Furthermore the cause of post stroke depression at a functional level is not clear.

Only at the functional level would the two types of system be equivalent.

According to this theory, the human mind is organized in three functional levels.

This is due to the large energy cost which would need to be spent to maintain their body temperature at functional levels.

Medicines may also take a child to a functional level at which they can benefit from other treatments.

Strategic management can occur at corporate, business, functional and operational levels.

Each system works to maintain a natural and functional level of communication.

Panting, Drake hauled himself back up to a functional level.

A very rich, varied and interesting foundation for all office language skills at three functional levels.

They are designed to regulate and develop the various functional levels of the human system.