

Handwriting difficulties can be due to vestibular, proprioception and crossing midline challenges.

Vestibular System:

Vestibular challenges are those involving the semicircular canals located in the inner ear. This system tells us how our head is positioned and allows us to balance. 

When not working well, we tend to be in constant movement, attempting to hit the vestibular threshold we need to feel “just right”. This movement interferes with our ability to focus and complete tasks well. 

When functioning well, the vestibular system allows for the focus required for handwriting, decreasing the need to rush.

Proprioception:

Proprioception is the sensation in the joints that provides body awareness. Pressure between our joints tells us how much force to use for tasks. 

When functioning well, it allows us to apply appropriate pressure with pencil to paper for handwriting, avoiding hand fatigue or ripping through the paper.

Crossing Midline:

Crossing Midline refers to how the brain interprets spatial concepts such as right/left and forward/backward.

When functioning well, it allows us to write letters and numbers in the correct direction.

The function of these systems can be improved with sensory integration therapies.

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