Pyramydial vs. Extra pyramidal (confused about the terms)

Can you explain a major difference between the twos to the level of USMLE? Thanks.

Here is how I understand. Please let me know if they are correct.

Pyramidal tracts = descending corticospinal tract (you have two - Lateral and Anterior - lateral for limbs and anterior for truncal)

Pyramidal signs = seen with UMN lesions.

I am confused about extrapyramidal signs/ tracts though. I saw somewhere that it means LMN signs, then in other place, it says it's of basal ganglia disorders.

Thanks...

Pyramydial vs. Extra pyramidal (confused about the terms)