The fingers of professional pianists and violinists are very strong, for instrumental manipulation requires and develops strength and co-ordination. Music as an exercise can be used not only for its effect on most of the joints and muscles of the body, but to increase the use of the lungs and larynx. It focuses attention through the use of visual, auditory and tactile senses and stimulates mental activity and interest.
Many instruments may be employed for the mobilization of joints and muscles. When a musical instrument is prescribed as the occupational therapy activity for a patient, there may be some resistance on the part of the patient because of a lack of general or musical education, or the fear of studying something new. The success with which this resistance may be overcome will depend upon the skill of the musical aide not only as a musician but as a teacher. The musical aide will have to convince the patient that the fundamentals of music are far less difficult to learn than is popularly supposed. Much of the notoriety about music lessons is developed among children who dislike regimentation, interference with their play periods, and the length of time it takes the minute hand to circle the clock. The musical aide may cite that observation and impress the patient with the greater ease of adults in learning to play. Interest may be aroused by naming the other patients who have recently learned to play and by demonstrating the advantages in earlier recovery that music offers.
Regardless of their initial attitude towards music lessons, most patients will soon be pleased with their progress and ability to master musical notation. Visits to the craft shop will usually be made on an appointment basis and the patient will leave as soon as his “time” is up. The knowledge newly acquired through instrumental instruction will keep the patient at work longer and the musical aide will find him returning for further practice without coaxing and for desirably longer periods.
Piano. Before considering the use of the piano in occupational therapy, the work of Ortmann[64] should be reviewed.
A joint is the point at which two bones connect. In any moveable joint the essential feature is a sliding of one surface on another. Joined to the sides of the two bones near their ends are ligaments which are strong and inelastic and hold the joints within the joint cavity, and which prevent the joint from exceeding its normal range of motion. But the function of holding the bones together and keeping them in different positions belongs to the controlling muscles. Bones are usually activated by at least two sets of muscles which effect the movements in opposite directions. Normally muscles are under a slight but constant tension known as tonus, and the simultaneous pull of muscles on both sides of the joint presses the bone surfaces closer, and keeps the muscle in a state which makes immediate action possible.
Joints move by virtue of the contractions of the muscles. Most movements are made not by one muscle alone, but rather by the co-ordinated contraction of various muscles and the simultaneous relaxation of their antagonists. As a result of muscle contractions, a chemical change takes place which produces substances in the muscle that interfere with good muscle action. Ordinarily these waste products are carried away by the circulating blood with sufficient speed to prevent noticeable effects. If, however, the muscle produces these deleterious chemicals faster than the blood stream can carry them away, fatigue results. The earliest manifestation of fatigue is inability to relax, and the second contraction may be initiated before relaxation is complete. The second effect of fatigue is interference with rate and quality of contraction. Only relatively brief periods of relaxation are necessary for complete recovery, but these periods are important. When normal muscles practice on the piano, the fatigue limit is rarely reached, but for the weakened muscles of patients, fatigue must be guarded against by limiting duration of continuous playing and by proper interludes of rest. Ordinary piano-playing offers short rest periods because there is a reflex relaxation after the sound is produced and it requires less muscle energy to keep the key depressed than to depress it.
Muscles are excited into contraction by minute bio-electrical impulses which enter through their motor nerves, but the property of contraction is independent of the nerve and can also be accomplished by artificial external stimuli of electricity or mechanical force. The quality of contraction is a function governed by the health and nutrition of the muscle. The nutrition of the muscle depends upon its blood supply, which depends in part upon its warmth. Delicate motions are difficult for cold muscles and artificial warming is advisable before exercise, a fact which assumes greater importance in cold weather.
From the viewpoint of patient interest and instruction, the piano is the best instrument. When equipped with pianola fixtures, it is the one instrument that gives the widest range of activities. Because the piano is difficult to move, playing is restricted to the room in which it is housed and there need be no concern about its interference with other patients if the practice room is sound-proofed, or is situated some distance from the other patients. The piano offers excellent opportunity for flexion of the fingers and thumb, extension, abduction and adduction of the wrist, as well as flexion and abduction of the shoulders and exercise of the neck and back.
The piano can be adapted for use by patients with extremities in hanging casts, which can be supported by sling arrangements attached to the piano or the patient’s neck. It can even be used satisfactorily with a cumbersome airplane splint if a very low bench is substituted for the usual piano chair. The height of the bench can be arranged so that the key-board and hand are on the same level, and the challenge of this position will make the patient try all the harder to use his fingers.
For the contractures resulting from burns of the hands, the piano offers an excellent medium with which to increase joint motion. In depressing the keys the fingers are forcibly flexed. The key surface is much broader and easier to manage than that of the typewriter key. The piano, therefore, offers less of a psychological deterrent to use than does the typewriter. Mistakes at the piano are less annoying because there is nothing to erase but a memory, and the memory of unpleasant things is fortunately short-lived. By means of special musical arrangements and additional notation written next to the printed notes, some fingers can be exercised singly or in any combination desired. The physical exercise or co-ordination of selected fingers can be obtained more subtly by the use of marked music than is possible with most crafts. Some instructors may prefer to mark the keys of the piano with the letters to which they correspond, but this is not really needed in the instruction of adults. A large diagram of the piano keys placed above the musical scale for which they stand may be located to advantage on the wall over the piano.