Which type of muscle attachment is categorized as a 'fleshy attachment'?

A direct attachment to bone is indeed categorized as a 'fleshy attachment.' In this type of attachment, the muscle fibers are directly connected to the periosteum of the bone, which means there is little to no intermediate structure, such as a tendon, between the muscle and the bone. This results in a very strong and immediate connection that allows for efficient force transfer when the muscle contracts.

In contrast, indirect attachment through tendons involves a connective tissue structure that links the muscle to the bone, while aponeurotic attachment refers to a flat, sheet-like tendon serving a similar purpose. Elastic attachments, while not a standard term in muscle anatomy, do not describe a common type of muscle-to-bone connection like the fleshy attachment does. Thus, the direct interaction between muscle fibers and bone in fleshy attachments is key to understanding their role in movement and stability.