What Is Intrinsic And Extrinsic Muscles?

What Is Intrinsic And Extrinsic Muscles? The intrinsic muscles lie entirely within the tongue, while the extrinsic muscles attach the tongue to other structures. The extrinsic muscles reposition the tongue, while the intrinsic muscles alter the shape of the tongue for talking and swallowing. What is the difference between an intrinsic and an extrinsic muscle?