We seem to be led to some hypothesis like this: in dreaming there is mental activity which in the waking state is either Functionless or else below the psycho-physical threshold of sensibility; because much that is subconscious in the non-dream state is in the dream state fully conscious.
"The Fairy-Faith in Celtic Countries"
W. Y. Evans Wentz
The existing deformities, for example, will have to be corrected, areas of skin removed to relieve Functionless muscles of strain, the body weight appropriately deflected, and the child must be taught to walk with the aid of a support, swinging his limb about, and using it effectively in a correct position.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
The characters given to separate 'Eutamias' from Tamias are based only on the absence or presence of the Functionless premolar, and on the colour pattern.
"Genera and Subgenera of Chipmunks"
John A. White