Sagittal Plane – The sagittal plane is the forwards and backwards movement of a body (but you can also think of it as up and down too)
To remember what the sagittal plane is, recall the following mnemonic:
The satchel is tall (sagittal) and heavy. It's so heavy you can't tell if she is going to fall forwards or backwards.
The sagittal plane denotes forward and backward movement, but also up and down.
To help you remember, think of the following mnemonic:
"I could have fallen forwards, but I fell backwards!"
"Are you going to get up or stay down all day?"
This is the sagittal plane below.
So sagittal plane is the forwards or backwards movement of a body.
This can be simplified with directional arrows.